CC 2012-12-11_11.b. Adoption of 2013 Multi-Jurisdictional Hazard Mitigation PlanMEMORANDUM
TO: CITY COUNCIL
FROM: JOEL ARANAZ, FIRE CHIEF
BY: DAVID L. MATHE, EMERGENCY PREPAREDNESS COORDINATOR
SUBJECT: CONSIDERATION OF A RESOLUTION ADOPTING THE 2013 UPDATE
OF THE MULTI-JURISDICTIONAL HAZARD MITIGATION PLAN
DATE: DECEMBER 11, 2012
RECOMMENDATION:
It is recommended the City Council adopt the Resolution adopting the 2013 Update of
the Multi-Jurisdictional Local Hazard Mitigation Plan.
IMPACT ON FINANCIAL AND PERSONNEL RESOURCES:
There are no negative fiscal impacts associated with this action. The Multi-
Jurisdictional Hazard Mitigation Plan ("Plan") is a prerequisite to receiving certain
disaster reimbursement funding. Failure to adopt the Multi-Jurisdictional Hazard
Mitigation Plan may jeopardize disaster reimbur~ement in the event of an occurrence
of local consequence.
BACKGROUND:
In March 2008, the Federal Emergency Management Agency (FEMA) approved the
Multi-Jurisdictional Local Hazard Mitigation Plan for the Cities of Arroyo Grande and
Grover Beach and the Lucia Mar Unified School District. It is required that Local
Hazard Mitigation Plans are to be revised every 5 years to reflect any hazard changes
within the plans. The 2008 FEMA approved Plan is scheduled to be revised on or
before March 2013. Planning work was started in late 2011 and continued into the third
quarter of 2012.
ANALYSIS OF ISSUES:
The Cities of Arroyo Grande and Grover Beach, the South San Luis Obispo County
Sanitation District, and the Lucia Mar Unified School District, have united to develop a
jurisdiction specific hazard mitigation plan. The City of Arroyo Grande acted as Project
Manager for the 2008 Plan and it was agreed by all partners that the Five Cities Fire
Authority would continue in that role for the 2013 revised plan. The City of Arroyo
Grande was approached by the South San Luis Obispo County Sanitation District
to become partners in the 2013 Plan. They were welcomed to participate in the Plan
development process.
Item 11.b. - Page 1
CITY COUNCIL
CONSIDERATION OF ADOPTING THE 2013 UPDATE OF THE MULTI-
JURISDICTIONAL HAZARD MITIGATION PLAN
DECEMBER 11,2012
PAGE2
The goal is to update the 2008 Plan and to arrive at practical, meaningful, attainable
and cost-effective mitigation solutions to minimize each jurisdiction's vulnerability to the
identified hazards and ultimately reduce both human and financial losses subsequent to
a disaster. Once adopted, this Plan will be submitted to the California Emergency
Management Agency and the Federal Emergency Management Agency.
The Disaster Mitigation Act (DMA) of 2000, also commonly known as "The 2000
Stafford Act Amendments" (the "Act"), constitutes an effort by the Federal government
to reduce the rising cost of disasters. The Act stresses the importance of mitigation
planning and disaster preparedness prior to an event. Mitigation Planning Section 322
of the Act requires local governments to develop and submit mitigation plans in order to
qualify for the Hazard Mitigation Grant Program (HMGP) project funds. It also increases
the amount of HMGP funds available to states meeting the enhanced planning criteria,
and enables these funds to be used for planning activities.
To facilitate implementation of the 2000 DMA, FEMA created an Interim Final Rule (the
"Rule"), published in the Federal Register in February of 2002 at section 201 of 44 CFR.
The Rule spells out the mitigation planning criteria for states and local communities.
Specific requirements for local mitigation planning efforts are outlined in section §201.6
of the Rule. Local jurisdictions must demonstrate that proposed mitigation actions are
based upon a sound planning process that accounts for the inherent risk and
capabilities of the individual communities as stated in section §201.5 of the Rule.
In developing this comprehensive Multi-Jurisdictional Hazard Mitigation Plan, FEMA's
Multi-Hazard Mitigation Planning Guidance (July 2008) was strictly adhered to for the
purpose of ensuring thoroughness, diligence, and compliance with the new 2000 DMA
planning requirements.
Each of the participating jurisdictions have provided input consisting of Hazard
Analysis, Hazard Mitigation actions, Hazard Identification, Vulnerability Assessment
and Risk Assessment. Planning meetings with partner staff was conducted through the
entire revision process.
A summary of key mitigation measures included in the plan for Arroyo Grande are:
Flood:
• Conduct cost to benefit analysis on expanding retention basins at various
locations.
• Creation of Bio-swales for water conservation.
• Conduct cost to benefit analysis for design and construction of creek restoration
and enhancement improvements to TallyHo Creek to reduce flooding potential.
Item 11.b. - Page 2
CITY COUNCIL
CONSIDERATION OF ADOPTING THE 2013 UPDATE OF THE MULTI-
JURISDICTIONAL HAZARD MITIGATION PLAN
DECEMBER 11, 2012
PAGE 3
Earthquakes:
• Identify and catalog seismically vulnerable structures.
• Notify public of the location of earthquake faults.
• Notify public of location of seismic vulnerable structures.
Wildland Fires:
• Encourage the 1 00' defensible space around structures in the Wildland Urban
Interface.
• Continue weed abatement program.
• Enforce codes and ordinances that eliminate the use of wood shake roofs.
• Enforce codes and ordinances requiring the use of fire sprinkler systems in all
newly constructed structures.
Dam Inundation:
• Create a community specific evacuation plan.
• Exercise plan for effectiveness.
• Revise evacuation plan as appropriate.
ADVANTAGES:
Planning ahead helps residents, businesses, and government agencies effectively
respond when disasters strike; and keeps public agencies eligible for HMGP funding.
The long-term benefits of mitigation planning include:
1. Greater understanding of hazards faced by a community;
2. Use of limited resources on hazards with the greatest effect on a community;
3. Financial savings through partnerships for planning and mitigation;
4. Reduced long-term impacts and damages to human health and structures, and
lower repair costs.
DISADVANTAGES:
Without an adopted Multi-Jurisdictional Hazard Mitigation Plan, the City and other plan
participants would be ineligible for:
1. Hazard Mitigation Grant Programs;
2. Pre-Disaster Mitigation Program;
3. Flood Mitigation Assistance Program.
Item 11.b. - Page 3
CITY COUNCIL
CONSIDERATION OF ADOPTING THE 2013 UPDATE OF THE MULTI-
JURISDICTIONAL HAZARD MITIGATION PLAN
DECEMBER 11, 2012
PAGE4
ALTERNATIVES:
The following alternatives are provided for the Council's consideration:
1. Adopt the Resolution adopting the 2013 Update of the Multi-Jurisdictional Local
Hazard Mitigation Plan; or
2. Do not approve the Resolution; or
3. Provide direction to staff.
ENVIRONMENTAL REVIEW:
No environmental review is required for this item.
PUBLIC NOTIFICATION AND COMMENTS:
The opportunity for public input was advertised in the San Luis Obispo County
newspaper, The Tribune, and the Five Cities newspaper, the Times-Press-Recorder.
The Draft of the Hazard Mitigation Plan was posted on the Five Cities Fire Authority
web page for public comment and review for 30 days ending on October 31, 2012.
The Agenda was posted in front of City Hall on Thursday, December 6, 2012. The
Agenda and report were posted on the City's website on Friday, December 7, 2012. No
public comments were received.
Attachments:
1. Local Hazard Mitigation Plan
Item 11.b. - Page 4
RESOLUTION NO.
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ARROYO
GRANDE ADOPTING THE 2013 UPDATE OF THE MULTI-
JURISDICTIONAL HAZARD MITIGATION PLAN
WHEREAS, the cost of disaster recovery in the United States has dramatically increased
over the past decade promoting interest in providing effective ways to minimize our
country's hazard vulnerability; and
WHEREAS, the Federal Disaster Mitigation Act of 2000 constitutes an effort by the
Federal government to reduce the rising cost of disasters; and
WHEREAS, the Federal Disaster Mitigation Act of 2000 ties mitigation funding to cities,
counties, and special districts that have adopted Local Hazard Mitigation Plans; and
WHEREAS, the purpose of the Federal Disaster Mitigation Act of 2000 was to establish a
national program for pre-disaster mitigation, streamline administration of disaster relief at
both the Federal and state levels, and control Federal costs of disaster assistance; and
WHEREAS, the City of Arroyo Grande seeks to maintain and enhance both a disaster-
resistant City and region by reducing the potential loss of life, property damage, and
environmental degradation from natural disasters, while accelerating economic recovery
from those disasters; and
WHEREAS, the City of Arroyo Grande has gone through the planning process with
extensive community participation and developed a Multi-Jurisdictional Hazard Mitigation
Plan that meets the needs established by the Federal Disaster Mitigation Act of 2000.
NOW, THEREFORE BE IT RESOLVED that the City Council of the City of Arroyo
Grande adopts the 2013 Update of the Multi-Jurisdictional Hazard Mitigation Plan for the
Cities of Arroyo Grande and Grover Beach, the Lucia Mar Unified School District, and the
South San Luis Obispo County Sanitation District.
BE IT FURTHER RESOLVED that a copy of this Resolution and a copy of the 2013
Update of the Multi-Jurisdictional Hazard Mitigation Plan will be forwarded to the
California Emergency Management Agency and the Federal Emergency Management
Agency.
On motion by Council Member , seconded by Council Member
and on the following roll call vote, to wit:
AYES:
NOES:
ABSENT:
the foregoing Resolution was passed and adopted this 11 1 h day of December, 2012.
Item 11.b. - Page 5
RESOLUTION NO.
PAGE 2
TONY FERRARA, MAYOR
ATTEST:
KELLY WETMORE, CITY CLERK
APPROVED AS TO CONTENT:
STEVEN ADAMS, CITY MANAGER
APPROVED AS TO FORM:
TIMOTHY J. CARMEL, CITY ATTORNEY
Item 11.b. - Page 6
MULTI-JURISDICTIONAL
LOCAL HAZARD MITIGATION PLAN
City of Arroyo Grande, CA.
City of Grover Beach, CA.
Lucia Mar Unified School District, Arroyo Grande, CA.
South San Luis Obispo County Sanitation District, Oceano, CA.
Month-Day-Year
Author
Item 11.b. - Page 7
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 2
Sanitation District.
Table of Contents
Item 11.b. - Page 8
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 3
Sanitation District.
Arroyo Grande Resolution
DMA 2000 Requirement
§201.6(c)(5)
Item 11.b. - Page 9
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 4
Sanitation District.
Grover Beach Resolution
DMA 2000 Requirement
§201.6(c)(5)
Item 11.b. - Page 10
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 5
Sanitation District.
Lucia Mar Unified School District Resolution
DMA 2000 Requirement
§201.6(c)(5)
Item 11.b. - Page 11
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 6
Sanitation District.
South San Luis Obispo County Sanitation District Resolution
DMA 2000 Requirement
§201.6(c)(5)
Item 11.b. - Page 12
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 7
Sanitation District.
I. EXECUTIVE SUMMARY
A. General Plan Description
The Cities of Arroyo Grande and Grover Beach, the South County Sanitation District, and the Lucia Mar Unified
School District, have united to develop a jurisdiction specific hazard mitigation plan. The goal of this multi-
jurisdictional plan is to arrive at practical, meaningful, attainable and cost-effective mitigation solutions to
mini mizeAeachAjurisdiction’sAvulnerabilityAtoAtheAidentifiedAhazardsAandAultimatelyAreduceAbothAhumanAandA
financial losses subsequent to a disaster.
Development of this mitigation plan entailed assessing the planning capabilities, securing political support and
soliciting input and approval from each of the involved communities. Risk assessments were then performed
which identified and evaluated each natural and man-made hazard that could impact these areas. Historical
hazard events are described. The future probability of these identified hazards and their impact on each of
these communities is described.
VulnerabilityAassessmentsAwereAperformedAwhichAsummarizedAtheAidentifiedAhazards’AimpactAtoAeachA
community’sAcriticalAstructuresAandAinfrastructureAandA future development. An estimate of the potential dollar
losses to vulnerable structures was determined.
The risk and vulnerability assessments were used to determine mitigation goals and objectives to minimize long-
term vulnerabilities to the identified hazards. These goals and objectives were the foundation behind the
development of a comprehensive range of specific attainable mitigation actions created for each jurisdiction.
An action plan has been developed which entails adopting, implementing, assigning responsibility, monitoring,
and reviewing this hazard mitigation plan over time, to ensure the goals and objectives are being achieved and
the plan remains a relevant document.
B. Plan Purpose and Authority
The Disaster Mitigation Act (DMA) of 2000, alsoAcommonlyAknownAasA“TheA2000AStaffordA ctA mendments”A(theA
Act), constitutes an effort by the Federal government to reduce the rising cost of disasters. The Act stresses the
importance of mitigation planning and disaster preparedness prior to an event .
Mitigation Planning Section 322 of the Act requires local governments to develop and submit mitigation plans in
order to qualify for the Hazard Mitigation Grant Program (HMGP) project funds. It also increases the amount of
HMGP funds available to states meeting the enhanced planning criteria, and enables these funds to be used for
planning activities.
To facilitate implementation of the DMA 2000, the Federal Emergency Management Agency (FEMA) created an
Interim Final Rule (the Rule), published in the Federal Register in February of 2002 at section 201 of 44 CFR. The
Rule spells out the mitigation planning criteria for States and local communities. Specific requirements for local
mitigation planning efforts are outlined in section §201.6 of the Rule. Local jurisdictions must demonstrate that
proposed mitigation actions are based upon a sound planning process that accounts for the inherent risk and
capabilities of the individual communities as stated in section §201.5 of the Rule.
In developing this comprehensive Multi-jurisdictionalAHazardAMitigationAPlan,AAFEM ’sAMulti -Hazard Mitigation
Planning Guidance (July 2008) was strictly adhered to for the purpose of ensuring thoroughness, diligence, and
compliance with the new DMA 2000 planning requirements .
Item 11.b. - Page 13
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 8
Sanitation District.
II. PLANNING PROCESS
A. DMA 2000 Requirements
§201.6(b) An open public involvement process is ess ential to the development of an
effective plan. In order to develop a more comprehensive approach to reducing
the effects of natural disast ers, the planning process shall include:
§ 201.6(b) (1) (1) An opportunity for the public to comment on the plan during the drafting
stage and prior to plan approval;
§201.6(b) (2) (2) An opportunity for neighboring communities, local and regional agencies
involved in hazard mitigation activities, and agencies that have the authority to
regul ate development, a s well as businesses, academia and other private
and non -profit interests to be involved in the planning process; and
§ 201.6(b) (3 ) (3) Review and incorporation, if appropriate, of existing plans, studies,
reports, and technical i nformation.
§ 201.6(c) (1) [The plan shall document] the planning pro cess used to develop the plan
including how it was prepared, who was involved in the process, and how
the public was involved.
§201.6(c)(2)(i) [The risk assessment shall include a] description of the local and extent of all
natural hazards that can affect the jurisdiction. The plan shall include
information on previous occurrences of hazard events and on the probability
of future hazard events.
§201.6(c)(2)(ii) [The risk assess ment shall include a] description of the type of all natural
hazards that can affect the jurisdiction.
§201.6(c)(3) [The Local Hazard Mitigation Plan must include a] mitigation strategy that
providesAtheAjurisdiction’sAblueprintAforAreducingAtheApoten tial losses
identified in the risk assessment, based on existing authorities, policies,
programs, and resources, and its ability to expand on and improve these
existingAtools.”
§201.6(c)(3)(i) [The hazard mitigation strategy shall include a] description of mitigation goals
to reduce or avoid long -term vulnerabilities to the identified hazards.
§201.6(c)(3)(ii) [The mitigation strategy shall include a] section that identifies and analyzes a
comprehensive range of specific mitigation actions and projects being
considered to reduce the effects of each hazard, with particular emphasis on
new and existing buildings and infrastructure.
Item 11.b. - Page 14
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 9
Sanitation District.
A. DMA 2000 Requirements (continued)
§201.6(c)(3)(iii) [The mitigation strategy section shall include] an action plan describing how the
actins identified in section (c)(3)(ii) will be prioritized. Prioritization shall
include a special emphasis on the extent to which benefits are maximized
according to a cost benefit review of the proposed projects and their associated
costs.
§ 201.6(c) (4) (i) [The plan maintenance process shall include a] section describing the
method and schedule of monitoring, evaluating, and updating the
mitigation plan within a five-year cycle.
§201.6(c)(4)(ii) [The plan shall include a] process by which local governments incorporate the
requirements of the mitigation plan into other planning mechanisms such as
comprehensive or capital improvement plans, when appropriate.
§ 201.6(c) (4) (iii) [The plan maintenance process shall include a] discussion on how the
Community will continue public participation in the plan maintenance
process.
B. Revised Plan Development
In March 2008 FEMA approved the Local Hazard Mitigation Plan for the Cities of Arroyo Grande and Grover
Beach and the Lucia Mar Unified School District. It is required that Local Hazard Mitigation Plans are to be
revised to reflect any Hazard changes within the Plans partners. The 2008 Plan is scheduled to be revised on or
before March 2013. Planning work was started in late 2011 and continued into the third quarter of 2012.
The City of Arroyo Grande acted as Project Manager for the 2008 Plan . It was agreed by all partners that the
Five Cities Fire Authority would continue in that role for the 2013 revised plan.
The City of Arroyo Grande was approached by the South County Sanitation District to become partners in the
2013 Plan. They have been welcomed to participate in the Plan Development process.
C. Public and Jurisdiction Input Process §201.6(b)
Each of the participating jurisdictions have provided input consisting of Hazard Analysis, Hazard Mitigation
actions, Hazard Identification, Vulnerability Assessment and Risk Assessment. Planning meetings with partner
staff was conducted through the entire revision process.
D. Public Comment § 201.6(b) (1)
The opportunity for public input was advertised in the San Luis Obispo County newspaper, the Tribune, the Five
Cities newspaper, the Times-Press-Recorder, KSBY-TV local NBC affiliate, KCOY-TV local CBS affiliate, KVEC radio,
and Coast News.
The Draft of the Hazard Mitigation Plan was posted on the Five Cities Fire Authority web page for public comment
and review for 30 days, ending October 31, 2012. On December 11, 2012 , the Arroyo Grande City Council public
testimony on the plan and adopted it by resolution insert #. On November 19, 2012 the Grover Beach City
Council reviewed the plan and received additional Public testimony and adopted the plan by resolution insert #.
§201.6(c)(3)(iii) [The mitigation strategy section shall include] an action plan describing how
the actions identified in section (c)(3)(ii) will be prioritized. Prioritization shall
include a special emphasis on the extent to which benefits are maximized
according to a cost benefit review of the proposed projects and their
associated costs.
§ 201.6(c) (4) (i) [The plan maintenance process shall inc lude a] section describing the
method and schedule of monitoring, evaluating, and updating the
mitigation plan within a five -year cycle.
§201.6(c)(4)(ii) [The plan shall include a] process by which local governments incorporate the
requirements of the m itigation plan into other planning mechanisms such as
comprehensive or capital improvement plans, when appropriate.
§ 201.6(c) (4) (iii) [The plan maintenance process shall include a] discussion on how the
Community will continue public participation in the plan maintenance
process.
Item 11.b. - Page 15
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 10
Sanitation District.
On insert date, the Lucia Mar Unified School District board, in a public hearing adopted the plan as its official
document by resolution. Insert resolution #. On November 7, 2012 he South County Sanitation District Board
of Directors, in a public hearing, adopted the plan as its official document by resolution insert #.
Arroyo Grande Hazard Mitigation Plan Revision Planning Group
Name Representing
Caren Ra y Council Member
Dan Langstaff Arroyo Grande Police Department Detective Sergeant
Randy Russom Citizen
Matt Downing California Polytechnic State University Intern to the
City of Arroyo Grande
David Mathe Five Cities Fire Authority, Project Manager
Grover Beach Hazard Mitigation Revision Planning Group
Name Representing
Bob Perrault Grover Beach City Manager
Jim Copsey Grover Beach Police Chief
Breven Baima Citizen
David Mathe Five Cities Fire Authority, Project Manager
South County Sanitation Hazard Mitigation Revision Planning Group
Name Representing
Tony Ferrara SCSD Board Member
Bob Barlogio SCSD Superintendent
Joe Costello Citizen
David Mathe Five Cities Fire Authority, Project Manager
Lucia Mar Unified School District
Name Representing
Kevin F. Baker Lucia Mar Unified School District
Denise Bailey Lucia Mar Unified School District
David Mathe Five Cities Fire Authority, Project Manager
MatthewADowning,AaACityAandARegionalAPlanningAMaster’sACandidateAatA California Polytechnic State University,
San Luis Obispo and Planning Intern with the City of Arroyo Grande Community Development Department, was
assigned to this project. He provided GIS mapping services, acted as a liaison from the Community Development
Department to provide information concerning current and future development projects within Arroyo Grande,
and provided an educational viewpoint on the update of Local Hazard Mitigation Plans. Mr. Downing was critical
to the revision of this Plan.
E. Neighboring Communities §201.6(b) (2)
Each of the Partners participated throughout the planning process. Additionally, the governing bodies of each
jurisdictionAreviewedAtheAplanAandAjurisdictionArepresentativesAprovidedAinputAthroughoutAtheAplan’sA
development. Further participation occurred through interviewing multiple public officials and staff members in
their areas of specific expertise (i.e.-public works directors, city engineering staff, the Five Cities Fire Authority
Chief, Community Development Director, City Finance Officers, City Clerks, School District Facilities Manager).
Item 11.b. - Page 16
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 11
Sanitation District.
F. Incorporation of Existing Plans and Other Information § 201.6(b) (3)
At the onset of and throughout the hazard mitigation planning process, all applicable local emergency operations
plans and geotechnical reports were reviewed and incorporated into this mitigation plan. The following sources
were used:
City of Arroyo Grande General Plan
City of Grover Beach General Plan
State Hazard Mitigation Plan
Local and State land use regulations
Flood ordinances
Cities of Arroyo Grande and Grover Beach Drainage Master Plan
Cities of Arroyo Grande and Grover Beach Water Master Plan
City of Arroyo Grande Emergency Operations Plan.
City of Grover Beach Emergency Operations Plan.
Lucia Mar Unified School District Emergency Operations Plan.
Past disaster declarations
Flood Insurance Rate Maps (FIRM’s)
Spill Prevention Control and Countermeasure Plan for the Lucia Mar Unified School District
City of Arroyo Grande, General Plan, Safety element
City of Grover Beach, General Plan, Safety element
South County Sanitation District Emergency Operations Plan
G. Planning Process Development §201.6(c) (1 )
Throughout the planning process, the Project Manager made a concerted effort to gather information from Plan
Partners departments, as well as state and federal agencies, the local business community, area residents and
other stakeholders.
The solicited information was from departments, agencies and people with specific knowledge of natural
hazards, and past historical events, as well as planning and zoning codes, ordinances and recent planning
decisions. The hazard mitigation strategies contained in this plan were developed through an extensive planning
process involving the partner Local Hazard Mitigation Revision Planning Groups.
H. Hazard Identification §201.6(c) (2) (i)(ii)
Central California is susceptible to a number of natural hazards. The State of California identifies the following
types of natural hazards that California has encountered since 1950: Agricultural, earthquake, fire, flood,
landslides, volcanoes and extreme weather.
The following natural occurring hazards may impact the plan partners: earthquake, flood (dam failure), fire, and
tsunami. It is unlikely the following natural hazards would impact any of the partners: agricultural, volcanoes,
extreme weather. Natural hazards that have impacted the partners are: earthquake, flood, fire, and tsunami.
Item 11.b. - Page 17
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 12
Sanitation District.
Historical data, catastrophic potential relevance to the partners and the probability and potential magnitude of
future occurrences were all used to reduce and prioritize the natural hazards most relevant to the plan partners.
The specific impacts to each partner will be discussed in detail in their descriptions.
I. Plan Maintenance Monitoring § 201.6(c) (4) (i)
The Project Manager will take responsibility for plan maintenance and implementation. Plan implementation
and evaluation will be a shared responsibility among all Plan Partners. The Local Hazard Mitigation Revision
Planning Groups will meet at least once a year. These meeting will provide an opportunity to discuss the
progress of the Plan Mitigation Measures, and maintain the partnerships that are essential for the sustainability
of the Plan.
J. Implementation Through Existing Plans and Programs §201.6(c)(4)(ii)
The Cities of Arroyo Grande and Grover Beach have established land use planning, development standards,
capital improvement plans, building and fire codes and additional regulatory processes that enable them to
guide and control development in their communities. The South San Luis Obispo County Sanitation District and
the Lucia Mar Unified School District have established capital improvement plans that allows them, as funding is
available, to address Plan Mitigation Measures.
The Cities of Arroyo Grande and Grover Beach will include the Plan into their respective Safety Element of the
Municipal Codes.
The City of Arroyo Grande amended Sections 16.04.070 and 16.44.050 of the Arroyo Grande Municipal Code
regarding Floodplain Management on September 25 2012. The amendment is known as Ordinance Number 646
and is located on page 90 of this plan.
K. Plan Maintenance Community Participation § 201.6(c) (4) (iii)
The Plan Partners are dedicated to involving the public in the review and updates to the Plan. Copies of the Plan
will be available at all Partner Business Offices, and City Halls. The existence and location of the Plan will be
publicized in the local press and partner websites. The site will also contain an email address where the public
can direct their comments. A public meeting will be held after each evaluation or when deemed necessary by
the Local Hazard Mitigation Revision Planning Groups. The meetings will provide the public a forum in which
they can express their concerns, opinions, or ideas about the Plan.
L. Hazard Locations and Impacts § 201.6(c) (2)(i)
The type and locations of natural hazards impacting the Plan participants are located in the individual Plan
participants Hazard Maps.
M. National Flood Insurance Program (NFIP)
The cities of Arroyo Grande and Grover Beach are participants in the National Flood Insurance Program. The
Arroyo Grande CID # is 060305. The City of Grover Beach CIS # is 060306. There are no repetitively flood
damaged structures in Arroyo Grande or Grover Beach.
The Lucia Mar Unified School District and the South San Luis Obispo County Sanitation District participate in the
National Flood Insurance Program as special districts within the County of San Luis Obispo County Government.
The CID # is 060304.
Item 11.b. - Page 18
Multi-Jurisdictional Local Hazard Mitigation Plan
Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 13
Sanitation District.
There have been no repetitively flood damages structures in the Lucia Mar Unified School District or the South
San Luis Obispo County Sanitation District
N. National Flood Insurance Program (NFIP) continued participation and compliance
All Plan participants will continue to participate and remain in compliance with the National Flood
Insurance Program. (NFIP)
O. Hazard Profiles
All Plan partners are susceptible to the following natural occurring hazards:
a. Earthquake
b. Flood Dam Failure
c. Wildfire
d. Tsunami
The impacts of each hazard to the Plan partners vary. The impacts are discussed in detail within the
individual partner ’s community description.
a. Earthquake
History
1934, 1966 and 2004 Parkfield Earthquakes. These earthquakes had magnitudes of 6.0 and 5.5, respectively, and
occurred on the San Andreas Fault in or near the northeast corner of San Luis Obispo County, approximately 75
miles north east of the Plan area. Earthquake intensities generally conformed to anticipated characteristics for
events of this size, with intense shaking (VII-VIII) being limited to a relatively small area near the epicenters of the
quakes. Moderate shaking was experienced in most of the central and western parts of San Luis Obispo County.
2003 San Simeon Earthquake . The San Simeon Earthquake struck at 11:15 a.m. on December 22, 2003. The
magnitude 6.5 earthquake is attributed to having occurred near the San Simeon/Oceanic/Hosgri Fault system.
The epicenter was approximately six miles from the community of San Simeon.
Future Probability
There are a number of active or potentially active fault systems throughout the county and given the past
history of earthquakes in the area, experts agree that the probability of a damaging earthquake occurring is
high.
Risk Assessment
The greatest threat to these cities, the school district and the sanitation district from a natural hazard is that of a
significant earthquake. Based on the past history of damaging earthquakes and the fact that the Plan area is
located within a seismically active region, the probability is rated MEDIUM. Given the properties at risk and the
ca scading effects the severity is rated as HIGH.
b. Flood/Dam Inundation
Flood History
Over the years, the study area has experienced severe flooding events that have resulted in extensive property
damage. Historical floods include:
Item 11.b. - Page 19
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Sanitation District.
March, 2001. Central and Southern California was significantly impacted by a powerful storm that delivered up
to 6 inches of rain in some of the coastal areas of San Luis Obispo County. The mountain area of the county
received even more, with reports of up to 13 inches. The heavy rain produced numerous flooding incidents
throughout the County. Flooding occurred along Corbett Creek in Arroyo Grande damaging 4 homes.
Additionally, Arroyo Grande High School had 5 classrooms flooded when Arroyo Grande Creek overflowed.
Further downstream a levee broke on the south side of the channel, flooding hundreds of acres of farmland and
several residences. If the northern levee had broken more homes and a wastewater treatment plant would
have been flooded.
December, 2004. A quick moving and powerful storm brought flash flooding and heavy rain to the Central Coast
of California. Rainfall amounts ranged from 1 to 3 inches on the coastal plains to 3 to 6 inches in the more
mountainous regions of the county. Flooding problems were reported in the Plan area.
December 2010.
The Plan Area experienced substantial rains over a short period of time causing local residential flooding and the
topping of area water retention basins. The governor declared a local state of emergency.
Dam Failure
Although the probability of this type of hazard occurring is highly unlikely, it warrants consideration because a
considerable portion of the study area is located in the inundation area of Lopez Dam. In the event of complete
failure of Lopez Dam, water would flow in a westerly direction following Arroyo Grande Creek, approximately
3,000 feet in each direction of the centerline of the creek channel. Water flows would pass through the rural
areas directly below the dam and then into the Cities of Arroyo Grande, Grover Beach, some schools within the
Lucia Mar Unified School District and the Sanitation District before reaching the ocean. Substantial impacts to
life and property are a significant possibility in the City of Arroyo Grande. The threat diminishes as the distance
from the dam increases and as the flood plain widens as it approaches Grover Beach. In Grover Beach, the
general area of inundation, if the dam were at full capacity and experienced a total failure, the low lying areas
south of Grand Avenue and west of Highway 1 would be impacted.
The State of California Division of Safety of Dams conducts periodic reviews to evaluate dam safety and a
considerable amount of work was completed in 2004 in order to bring the dam into compliance with current
seismic standards.
Future Probability
Areas with a past history of flooding have a high probability of future flooding during a potential Lopez Dam
failure.
Risk Assessment
The study area has a significant history of flooding and therefore has received a HIGH probability rating. Areas
that have flooded in the past are likely to flood in the future. Because a considerable amount of resources have
already been expended toward resolving flood issues in these areas and because of the minimal threat to loss of
life, flooding has been deemed a MODERATE risk.
Areas of greatest concern for Arroyo Grande are the convergence of Tally Ho and Corbett Canyon Creeks, the
downtown area, and the agricultural areas near Hwy. 101. In Grover Beach, the Arroyo Grande creek stream
bed widens diminishing the threat of flooding from this creek. A separate Grover Beach flood concern is the
Meadow Creek area near Fourth Street where the creek terminates into the ocean. The only flood concern for
the School District is the location of the Arroyo Grande High School in the low lying areas of Arroyo Grande
Creek.
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One significant and persistent challenge facing the Cities of Arroyo Grande and Grover Beach is their inability to
manage flood control issues upstream on properties where they have no authority. In an effort to resolve this
problem, a special Resource Conservation District-Zone 1/1A was established. In 2003, a series of storms
demonstrated the need for this Flood Control District to initiate additional flood control measures.
c. Tsunami
History
In Crescent City, California, in 1964, tsunami waves of up to 20 feet, a result of an Alaskan earthquake, caused
over 11 million dollars in property damage and resulted in 11 deaths. The impact of this tsunami was also felt in
Morro Bay with damage to docks and fueling stations, yet not in Grover Beach.
PG&E (1973) suggested that faults in the offshore area could generate tsunami wave heights as great as six feet.
The historic record shows local tsunamis have resulted from distant sources. Houston and Garcia in a 1978 study
estimated the Cayucos/Morro Bay coastline 100- and 500-year tsunami run-ups, based on distant source
generation (such as the Aleutian or Chile-Peru Trenches), and are approximately 9.5 feet to 24.2 feet,
respectively. Those run-ups were calculated using astronomical high tides, and are consistent with recorded
tsunamis that have occurred in Crescent City and other locations along the California coast. However, according
to Kilbourne and Mualchin (1980), the worst case scenario would occur if a tsunami occurred during a
meteorological tide (storm surge), which would add an estimated 14.5 feet to the run-up calculated by Houston
and Garcia. Thus, with a worst case scenario, the estimated tsunami run-up for the 100-year and 500-year event
would be no greater than 50 feet above mean sea level.
Fukushima 2011
The Plan area was impacted by the Fukushima Earthquake and subsequent Tsunami. The Tsunami warning for
the Plan was issued. Low lying areas were evacuated in anticipation of the Tsunami making land. The Tsunami
arrived at low tide and as such no inundation was experience by the Plan area.
Future Probability
Large tsunamis have not been common on the Central Coast of California. Few incidences have been recorded
and the historical record is not extensive enough to develop accurate reoccurrence predictions. The potential
tsunami hazard for the Plan area coastal areas is greatest for those communities or portions of communities
located below the estimated elevation 50 feet above mean sea level. In general, much of the Plan area is
protected from tsunami hazards by wide beaches, or coastal dunes, which provide protection for coastal
developments. Coastal developments most vulnerable to the tsunami hazards are those located near mouths of
streams that drain into the Pacific Ocean. The potential for damage to coastal structures would likely increase if
the tsunami event were to coincide with a high tide, storm related waves, or large winter storm runoff.
Risk Assessment
The Plan area has had minimal threat from tsunami activity. The probability of this hazard event is deemed low.
The combination of the following factors also gives this natural hazard a low severity rating: 1) The accurate
tsunami warning system in place, 2) The limited territory exposed, and 3) The wide beaches backed by tall sand
dunes which resultantly reduces the areas vulnerability from this hazard and provides time for evacuation.
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d. Wildfire
Histo ry
Wildland fires in San Luis Obispo County have burned thousands of acres and caused considerable property loss
with an occasional life loss. The majority of these large fires have occurred in the northern and central portions
of the county. Large fires on the coastal side of the county occur less frequently .
Future Probability
The Plan area is located on the western coastal fringe of the Santa Lucia Mountain Range and is in a fairly
favorable position with respect to wildland fire threat. The mild coastal summers characterized by cool
temperatures and foggy days and nights help to maintain the fuel moisture levels to a point that limits the
potential for rapid fire spread. In addition, the majority of the topography is level and well developed in both
residential and agricultural land uses.
Risk Assessment
The majority of the Plan area is not threatened by wildfire. Certain locations in the City of Arroyo Grande do
have the correct combination of fuels and topography to allow an unchecked wildfire to become quite a threat.
However, the strong coastal weather influence diminishes this hazard much of the time.
P. Cost Benefit Analysis §201.6(c)(3)(iii)
Economic analysis of Hazard Mitigation strategies provides an understanding of the potential benefits and costs
of an activity, as well as a basis upon which to compare alternative projects. This approach allowed Plan
Partners to develop a Cost to Benefit analysis of the hazards most likely to impact their jurisdiction. The Cost to
Benefit process was used to show if the benefits to life and property protected through mitigations efforts
exceeded the cost of the mitigation activity. The analysis is based on calculating the frequency and severity of a
hazard, and avoiding future damages.
All costs and benefits were evaluated in terms of dollars. If the net benefit exceeded the net costs, the project
will be approved.
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III. COMMUNITY DESCRIPTIO NS
CITY OF ARROYO GRANDE:
A. Development History
The earliest inhabitants of Arroyo Grande Valley were the northern or Obispena Chumash Indians. The Arroyo
Grande area was still occupied by Chumash Indians at the time of contact with the first Spanish explorer, Juan
Cabrillo. During the colonial settlement of California, the Arroyo Grande Valley became separated into two
major ranchos granted by the Mexican government aroun d 1840. Francisco Zeba Branch first visited the Arroyo
Grande area in 1832. He bought nearly 17,000 acres and launched a successful cattle business. In the mid
1860's, a severe drought decimated the cattle population, forcing the large ranchos to sell sm aller parcels to
new settlers for agriculture uses. Branch began to sell parcels of his vast holdings to settlers. The Village of
Arroyo Grande developed to serve them.
In 1862, the San Luis Obispo Board of Supervisors established the township of Arroyo Grande. By 1876, there
were 35 families and the farm -based community began to flourish. A railway depot was established in 1882. On
July 10, 1911 residents voted to incor porate the City of Arroyo Grande. From the beginning businesses were
established along a road appropriately named Branch Street. Source: The City of Arroyo Grande Local History 2005
B. Geography
Arroyo Grande is a small coastal town with historic, suburba n and rural element located mid -way between Los
Angeles and San Francisco on US Highway 101. Arroyo Grande is located at 35°7'15" North, 120°35'12" West
(35.120878, -120.586799 ) GR1 . According to the United States Census Bureau , the city has a total area of 15 km²
(5.8 mi²), all of it land.
C. Demographics
The 2010 United States Census reported that Arroyo Grande had a population of 17,252. The population density
was 2,956.5 people per square mile (1,141.5/km²). The racial makeup of Arroyo Grande was 14,710 (85.3%)
White , 156 (0.9%) African American , 125 (0.7%) Native American , 595 (3.4%) Asian , 14 (0.1%) Pacific Islander ,
856 (5.0%) from other races , and 796 (4.6%) from two or more races. Hispanic or Latino of any race were 2,707
persons (15.7%).
The Census reported that 17,078 people (99.0% of the population) lived in households, 62 (0.4%) lived in non-
institutionalized group quarters, and 112 (0.6%) were institutionalized.
There were 7,628 households, out of which 2,027 (28.6%) had children under the age of 18 living in them, 3,741
(52.8%) were opposite-sex married couples living together, 653 (9.2%) had a female householder with no
husband present, 275 (3.9%) had a male householder with no wife present. There were 346 (4.9%) unmarried
opposite-sex partnerships , and 42 (0.6%) same-sex married couples or partnerships . 1,968 households (27.8%)
were made up of individuals and 1,017 (14.4%) had someone living alone who was 65 years of age or older. The
average household size was 2.41. There were 4,669 families (65.9% of all households); the average family size
was 2.93.
The population was spread out with 3,633 people (21.1%) under the age of 18, 1,193 people (6.9%) aged 18 to
24, 3,704 people (21.5%) aged 25 to 44, 5,229 people (30.3%) aged 45 to 64, and 3,493 people (20.2%) who
were 65 years of age or older. The median age was 45.4 years. For every 100 females there were 92.6 males. For
every 100 females age 18 and over, there were 88.4 males.
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There were 7,628 housing units at an average density of 1,307.2 per square mile (504.7/km²), of which 4,686
(66.1%) were owner-occupied, and 2,401 (33.9%) were occupied by renters. The homeowner vacancy rate was
1.9%; the rental vacancy rate was 4.0%. 11,345 people (65.8% of the population) lived in owner-occupied
housing units and 5,733 people (33.2%) lived in rental housing units.
D. Population and Growth
Arroyo Grande 2010 Data
PEOPLE Arroyo Grande United States
Population 17,252 308,745,538
Pop. Density 17,252/5.45 sqmi= 3166 80
Pop. Change .039% 5.88%
Median Age 45.4 37.6
Household Size 2.41 2.58
RACE Arroyo Grande United States
White 76.9 77.53%
Black .07 12.3 5%
Asian 3.2 3.58%
American Indian .04 0.89%
Other 3.1 5.65%
Hispanic 15.7% 12.73%
FAMILY Arroyo Grande United States
Married, w /children 22.97% 27.90%
Married, no children 33% 31.04%
Si ngle, w/children 5.99% 9.43%
Single, no children 35.33% 30.05%
Divorced 11.5% 7.64%
Separated 1% 2.82%
Widowed 7.41% 7.42%
Now Married 59.25% 57.73%
Never Married 19.59% 24.39%
Sources: U.S. Census
Source: U.S. Census 2010
U. U. S. Census Year Population
1980 11,290
1990 14,622
2000 15,851
2003 16,414
2005 16,500
2010 17,252
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E. Economy
The California Employment Development Department lists Arroyo Grande Hospital, Arroyo Grande High School,
Rabo Bank, and various agricultural farming and marketing organizations are the major employers in Arroyo
Grande.
According to the 2010 U.S. Census, 47.2% of the potential labor force was employed and there was a
9.0% unemployment rate. Of the population over the age of 16, a total of 40.7% were not in the labor force. Of
theAemployedAcivilianApopulation,A20.4%AworkedAinA“Educational,AhealthAandAsocialAservices,”A14.5%AworkedAinA
“RetailAtrade”AandA8.6%AworkedAinA“ rts,Aentertainment,Arecreation,AaccommodationAandAfoodAservices,”AtheA
majorityAofAthoseAfallingAunderA“ ccommodationAandAfoodAservices.”A AtotalAofA17.4%AofAtheAemployedAcivilianA
population was employed by the local, state, or federal government in 2010. However only 0.1% was reported as
working for the government in the industries of agriculture, forestry, fishing, or mining. A total of 2.2% of the
employed civilian population over the ageAofA16AwasAinvolvedAinA“ griculture,Aforestry,Afishing,AandAhunting”A
according to the 2000 U.S. Census.
ECONOMY Arroyo Grande United States
Unemployment Rate 9.0% 8.1 %
Recent Job Growth 2.44% 1.30%
Future Job Growth 15.32% 1.30%
Sales Taxes 8.75% 6.00%
Income Taxes 6.00% 5.02%
Household Income $56,389 $44,684
Income per Cap. $30,422 $24,020
HOUSING Arroyo Grande United States
Apartment Rent $923 $653
Property Tax Rate $7.78 N/A
Median Home Age 26.1 years 27.2 years
Median Home Cost $400,000 $208,500
Home Appreciat ion -6.53% -15.3%
Homes Owned 66.1% 64.07%
Homes Rented 33.9% 21.45%
Housing Vacant 1.9% 14.48%
Sources: U.S. Census 20 10
HOUSING UNIT TRENDS IN ARROYO GRA NDE
UNITS IN STRUCTURE 2000 2010 Percent
Change Number Percent Number Percent
1 -unit, detached 4,516 66.4 5,296 68.2 +17%
1 -unit, attached 590 8.7 639 8.2 +8%
2 to 4 units 493 7.2 367 4.7 -26%
5 to 9 units 181 2.7 286 3.7 +58%
10 to more units 473 7.0 575 7.4 +22%
Mobile home, Boat, RV, van, etc. 553 8.1 606 7.8 +9.5%
Total 6,806 100 7,769 100 +14%
Sources: 2010 information based on U.S. Census, American Community Survey -5 Year Estimates of Selected Housing Characteristics in DP04, accessed June 14, 2012
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TRANSPORT Arroyo Grande United States
Commute Time (minutes) 23.0 27.4
Method of Transportation
Auto (alone) 80.3% 71.32%
Carp ool 10.5% 15.6%
Mass Transit 0.2% 2.5%
Work at Home 5.1% 4.4%
Sources: U.S. Census 2010
COST OF LIVING Arroyo Grande United States
Overall 98 100
Food 105 100
Housing 94 100
Utilities 104 100
Health 103 100
Transportation 102 100
Goods and Services 94 100
Sources: U.S. Census 2010
F. Climate
CLIMATE Arroyo Grande United States
Rainfall (in.) 16.0 36
Snowfall (in.) 0 25
Precipitation Days 44 100
Sunny Days 286 205
Avg. July High 72 86.5
Avg. Jan. Low 42 20.5
Comfort Index (higher=better) 62 44
UV Index 5.3 4.3
Elevation ft. 80 1,060
G. Government
Form of Government: General Law/Council-Manager
H. Land Uses
A land uses element is in effect with well established parameters.
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I. Future Development
Redevelopment and Enhancement Plans
On December 28, 2011, the California Supreme Court upheld Assembly Bill XI 26 (Dissolution Act), terminating
municipal redevelopment agencies and requiring the dissolution of such agencies. The City of Arroyo Grande
created a Successor Agency charged with winding down the affairs of the dissolved Redevelopment Agency. At
this time, planned redevelopment projects are indefinitely on hold.
The East Grand Avenue Enhancement Plan generally includes those properties fronting onto the arterial street,
with the inclusion of some side street property frontages as well. The overall goal of this plan is to improve the
image of the City and spur investment by individual property owners.
Future Development Plans
There is a considerable amount of open and undeveloped land within the City limits of Arroyo Grande. A sizable
portion (349 acres) of this land is currently used for agricultural purposes, as it has high quality soils and is
valued by the community as part of its cultural heritage and profitability. The remainder exists on gently sloping
open areas, more difficult to develop and highly valued for its green belt effects.
In the developed areas there are very few vacant lots or parcels available for new construction. The 2003
Housing Element lists 22 parcels ranging in size that could be developed.
The Arroyo Grande Community Development Department reports several projects are in varying stages of
planning or permit processing.
Approved Projects:
1. A school expansion of 7,300 sq. ft. total has been approved on the Valley View Adventist Academy at
230 Vernon Street, near the Village area.
2. A 36-unit apartment complex on 1.63 acres has been approved on a portion of the vacant property at
the intersection of E. Grand Avenue and South Courtland Street.
3. A new 9,400 sq. ft. retail building has been approved on Pad I-2 of the Five Cities Center Phase II
property fronting West Branch Street and Rancho Parkway.
Projects under Construction:
1. A 30-unit townhouse and ~120,000 sq. ft. medical office project is currently under construction at the
intersection of Fair Oaks Avenue and Woodland Drive. The residential portion of the project has already
been completed and construction of the medical offices is beginning.
2. A 15 single-family home and 4-unit apartment project is currently under construction on 30 acres off of
Grace Lane.
Economic and Historic Resource Considerations:
The City of Arroyo Grande contains several important economic features that could be impacted by potential
hazardsAinAtheAarea.AA rroyoAGrandeACommunityAHospital,AoneAofASanALuisAObispoACounty’sAlargestAemployers,AisA
located at the corner of Fair Oaks Avenue and S. Halcyon Road and is located in a dam inundation zone, as
indicated in the Dam Inundation Zone map. The Five Cities Center is a regional commercial center with tenants
such as Wal-Mart,AOfficeAMax,AMarshalls,ATraderAJoe’s,AandAPetcoAandAisAlocatedAalongAWest Branch Street near
Rancho Parkway. This area is at risk of fire from the nearby Wildland urban interface (WUI) and seismic shaking,
as can be seen in the Fire Risk and Earthquake Fault maps, respectively. The Village of Arroyo Grande is a major
economic and cultural resource for the City located in areas around East Grand Avenue. Several historic
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structures in this area of the City, including the Independent Order of Odd Fellows Hall (128 Bridge Street), Santa
Manuella School House (Short Street), and Old Briscoe Hotel (129 East Branch Street) serve as area attractions
forAresidentsAandAvisitors.AATheseAattractionsAaddAtoAtheACity’sAeconomicAbaseAasAaAresultAofAtouristAspendingAinAtheA
nearby area. Parts of this area are at risk of fire, flood, earthquake shaking, and dam inundation, which can be
seen in the respective hazard maps.
J. Community Specific Hazard Profiles §206.6(c)(2)(i)
Earthquake
Mapped faults within the City of Arroyo Grande are the potentially active Wilmar Avenue fault and the inactive
Pismo fault. The Wilmar Avenue fault is exposed in the sea cliff near Pismo Beach and the buried trace of the
fault is inferred to strike northwest - southeast parallel and adjacent to U.S. Highway 101 beneath portions of
Arroyo Grande. The Wilmar active fault presents a moderate hazard to the City. The inactive Pismo fault
presents a very low hazard.
Flood
Areas of potential 100and 500-year flooding in Arroyo Grande include portions of the creek channels that
traverse the City: Canyon/Meadow Creek on the west side of the City, Corbett Canyon, Tally Ho and Arroyo
Grande Creeks on the east side of the City, and Los Berros Creek in the southeastern portion of the City.
Although inundation areas are generally located along creek channels, adjacent properties could be adversely
affected in isolated areas. Near the convergence of Corbett Canyon and Arroyo Grande Creeks, the 100 and 500-
year floodplain widens and impacts properties between Crown Terrace and Mason Streets. The floodplain along
Arroyo Grande Creek also widens slightly on the north and south sides of Highway 101.
Dam Inundation
Although the probability of this type of hazard occurring is highly unlikely, it warrants consideration because a
considerable portion of the study area is located in the inundation area of Lopez Dam. In the event of complete
failure of Lopez Dam, water would flow in a westerly direction following Arroyo Grande Creek, approximately
3,000 feet in each direction of the centerline of the creek channel. Water flows would pass through the rural
areas directly below the dam and then into the Cities of Arroyo Grande, Grover Beach, some schools within the
Lucia Mar Unified School District and the Sanitation District before reaching the ocean. Substantial impacts to life
and property are a significant possibility in the City of Arroyo Grande. The threat diminishes as the distance from
the dam increases and as the flood plain widens as it approaches Grover Beach. In Grover Beach, the general area
of inundation, if the dam were at full capacity and experienced a total failure, the low lying areas south of Grand
Avenue and west of Highway 1 would be impacted.
The State of California Division of Safety of Dams conducts periodic reviews to evaluate dam safety and a
considerable amount of work was completed in 2004 in order to bring the dam into compliance with current
seismic standards.
Tsunami
Due to the distance and elevation from the ocean, there is no threat to the community of Arroyo Grande. The
impact from a Tsunami affecting the Plan Area would be a population surge as a result to evacuations from
neighboring impacted communities.
Wildfire
Located in the generally flat valley area and surrounded by agricultural uses, the majority of the community is not
threatened by wildfire; however a limited amount of wildland urban interface does exist in the City. The steeper
hillside area such those found in the Miller Way, Methodist Camp and the Wildwood Ranch neighborhoods are
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much more susceptible. Fire fighting activities in these areas may be impacted by a lack of water, limited access,
and heavy fuel beds adjacent to homes.
In 1985 the Los Pilitas Fire burned in the mountains to the north of the City Arroyo Grande with amazing speed.
While this threat was short lived, given the right series of circumstances, the correct combination of weather,
topography and fuel, the potential does exist for a wildland fire to burn into or start within the Plan area.
K. Mitigation Strategies § 201.6 (c)(3)(iv)
The Mitigation Strategies for the City of Arroyo Grande were developed after an analysis of the potential
frequency of occurrence of the hazard and the potential fiscal impact. After careful analysis the listed hazards
were selected with the highest probability of occurrence with the maximum fiscal impact.
Mitigation activities reduce the cost of disasters by minimizing property damage, injuries, and the potential for
loss of life, and are reducing emergency response costs, which would otherwise be incurred.
The implementation and administration of the Mitigation Strategies are the responsibility of the listed
department located in the Mitigation Action Goals.
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City of Arroyo Grande Mitigation Action
(a) Goal 1. Minimize the level of damage and losses due to flooding.
Objective: Research and identify flooding vulnerab i l ity of r esidential, c ommercial and local government
within the City of Arroyo Grande.
Mitigation Project: Residential -Commercial -Government Floodsmart projects.
Proposed Mitigation Actions:
Residential: relocate, revise building codes, and provide mitigation
assistance.
Commercial: relocate, revise codes, and provide mitigation assistance.
Conduct a Cost to benefit analysis to consider expanding the capacity
of the retention basins at various locations in the City of Arroyo
Grande .
Creation of Bio -Swales for water conservation.
Determine cost effective m itigation strategies for Newsom Springs
area.
Conduct a Cost to Benefit analysis of a flood water diversion system
for the City of Arroyo Grande ’s Crit ical Infra -structure and the flood
vulnerable Commercial District.
Conduct a Cost Benefit Analysis for the design and construction of
creek restoration and enhancement improvements to Tally Ho Creek
to reduce flooding potential.
Special Environmental Endangered habitats
Impacts to surrounding area
Implementation Responsibility : Recreation and Maintenance Services
Community Development
Emergency Preparedness
Time Line : 5 years
Funding Source : PDM Grant, General Funds , Capital Improvement funds, Staff time
Resources Required: To be determined
Priority: H -M -L
P rogress on Mitigation Actions 2013 -- 2017:
2013: Apply for Pre -Disaster Mitigation Grant
2014: Commence Mitigation projects
2015: Conclude Mitigation projects
2016: Monitor and record ef fectiveness of Mitigation Actions
2017: Evaluate effectiveness of Mitigation Actions
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City of Arroyo Grande Mitigation Action
(b) Goal 2. Minimize the level of damage and losses due to earthquakes
Objective: 1 . Research and confirm Earthquake faults impacting the City of Arroyo Grande.
2. Use United States Geologic Survey and Cal EMA resources for determining Earthquake
Faults in Arroyo Grande.
3. Condu ct a Seismic Retrofit Cost/Benefit Analysis of vulnerable structures
In Arroyo Grande.
Mitigation Project: Earthquake fault identification and Seismic Retrofit projects.
Proposed Mitigation Actions:
Identify and catalog seismically vulnerable structures.
Notify public of location of earthquake faults.
Notify public of location of Seismic vulnerable structures .
Special Historical Concerns: Identify and catalog buildings registered with the National Historic
Register .
Implementation Responsibility: Emergency Preparedness
Time Line: 5 years
Funding Source : PDM Grant, General Funds, Capital Improvement funds, Staff
Time
Resources Required: To be determined
Priority: H -M -L
Schedule of Mitigation Actions 2013 -- 2017:
2013: Apply for Pre -Disaster Mitigation Grant
2014: Commence Mitigation projects
2015: Conclude Mitigation projects
2016: Monitor and record effectiveness of Mitigation Actions
2017: Evaluate effectiveness of Mitigation Actions
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City of Arroyo Grande Mitigation Action
(c) Goal 3. Minimize the level of damage and losses to people due to Wildland and Structure Fires .
Objective: 1. Educate the public to maximize compliance with Fire Safe Community guidelines .
Mitigation Project: Create a Fire -Smart Community by developing a comprehensive approach to
reducing damage and loss due to fires.
Proposed Mitigation Actions:
EncourageAtheA100’ADefensibleASpaceAar ound structures in the
Wildland Urban Interface.
C ontinue weed abatement program
Enforce building codes and ordinances that eliminate the use of wood
shake roofs.
Enforce codes and ordinances that require fire sprinkler systems in all
new structures constructed .
Environmental Ri parian Habitats
Implementation Responsibility: Fire Department , Community Development
Time Line: 5 Years
Funding Source: California Fire Safe Council, General Fund, Fire Prevention Grant ,
PDM Grant, Staff time
Resources Required: To be determined
Priority: H -M -L
Schedule of Mitigati on Actions 2013 -- 2017:
2013: Develop comprehensive Fire Prevention program.
2014: Apply for grant funding.
2015: Commence education and action programs.
2016: Monitor and record effectiveness of Mitigation Actions.
2017: Evaluate effectiveness of Mitigation Actions.
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Sanitation District.
City of Arroyo Grande Mitigation Action
(d) Goal 4. Minimize impacts to community from Dam Inundation events.
Objective: Prepare Community for a Lopez Dam Inundation event.
Mitigation Project: 1 . Create an Evacuation Plan using the cities dam inundation map.
2. Locate gathering locations outside the dam inundation zone.
Proposed Mitigation Actions: 1. Create a community specific Evacuation Plan
2 . Exercise Evacuation Plan for effectiveness.
3. Revise Evacuation Plan as appropriate.
Special Environmental None
Implementation Responsibility : Emergency Preparedness /Arroyo Grande Police Department
Time Line: 5 Years
Funding Source : PDM Grant, General Funds, Capital Improvement funds, Staff time
Resources Required: To be determined
Priority: H -M -L
Schedule of Mitigation Actions 2013 -- 2017:
2013: Apply for Pre -Disaster Mitigation Grant
2014: Commence Mitigation projects
2015: Conclude Mitigation projects
2016: Monitor and record effectiveness of Mitigation Actions
2017: Evaluate effectiveness of Mitigation Actions
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Sanitation District.
L. Property Schedule City of Arroyo Grande
Category Property Location Sq.ft . Value
Government
City Hall 300 E. Branch St. 6051 $2,046,291
City Hall Annex 214 E. Branch St. 3878 871,830
Council Chambers 215 E. Branch St. 3158 415,484
Public Safety
Fire Station 140 Traffic Way 13,000 5,397,441
Police Headquarters 200 N. Halcyon 7036 2,626,253
Police Storage 200 N. Halcyon 600 65,329
Community Facilities
Community Center 211 Vernon 4773 621,321
Corp. Yard Maintenance Bldg. 1375 Ash St. 4800 638,206
Corp. Yard Equipment Bldg. 1375 Ash St. 7000 494,586
Storage and Chemical Garage 1375 Ash St. 5672 471,039
Public Restroom 200 E. Branch St . 390 65,953
Heritage Square Park 205 Nelson St. - 2,492
Heritage Park Bandstand 205 Nelson St. - 16,394
Swinging Bridge 200 E. Branch - 95,332
Potable Water
and
Wastewater Facilities
Elm St. Park Well House # 1 1221 Elm St. - 20,603
Elm St. Park Control House # 2 1221 Elm St. 224 21,636
Elm St Park Well House # 1 1221 Elm St. 160 50,891
Elm St. Park Well House # 1 1221 Elm St. 180 73,346
Elm St. Park Well House # 1 1221 Elm St. 168 108,225
Lift Station Tiger Tail - 45,133
Lift Station 612 Taylor Place - 45,133
Lift Station Oak Park Blvd. - 188,288
Lift Station Leanna Dr. - 110,080
Lift Station Huasna Rd. - 99,513
Husana Rd. Yard & Outside Husana Rd. - 3,133
Booster Pump Station Bldg. Lower Miller Way - 6,025
Booster Pump Station Bldg. Upper Miller Way # 1 - 14,556
Booster Pump Station Bldg. Upper Miller Way # 2 - 14,088
Booster Pump Station Bldg. 311 Oro Drive - 37,580
Reservoir # 1 300 Reservoir Rd . - 555,376
Reservoir # 1 Inlet Bldg. 300 Reservoir Rd . - 10,687
Reservoir # 1 Radio Bldg. 300 Reservoir Rd . - 13,076
Reservoir # 1 Yard and Outside Fence 300 Reservoir Rd . - 18,880
Reservoir # 2 200 Hillcrest Dr. - 438,808
Reservoir # 2 Emergency Light Bldg 200 Hillcrest Dr - 38,745,
Reservoir # 2 Booster Pump Station 200 Hillcrest Dr - 61,774
Reservoir # 2 Valve Pit 200 Hillcrest Dr. - 5,368
Reservoir # 2 Yard and Outside Fence 200 Hillcrest Dr. - 21,974
Reservoir # 3 Stagecoach Rd - 100,353
Reservoir # 3 Yard and Outside Fence Stagecoach Rd - 5,740
Reservoir # 4 Huebner Lane 614,577
Reservoir # 4 Valve Pit Huebner Lane - 3,968
Reservoir # 4 Yard and Outside Fence Huebner Lane - 23,757
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Sanitation District.
City of Arroyo Grande Property Schedule (continued)
C ategory Property Location Sq. Ft. Value
Recreation
Pre -School 126 Mason St 1,444 213,085
Recreation Building 1221 Ash St. 534 369,437
Soto Sports Complex Office 1275 Ash St. 2,304 369,434
Soto Sports Complex Rest Rooms 1275 Ash St. 398 77,788
Elm Street Park Gazebo 1221 Ash St. - 20,603
Strother Park Rest Room 1150 Huasna Rd. - 86,167
Critical Infrastructure Water Systems Various -
Primary Roadways Various -
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Sanitation District.
M. City of Arroyo Grande Hazard Impact to Vulnerable Structures and Infrastructure
Critical Structures and Infrastructure Potentially Impacting Hazards
Category Property Location Earthquake Flood
Wild
Fire
Dam
failure
Government
City Hall 300 E. Branch X X X X
City Hall Annex 214 E. Branch X X X X
Council Chambers 215 E. Branch X X X X
Public Safety
Fire Station 140 Traffic Way X X X X
Police HQ 200 N. Halcyon X
Police Storage 200 N. Halcyon X
Community
Facilities
Community Center 211 Vernon X X X
Corporate Yard & Maintenance 1375 Ash St. X X
Corporate Yard Equipment Bldg 1375 Ash St X X
Public Restroom 200 E. Branch X X X X
Heritage Square Park 205 Nelson St. X X X X
Heritage Park Bandstand 205 Nelson St. X X X X
Swing Bridge 200 E. Branch X X X X
Potable Water
and
Wastewater
Facilities
Elm St. Park Well House # 1 1221 Elm St. X X
Elm St. Park Control House #2 1221 Elm St. X X
Elm St. Park Well House # 1 1221 Elm St. X X
Elm St. Park Well House # 1 1221 Elm St. X X
Elm St. Park Well House # 1 1221 Elm St. X X
Lift Station Tiger Tail X X X
Lift Station # 5 612 Taylor Pl. X X
Lift Station Poplar St. X
Lift Station Oak Park Blvd. X
Lift Station Leanna Dr. X X
Lift Station # 3 Husana Rd. X X X
Husana Road and Yard & Outside Husana Rd. X X
Booster Pump Station Bldg. Lower Miller Way X X
Booster Pump Station Bldg. Upper Miller Way # 1 X X
Booster Pump Station Bldg. Upper Miller Way # 2 X X
Booster Pump Station Bldg. 311 Oro Drive X X X
Reservoir # 1 300 Reservoir Rd. X
Reservoir # 1 Inlet Bldg. 300 Reservoir Rd. X
Reservoir # 1 Radio Bldg. 300 Reservoir Rd. X
Reservoir # 1 Yard & Outside Fence 300 Reservoir Rd. X
Reservoir # 2 200 Hillcrest Dr. X
Reservoir # 2 Yard & Outside Fence 200 Hillcrest Dr. X
Reservoir # 2 Valve Pit 200 Hillcrest Dr. X
Reservoir # 2 Booster Pump Bldg. 200 Hillcrest Dr. X
Reservoir # 2 Emergency Light Bldg. 200 Hillcrest Dr. X
Reservoir # 3 Stagecoach Rd. X X
Reservoir # 3 Yard & Outside Fence Stagecoach Rd. X X
Reservoir # 4 Huebner Lane X X
Reservoir # 4 Valve Pit Huebner Lane X X
Reservoir # 4 Yard & Outside Fence Huebner Lane X X
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City of Arroyo Grande Hazard Impact to Vulnerable Structures and Infrastructure (continued)
Critical Structures and Infrastructure Potentially Impacting Hazards
Category Property Location Earthquake Flood Wild
F ire
Dam
failure
Recreation
Pre -School 126 Mason St X X X X
Recreation Building 1221 Ash St. X X
Soto Sports Complex Office 1275 Ash St. X X
Soto Complex Rest Rooms 1275 Ash St. X X
Elm St. Park Gazebo 1221 Ash St. X X
Strother Park Rest Room 1150 Husana Rd. X X X X
Critical
Infrastructure
Water System Various X X X X
Roadways Various X X X X
Arroyo Grande Community Hospital X X X X
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Sanitation District.
N. City of Arroyo Grande Loss Estimate to Vulnerable Properties and Infrastructure
Category Property Location 100% 50% 25%
Government
City Hall 300 E. Branch St. $2,046,291 $1,023,146 $511,573
City Hall Annex 214 E. Branch St. 871,830 435,915 217,958
Council Chambers 215 E. Branch St. 415,484 207,742 103,871
Public Safety
Fire Station 140 Traffic Way 5,397,441 2,698,721 1,349,360
Police HQ 200 N. Halcyon 2,626,253 1,313,127 656,563
Police Storage 200 N Halcyon 65,329 32,665 16,332
Community
Facilities
Community Center 211 Vernon 621,321 310,661 155,330
Corporate Yard Maintenance Bldg. 1375 Ash St. 638,206 319,103 159,952
Corporate Yard Equipment Bldg 1375 Ash St. 494,586 247,293 123,647
Storage and Chemical Garage 1375 Ash St. 471,039 235,520 117,760
Public Restroom 200 E. Branch St 65,953 32,977 15,488
Heritage Square Park 205 Nelson St. 2,492 1,246 632
Heritage Park Bandstand 205 Nelson St. 16,394 8,197 4,099
Swinging Bridge 200 E. Branch 95,332 47,666 23,833
Potable Water
And
Wastewater
Facilities
Elm St. Park Well House #1 1221 Elm St. 20,603 10,302 5,151
Elm St. Park Control House #2 1221 Elm St. 21,636 10,818 5,409
Elm St. Park Well House #1 1221 Elm St. 50,891 25,446 12,723
Elm St. Park Well House #1 1221 Elm St. 73,346 36,673 18,337
Elm St. Park Well House #1 1221 Elm St. 108,225 54,113 27,056
Lift Station Tiger Tail 45,133 22,567 11,283
Lift Station 612 Taylor Pl. 45,133 22,567 11,283
Lift Station Poplar St. 31,236 15,618 7,809
Lift Station Oak Park Blvd. 188,288 94,144 47,072
Lift Station Leanna Dr. 110,080 55,040 27,520
Lift Station Huasna Rd. 99,513 49,757 24,878
Huasna Road Yard & Outside Husana Rd. 3,133 1,567 783
Booster Pump Station Bldg Lower Miller Way 6,025 3,013 1,506
Booster Pump Station Bldg # 1 Upper Miller Way 14,556 7,278 3,639
Booster Pump Station Bldg # 2 Upper Miller Way 14,088 7,044 3,522
Booster Pump Station Bldg 311 Oro Drive 37,580 18,790 9,395
Reservoir#1 300 Reservoir Rd. 555,376 277,688 138,844
Reservoir #1 Inlet Bldg. 300 Reservoir Rd. 10,687 5,344 2,672
Reservoir #1 Radio Bldg. 300 Reservoir Rd. 13,076 6,538 3,269
Reservoir #1 Yard & Outside Fence 300 Reservoir Rd. 18,880 9,440 4,720
Reservoir #2 200 Hillcrest Dr. 430,808 215,404 107,702
Reservoir#2 Emergency Light Bldg. 200 Hillcrest Dr . 38,745 19,373 9,686
Reservoir #2 Booster Pump Station 200 Hillcrest Dr . 61,774 30,887 15,444
Reservoir #2 Valve Pit 200 Hillcrest Dr . 5,368 2,684 1,342
Reservoir #2 Yard & Outside 200 Hillcrest Dr . 21,974 10,987 5,494
Reservoir #3 Stagecoach Rd. 100,353 50,177 25,088
Reservoir #3 Yard & Outside Fence Stagecoach Rd. 5,740 2,870 1,435
Reservoir #4 Huebner Lane 614,577 307,289 153,644
Reservoir #4 Valve Pit Huebner Lane 3,968 1,984 992
Reservoir # 4 Yard & Outside Fence Huebner Lane 23,757 11,879 5,939
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O . City of Arroyo Grande Loss Estimate to Vulnerable Properties and Infrastructure (continued)
Category Property Location 100% 50% 25%
Recreation
Pre -School 126 Mason 213,085 106,543 53,271
Recreation Building 1221 Ash St. 369,437 184,719 92,359
Soto Sports Complex Office 1275 Ash St. 369,434 184,717 92,359
Soto Sports Complex Rest Rooms 1275 Ash St. 77,788 38,894 9724
Elm Street Park Gazebo 1221 Ash St. 20,603 10,302 5,151
Strother Park Rest Room 1150 Huasna Rd. 86,167 43,084 21,542
Critical
Infrastructure
Water Systems Various 16 mil 8mil 4 mil
Roadways Various 80 mil 40 mil 20 mil
P. Hazards and Zoning Maps
a. Flood Risk
b. Earthquake Fault Risk
c. Fire Risk
d. Dam Inundation Zone
e. Zoning District
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IV. CITY OF GROVER BEACH:
A. Development History
On August 1, 1887, Dwight William Grover filed plans at the San Luis Obispo County Court House and founded
what would become the City of Grover City. For this land, he paid $22,982.20 in gold to John Michael Price, the
founder of Pismo Beach. Mr. Grover thus founded the Town of Grover. He had a vision of a community which
included a hotel and railroad station near the beach and promoted his town as "the place where the tide lands
and the rails meet".
In the 1890's, Mr. Grover attempted to have a train station built in the Town of Grover, in order to attract
tourists and investors. Unfortunately, the Southern Pacific constructed the sought after station in nearby
Oceano, an unincorporated town in San Luis Obispo County.
D.W. Grover laid out streets in a grid pattern, naming them for popular beaches of the time and set aside land
for a train depot, a hotel and a city park, hoping to foster commercial growth. A land auction was held on August
1, 1887. Grover and his partner, George Gates, promoted Grover City as the "grandest summer and winter
seaside resort on the Pacific Coast". Over the ensuing years, D.W. Grover made numerous attempts at making
his city a reality and the cause of the city bearing his name would be picked up by other men.
The seeds of development didn't flourish as planned until many years later when Horace V. Bagwell came north
in 1935 and bought about 1,100 acres. He advertised Grover City as the "home of the average man", with land
prices in the working man's range. Word began to spread and so did development. In the mid-1940's, the first
store opened followed by the first post office. In 1949, the Fair Oaks Fire District and the Grover City Water
District were formed followed by a building boom in the early 1950's.
The little town grew in numbers and progressed in development until in 1959 the majority of residents wanted
to make the "city" a reality. An incorporation election was held on December 21, 1959.
As the city boundaries were laid out shortly after incorporation, the groundwork was also laid for more growth
and development. The city grew steadily in the decades to follow, and in the mid-1970's, development took off
as vacant lots were replaced with restaurants, markets and residences.
In 1992, Grover City was renamed "Grover Beach ". The City now has a population of 13,156 residents (2010
Census) and Mr. Grover's dream of a train station became a reality in November 1996 when Amtrak began rail
service with two daily stops at a newly constructed train station at 150 Grand Avenue on the Pacific Coast
Highway.
Source: City of Grover Beach website: www.grover.org
B. Geography
Grover Beach is located on the beautiful Central Coast of California midway between Los Angeles and San
Francisco. It is one of the major entryways to Pismo State Beach and the Oceano Dunes State Vehicular
Recreational Area.
Grover Beach is located at 35°7'15" North, 120°37'10" West (35.120934, 120.619529). According to the United
States Census Bureau, the city has a total area of 6.0 km² (2.3 mi²). 6.0 km² (2.3 mi²) of it is land and none of it
is covered by water.
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Sanitation District.
C. Demographics
The 2010 United States Census reported that Grover Beach had a population of 13,156. The population density
was 5,684.2 people per square mile (2,194.7/km²). The racial makeup of Grover Beach was 9,964 (75.7%)
White , 146 (1.1%) African American , 186 (1.4%) Native American , 542 (4.1%) Asian , 35 (0.3%) Pacific Islander ,
1,582 (12.0%) from other races , and 701 (5.3%) from two or more races. Hispanic or Latino of any race were
3,840 persons (29.2%).
There were 5,111 households, out of which 1,656 (32.4%) had children under the age of 18 living in them, 2,178
(42.6%) were opposite-sex married couples living together, 735 (14.4%) had a female householder with no
husband present, 335 (6.6%) had a male householder with no wife present. There were 428 (8.4%) unmarried
opposite-sex partnerships , and 54 (1.1%) same-sex married couples or partnerships . 1,330 households (26.0%)
were made up of individuals and 439 (8.6%) had someone living alone who was 65 years of age or older. The
average household size was 2.54. There were 3,248 families (63.5% of all households); the average family size
was 3.04.
In the city the population is spread out with 22.3% under the age of 18, 9.6% from 18 to 24, 29.0% from 25 to
44, 27.4% from 45 to 64, and 11.8% who are 65 years of age or older. The median age is 36.9 years. For every
100 females there are 95.7 males. For every 100 females age 18 and over, there are 93.6 males.
There were 5,748 housing units at an average density of 2,483.5 per square mile (958.9/km²), of which 2,390
(46.8%) were owner-occupied, and 2,721 (53.2%) were occupied by renters. The homeowner vacancy rate was
2.0%; the rental vacancy rate was 3.7%. 5,719 people (43.5% of the population) lived in owner-occupied housing
units and 7,248 people (55.1%) lived in rental housing unit.
D. Population and Growth
Grover Beach 2010 Data
People Grover Beach United States
Population 13,156 308,745,538
Population Density 5,684 87
Population Change .7% 9.34%
Medial Age 36.6 37.2
Household Size 2.54 2.63
Ethnicity Grover Beach United States
White 62.3% 63 .4%
Black 1.1 1 3.1
Asian 4.1 5.0
American Indian 1.4 1.2
Hispanic 29.2 16.7
Other 1.9 .06
Family Grover Beach United States
Married, with children 19.5% 20.2%
Married, without children 26.8% 33.6%
Single, with children 11.4% 7.4%
Single, without children 34.8% 33.5%
Divorced 16.7% 10.6%
Separated 3.4% 4.9%
Widowed 5.6% 6.3%
Now Married 41.22% 47.2%
Never Married 33.11% 33.0%
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Sanitation District.
Population
Year Population
1980 8,827
1990 11,656
2003 12,991
2005 12,887
2010 13,156
E. Economy
Within the City of Grover Beach, the following industries provide the bulk of employment:
Educational,Ahealth,AandAsocialAservicesAprovideA18.5%AofAtheAcity’sAemployment
rts,Aentertainment,Arecreation,AaccommodationAandAfoodAservicesAprovideA14.7%AofAtheAcity’sA
employment
RetailAtradeAprovidesA12.9%AofAtheAcity’sAemployment
22.5% of Grover Beach residents both live and work in the city. The majority of the residents commute
to work.
Economy Grover Beach United States
Unemployment Rate 9.9% 9.1%
Recent Job Growth -.21% -.12%
Future Job Growth 29.68% 31.25%
Sales Tax 7.75% 6.8%
Income Tax 9.30% 6.25%
Household Income 50,123 52,954
Income per Capita 25,533 27,067
Housing Grover Beach United States
Apartment Rent $1,196 $950
Property Tax Rate 7.63% 11.2%
Median Home Age 32.8% 35.1%
Median Home Cost $374,900 $175,00
Home Appreciation -6.77% -3.15%
Homes Owned 45.7% 59.9%
Homes Rented 46.2% 29.73%
Vacant Housing 8.09% 10.37%
Housing Unit trends in Grover Beach
Units in Structure 2000
Number Percent
2009
Number Percent
Percent Change
1 Unit attached 3,060 57.0 3,051 56.4 (03 )
1 Unit detached 784 14.6 811 15.0 3.4
2 -4 Units 701 13.1 711 13.1 0 .0
5 -9 Units 351 6.5 351 6.5 0 .0
10 Units or more 226 4.2 236 4.5 .03
Mobile home, boat, RV, van, etc 246 4.5 246 4.5 0 .0
Total 5,368 100 5,406 100 3.4
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Transportation Grover Beach United States
Commute Time (minutes) 20.1 27.7
Method of Transportation
Auto 7 6.42 % 75.83%
Carpool 17 .22% 14.52 %
Mass Transportation .48% 4.19 %
Work at Home 5 .88% 5.46 %
Cost of Living Grover Beach United States
Overall 126.5% 100%
Food 115.6% 100%
Housing 150% 100%
Utilities 115.6% 100%
Health 134.4% 100%
Transportation 113.9% 100%
Miscellaneous 104.9% 100%
Education Grover Beach United States
School Expenditure $4,972 $5,678
Pupil to Teacher Ration 18.8% 14.9%
Students per Counselor 779 513
F. Climate
G. Government
Form of Government: General Law/Council-Manager
H. Land Uses
A land use element is in effect with well established parameters
I. Future Development
The City of Grover Beach updated its General Plan Land Use Element (LUE) in 2010. The LUE recognizes that
the majority of the City is developed and that future development will occur on the few remaining vacant
properties and the redevelopment of underutilized properties. Commercial redevelopment will be focused
onAWestAGrandA venue,AtheACity’sAmainAcommercialAcorridor,AwithAtheApotentialAforAtwoAandAthreeAstoryA
mixed use projects. Residential in-fill projects will continue to occur throughout the City and consist
primarily of planned unit developments and multi-family residential projects.
Climate Grover Beach United States
Rainfall (in.) 17.1 36.5
Snow (in.) 0 25
Precipitation Days 44 100
Sunny Days 291 205
Avg. July high temperature 70 86.5
Avg. January high temperature 62.3
UV index 5.3 4.3
Elevation 42 1,060
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J. Community Specific Hazard Profiles §206.6(c)(2)(i)
Earthquake
The only mapped fault near Grover Beach is the potentially active Wilmar Avenue fault. The Wilmar Avenue
fault is exposed in the sea cliff near Pismo Beach and the buried trace of the fault is inferred to strike northwest-
southeast generally along the alignment of U.S. Highway 101 past Grover Beach. The mapped location of the
fault runs along a portion of the northern city limits for Grover Beach. The Wilmar Avenue fault is considered
potentially active and presents a moderate hazard to the City.
Flood
In general, flooding is not a major life loss threat to this community. Arroyo Grande Creek, which is the only
major drainage that can threaten the City, can present varying hazards during a flood and can block access to and
egress from portions of the City. South Grover Beach and West Grover Beach neighborhoods can experienc e
flooding issues. Most other areas of the City will present only minor flooding problems.
Dam Inundation
Although the probability of this type of hazard occurring is highly unlikely, it warrants consideration because a
considerable portion of the study area is located in the inundation area of Lopez Dam.
In the event of complete failure of Lopez Dam, water would flow in a westerly direction following Arroyo Grande
Creek, approximately 3,000 feet in each direction of the centerline of the creek channel. Water flows would pass
through the rural areas directly below the dam and then into the Cities of Arroyo Grande, Grover Beach, some
schools within the Lucia Mar Unified School District and the Sanitation District before reaching the ocean.
Substantial impacts to life and property are a significant possibility in the City of Arroyo Grande. The threat
diminishes as the distance from the dam increases and as the flood plain widens as it approaches Grover Beach.
In Grover Beach, the general area of inundation, if the dam were at full capacity and experienced a total failure,
the low lying areas south of Grand Avenue and west of Highway 1 would be impacted.
The State of California Division of Safety of Dams conducts periodic reviews to evaluate dam safety and a
considerable amount of work was completed in 2004 in order to bring the dam into compliance with current
seismic standards.
Tsunami
In general, portions of coastal Grover Beach are protected from tsunami hazards by wide beaches and coastal
dunes. The only exception to this is the low lying areas where Meadow Creek meets the Pacific Ocean.
Specific at risk locations within Grover Beach include the following:
Five Cities Drive/El Camino Real
Margarita Avenue from 4th Street to Oak Park.
2nd Street to the Ocean
6th Street to the Ocean from Brighton to Manhattan
14th Street to the Ocean from Manhattan to the Pike.
West Grand Avenue from 2nd Street to Oceano, including Pismo State Beach Golf Course.
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Sanitation District.
Wildfire
The community is not confronted with a significant wildfire hazard because of its location on the coast away from
vegetated hillsides. The high humidity levels and cool ocean temperatures minimize the potential for wildfire
activity. A limited number of open areas containing annual grasses exist throughout the City. These light fuels do
not represent a major wildfire risk.
K. Mitigation Strategies §201.6(c)(3)(iv)
The Mitigation Strategies for the City of Grover Beach were developed after an analysis of the potential
frequency of occurrence of the hazard and the potential fiscal impact. After careful analysis the listed hazards
were selected with the highest probability of occurrence with the maximum fiscal impact.
Mitigation activities reduce the cost of disasters by minimizing property damage, injuries, and the potential for
loss of life, and are reducing emergency response costs, which would otherwise be incurred.
Mitigation activities reduce the cost of disasters by minimizing property damage, injuries, and the potential for
loss of life, and are reducing emergency response costs, which would otherwise be incurred.
The implementation and administration of the Mitigation Strategies are the responsibility of the listed
department located in the Mitigation Action Goals.
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Sanitation District.
(a) City of Grover Beach Mitigation Action
Goal 1. Minimize the level of damages and loses due to earthquake.
Objective:
1. Develop a comprehensive approach to reducing the level of damage and losses due to earthquakes.
2. Perform a safety review of all current city structures and facilities paying close attention to disaster
proofing all facilities. Convene a group of department heads to prioritize the needs and research funding
strategies.
3. Develop disaster preparedness ca ches of supplies, tools, and equipment for use by city employees, so
that they may continue to perform their duties during a major emergency.
Mitigation Project: Earthquake fault identification and Seismic Retrofit projects
Proposed Mitigation Actions:
Identify and catalog seismically vulnerable structures.
Implement policies, procedures and regulations which reduce the exposure to earthquake hazards.
Protect the improved property and infrastructures vulnerable to earthqu ake hazards.
Special Environmental Impacts to community structures
Concerns:
Implementation Responsibility : Emergency Preparedness
Time Line : 5 Years
Funding Source: PDM Grant, General Funds, Capital Improvement funds, Staff time
Resources Required : To be Determined
Priority: H -M -L
Progress on Mitigation Actions 2013 -- 2017:
2013: Identify the safety needs of the City and vulnerable structures due to
earthquakes
2014: Develop a comprehensive approach and identify funding sources to
address specific needs
2015: Obtain funding and commence mitigation projects
2016: Conclude mitigation projects and development of caches of supplies
2017: Evaluate effectiveness of mitigation
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Sanitation District.
(b) City of Grover Beach Mitigation Action
Goal 2. Minimize the level of damage and losses due to flooding.
Objective: Research and identify flooding vulnerably within the City of Grover Beach.
Residential, commercial and local government.
Mitigation Project: Residential -Commercial -Government Floodsmart projects.
Proposed Mitigation Actions:
Implement policies, procedures and regulations which reduce the exposure to flood hazards.
Protect the improved property, natural resources and life vulnerable to flood hazards.
Reduce the vulnerability of community assets, particularly critical faciliti es, located in the 100 -year
floodplain.
Special Environmental Endangered habitats and impacts to surrounding area
Implementation Responsibility : Recreation and Maintenance Services, Public Works, and
Emergency Preparedness
Time Line : 5 years
Funding Source: PDM Grant, General Funds, C apital Improvement funds, Staff time
Priority: H -M -L
Progress on Mitigation Actions 2013 -- 2017:
2013: Research and identify flooding vulnerably within the City of Grover
Beach.
2014: Identify Funding needs and funding source.
2015: Apply for Pre -Disaster Mitigation Grant and Commence Mitigation
projects.
2016: Conclude Mitigation pr ojects.
2017: Evaluate effectiveness of Mitigation Actions.
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Sanitation District.
(c) City of Grover Beach Mitigation Action
Goal 3. Minimize the level of damage and losses to people due to Wildland and Structure Fires.
Objective: 1. Educate the public about Wildland and Structure fire dangers.
Mitigation Project: Create a Fire -Smart Community by developing a comprehensive approach to reducing
damage and loss due to fires.
Proposed Mitigation Actions:
EncourageAtheA100’ADefensibleASpaceAaroundAstructuresAinAtheAWildlandA
Urban Interface.
Continue weed abatement program
Enforce building codes and ordinances that eliminate the use of wood
shake roofs.
Enforce codes and ordina nces that require fire sprinkler systems in all
new structures constructed .
Environmental Riparian Habitats
Concerns:
Implementation Responsibility : Fire Department
Time Line: 5 Years
Funding Source: California Fire Safe Council, Fire Prevention Grant funding , PDM Grant,
General Funds, Capital Improvement funds, Staff time
Resources Required: To be determined
Priority: H -M -L
Schedule of Mitigation Actions 2013 -- 2017 :
2013: Develop comprehensive Fire Prevention program.
2014: Apply for grant funding.
2015: Commence education and action programs.
2016: Monitor and record effectiveness of Mitigation Actions.
2017: Evaluate effectiveness of Mitigation Actions.
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Sanitation District.
(d) City of Grover Beach Mitigation Action
Goal 4. Minimize the level of damage and loses to people and surrounding areas due to Tsunami
events, and increase understanding and response to Tsunamis.
Objective: To increase the understanding and response to tsunamis within the community by Working with
Federal and State agencies to better understand and prepare for the hazards of tsunami s and to improve the
abilityAtoArespondAtoAtsunamiAwarningsAprovidedAbyANO ’sAWestACoastAandA laskaATsunamiAWarningACenter.
Mitigation Project: Develop a comprehensive action plan to reduce damage from a Tsunami.
Proposed Mitigation Actions:
Review Tsunami inundation areas and educational needs.
Review emergency policies and training needs
Review Tsunami plans, maps, and evacuation plans
Special Environmental
Concerns:
Endangered coastline
Impacts to people and surrounding area
Implementati on Responsibility : Police Department
Time Line : 5 Years
Funding Sources: PDM Grant, General Funds, Capital Improvement funds, Sta ff time
Resources Required: To be determined
Priority: H -M -L
Progress on Mitigation Actions 2013 and 2017:
2013: Review inundation area pre -response plans
2014: Review community education needs and programs
2015: Study feasibility of Tsunami warning signs
2016: Implement community education along with installation of
signage
2017: Evaluate effectiveness of education and signage
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Sanitation District.
L. City of Grover Beach Property Schedule
M. City of Grover Beach Hazard Impact to Vulnerable Structures and Infrastructure
Category Building Location Sq. Ft. Value
Government
City Hall 154 S. 8 th St. 6,512 $1,828,467
Fire Station 701 Rockaway 6,745 2,287,010
Police Station 711 Rockaway 4,928 1,151,282
Community Facilities Community Center 1230 Trouville 6,384 1,499,040
Ramona Community Center 933 Ramona Ave. 2,856 780,730
Potable Water
and
Wastewater Facilities
Booster Station 551 N 16 th 0 641,899
Water Treatment Control Bldg S. 16 th St. and Mentone 224 205,614
Water Treatment Plant 16 S. 16 th St. and Mentone 224 1,918,934
Water Storage Tank (1) HI 1541 Hillcrest 0 1,441,945
Water Tank (2) 1541 Hillcrest 0 1,014,475
Four City Wells 16 th Street 2,000 349,4000
Other City owned
Facilities
Corporation Yard 1150 Farroll Ave. 5,408 1,562,984
Multi -Modal Transportation 180 W. Grand Ave. 1,000 823,835
Multi -Modal Transportation 933 Ramona Ave. 0 383,845
Bridges Various 2,600,000
Primary Roadways 4.2 miles 30,800,000
Critical Structures and Infrastructure Potentially Impacting Hazards
Category Building Location Earthquake Flood Fire Tsunami
Government
City Hall 154 S. 8 th St. X X
Fire Station 701 Rockaway X X
Police Station 711 Rockaway X X
Community Facilities
Community Center 1230 Troutville X X
Ramona Community Center 933Ramona Ave. X X
Potable Water
and
Wastewater
Facilities
Booster Station 551 N 16 th X
Water Treatment Control Bldg S. 16 th St. & Mentone X
Water Treatment Plant 16 S. 16 th St. & Mentone X
Water Storage Tank (1) HI 1541 Hillcrest X
Water Tank (2) 1541 Hillcrest X
Four City Wells 16 th Street X
Other City owned
Facilities
Corporation Yard 1150 Farroll Ave. X X
Multi -Modal Transportation 180 W. Grand Ave X X X X
Multi -Modal Transportation 933Ramona Ave. X X
Bridges Various X X X
Primary Roadways 4.2 miles X X X
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Sanitation District.
N. City of Grover Beach Property Loss Estimation to Vulnerable Structures and Infrastructure
O. Hazard and Zoning Maps
a. Earthquake Fault Risk
b. Flood Risk
c. Fire Risk
d. Tsunami Risk
e. Zoning Districts
Category Building Location 100% 50% 25 %
Go vernment
City Hall 154 S. 8 th St. $1,828,467 $914,234 $457,117
Fire Station 701 Rockaway 2,287,010 1,143,505 571,753
Police Station 711 Rockaway 1,151,282 575,641 287,821
Community
Facilities
Community Center 1230 Troutville 1,499,040 749,520 374,760
Ramona Community Center 933 Ramona Ave. 780,730 390,365 195,183
Potable Water
And
Wastewater
Facilities
Booster Station 551 N. 16 th St 641,899 320,950 160,475
Water Treatment Control Bldg S. 16 th St. & Mentone 205,614 102,807 51,404
Water Treatment Plan 16 S. 16 th St. & Mentone 1,918,934 959,467 479,734
Water Storage Tank (1) HI 1541 Hillcrest 1,441,945 720,973 360,487
Water Storage Tank (2) 1541 Hillcrest 1,014,475 507,238 253,619
Four City Wells S. 16 th St. 349,400 174,700 87,350
Other City owned
Facilities
Corporation Yard 1150 Farroll Ave. 1,562,984 781,492 390,746
Multi -Modal Transportation 180 W. Grand Ave. 823,835 411,918 205,959
Multi -Modal Transportation 933 Ramona Ave. 383,845 191,923 95,962
Bridges Various 2,600,000 1,300,000 650,000
Primary Roadways 4.2 miles 30,800,000 15,400,000 7,700,000
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Sanitation District.
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V. South County Sanitation District
A. District Description
The history of the South San Luis Obispo County Sanitation District dates back to 1958 when the Grover City
County Water Board commissioned engineering studies to investigate the rising nitrate levels observed in the
local ground water resource. At the time, Grover City and nearby Oceano were entirely unsewered and
dependent on the use of individual septic tanks. Much of nearby Arroyo Grande was sewered with a system
whichAledAtoAaAwastewaterAtreatmentAplantAlocatedAatAtheA“sewerAfarm”.AThisAplantAofferedA“primary”AtreatmentA
by means of an Imhoff tank, disposing of the partially treated wastewater onto adjacent land. The results of
those studies conducted by the Grover City County Water District confirmed the need to adequately address the
septicAtankAandA“sewerAfarm”AimpactAonAtheAlocalAgroundAwater. As a result, The County Board of Supervisors
formed the South San Luis Obispo County Sanitation District on September 3, 1963. Application was made for
federal grant funding and by 1966 co nstruction was completed, allowing for nearly 9 miles of incoming trunk
sewer lines, a new wastewater treatment plant, and an ocean outfall line for discharge of the treated
wastewater.
Several modifications, improvements and expansions to the wastewater treatment plant have occurred since
the original date of construction.
In 1978 an entirely new and longer outfall line was constructed to replace the initial outfall that underwent
serious damage during successive major storm events.
In 1979 the plant was upgraded to include new sludge drying beds, a sludge thickener, a new maintenance
building and the installation of standby power to provide for continued treatment in the event of a local power
failure.
In 1986 a major plant enlargement was constructed which led to the addition of a new fixed film reactor and the
conversion of the original aeration tank and final clarifier structure into a single, enlarged final clarifier unit.
Additionally, a new power generation building was constructed. These projects resulted in increasing the plant
capacity from the initial 2.5 mgd to 3.3 mgd.
In 1990 the plant was expanded once again to include the addition of a new secondary digester along with a new
primary clarifier unit. This expansion increased the overall treatment flow capacity from 3.3 mgd to 5.0 mgd.
In 2005 the most recent wastewater treatment plant improvement occurred with the addition of a new chlorine
contact chamber. This chamber was constructed to meet new effluent requirements stipulated in the District’sA
NPDES Permit R3-2004-0050, providing for adequate disinfection prior to release from the plant.
B. District Members
The District provides wastewater collection, treatment and disposal services to the three Member Agencies, City
of Arroyo Grande, City of Grover Beach, and Oceano Community Services District. The combined average annual
raw wastewater flow to the District from these agencies is in the order of 2.9 million gallons per day.
a. City of Arroyo Grande http://www.arroyogrande.com
The City of Arroyo Grande is a community encompassing 5.45 square miles of diverse landscapes ranging
from gentle rolling suburbs to scenic canyon lands. The current population of Arroyo Grande is reported to
be 17,252 which represent approximately 44% of theAtotalADistrict’sApopulation.A rroyoAGrandeAcurrentlyA
contributes approximately 1.26 million gallons per day of average annual raw wastewater flow to the
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District. Arroyo Grande's GeneralAPlanAemphasizesAtheAcommunity’sAdesireAtoAmaintainAaArural,Asmall town
character. The majority of Arroyo Grande is residential in use. Approximately 82% of the land area is
occupied by housing. Southwest of Hwy 101 the land is relatively flat and suburban in character. Arroyo
Grande has recently experienced a considerable increase in commercial/retail development along the Hwy
101 corridor. There are approximately 18 acres of city land devoted to light industrial and business park to
be developed. The projected build out population is 20,000 residents.
b. City of Grover Beach http://www.grover.org
Grover Beach is an incorporated ocean front city encompassing approximately 2.25 square miles of gently
rolling hills, urban and suburban neighborhoods. The current population of Grover Beach is 13, 156 which
represents approximately 36% of the total District population. Grover Beach currently contributes
approximately 1.03 million gallons per day of average annual raw wastewater flow to the District. Grover
Beach’sAGeneralAPlanAseeksAtoA“:preserveAandApromoteAanAeconomicallyAdiverseAtownAinfluencedAbyAthe
natural benefits of its location on the hills and valleys, reaching out to the coastal dunes, the beach, and the
PacificAOcean.” Most of the city appears commercial, suburban and recreational in character. There is little
light industry and no heavy industry. Commercial/Retail uses are located primarily on the Grand Avenue
corridor. The projected future build out population is 16,268 residents.
c. Oceano Community Services District http://www.oceanocsd.org
Oceano is an unincorporated area of San Luis Obispo County governed by the Oceano Community Services
District (OCSD). The OCSD boundary encompasses an area approximately 1.7 square miles and includes both
the town of Oceano and community of Halcyon. The current population of Oceano is 7,903 which represent
approximately 20% of the total District population. Oceano currently contributes approximately 0.59 million
gallons per day of average annual raw wastewater flow to the District. TheACounty’sASa n Luis Bay Area Plan
governs land use and development in Oceano which is comprised of large open space areas in the form of
beach land, the Oceano Airport, and several agricultural fields totaling about 126 acres. The community is
approximately 42% residential. Commercial areas are located along the railroad/Highway 1 corridor and
along Pier Avenue. These areas account for about 20% of the total land area. A limited amount of light
industrial uses are also located along the railroad corridor. These uses occupy about 20 acres of land. The
projected build out population of 9,601 is anticipated to be reached around 2020.
C. Form of Government
The District is governed by a three-member body, known as the District Board, who is appointed by the
respective member agencies on a yearly basis. The District Board includes one representative from each of its
Member Agencies, specifically, the City of Arroyo Grande, City of Grover Beach and the Oceano Community
Services District.
The District Board makes bi-partisan decisions in the best interest of the District. The Board makes policy and
operational decisions with advice from the District administrator/engineer and District staff. The District Board
also establishes district policy, setting goals and objectives, approves the annual budget, approves expenditures
and performs other related functions.
D. What is a Special District
StateAlawAdefinesAaAspecialAdistrictAasA“anyAagencyAofAtheAstateAforAtheAlocalAperformanceAofAgovernmenta l or
proprietaryAfunctionsAwithinAlimitedAboundaries.”AInAplainAlanguage,AaAspecialAdistrictAisAaAseparateAlocalA
government that delivers a limited number of public services to a geographically
limited area.
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Special districts have four distinguishing characteristics. Special districts:
Are forms of government.
Have governing boards.
Provide services and facilities.
Have defined boundaries.
Special districts have most of the same basic powers as counties and cities. They can sign contracts, employ
workers, and acquire real property through purchase or eminent domain. Following constitutional limits, they
can also issue bonds, impose special taxes, levy benefit assessments, and charge service fees. Like other
governments, special districts can sue and be sued. Special districts are local agencies which deliver specific
services to specific communities. Operating under state laws, special districts are autonomous government
entities that are accountable to the voters or landowners they serve. State officials, however, oversee special
districts For example; specialAdistrictsAmustAsendAtheirAannualAfinancialAreportsAtoAtheAStateAController’s Office .
Districts must also follow the state laws for special taxes, bonded debt, public hearings, public records and
elections.
E. Geographic Service Area
The South San Luis Obispo County Sanitation District encompasses a geographic area of 165 square miles. It is
located within an area known as the Five Cities area in the southwestern portion of San Luis Obispo County and
is located 15 miles south of the City of San Luis Obispo.
The District provides its services for the residents of the City of Arroyo Grande, the City of Grover Beach and the
Oceano Community Services District. In addition, there is a small County population of approximately
50 residences that are not incorporated within the communities listed above who also receive those services
offered by the District.
F. Wastewater Treatment
Clean water is one of our most precious natural resources. Before wastewater can be safely released back into
our waterways, it must first be adequately treated. That treatment consists of subjecting the wastewater to a
series of physical, chemical, and biological processes. Typically those processes occur at an industrial-scale
wastewater treatment plant.
The treatment of sewage is a multi-stage process to renovate the wastewater before it either; reenters a body
of water, is applied to the land or is reused. The goal is to reduce or remove organic matter, metals, solids,
nutrients, disease-causing organisms and other various forms of pollutants.
The typical processes involved in wastewater treatment are preliminary treatment, primary treatment,
secondary treatment and final treatment . During each of the first three processes settled solids, or sludge, is
removed from the liquid waste stream and further treated within a sludge digester.
a. Preliminary treatment is the first form of treatment that the wastewater undergoes upon arrival at a
treatment plant. Sticks, rags, large food particles, sand, gravel, toys, etc. are removed at this stage to
protect the pumps and other various facilities used within the treatment plant.
b. Primary treatment is the second step in the treatment process and is intended to separate the
suspended solids and greases from the wastewater. In this process, wastewater is passed into large
circular tanks called primary clarifiers and held for several hours before being released for further
treatment. The long detention times within these low velocity tanks allows for the heavier solids to
settle to the bottom as sludge, while the lighter solids float to the surface as scum. Mechanically
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rotating arms collect the sludge and solids, allowing for distribution to the sludge digester for further
treatment. The clarified wastewater remaining is now ready for the secondary treatment process.
c. Secondary treatment is a biological treatment process to remove dissolved organic matter from
wastewater. Sewage microorganisms are cultivated and added to the wastewater. The microorganisms
absorb organic matter from sewage as their food supply. Three separate approaches can be used to
accomplish secondary treatment; fixed film, suspended film and lagoon systems .
d. Fixed film systems grow microorganisms on substrates such as rocks, sand or plastic. The wastewater is
spread over the substrate, allowing the wastewater to flow past the film of microorganisms fixed to the
substrate. As organic matter and nutrients are absorbed from the wastewater, the film of
microorganisms grows and thickens. Trickling filters, rotating biological contactors, and sand filters are
examples of fixed film systems.
e. Final treatment focuses on the removal of disease-causing organisms from the wastewater. Treated
wastewater can be disinfected by adding chlorine or by using ultraviolet light. High levels of chlorine
may be harmful to aquatic life in receiving streams. Treatment systems often add a chlorine-neutralizing
chemical to the treated wastewater before stream discharge.
f. Sludge is generated throughout the sewage treatment process. Primary sludge, material that settles out
during primary treatment, often has a strong odor and requires treatment prior to disposal. Secondary
sludge is the extra microorganisms from the biological treatment processes. The goals of sludge
treatment are to stabilize the sludge and reduce odors, remove some of the water thereby reducing
volume, decompose some of the organic matter, thereby reducing volume, kill disease causing
organisms and disinfect the sludge.
Untreated sludge is about 97 percent water. Settling the sludge and decanting off the separated liquid removes
some of the water and reduces the sludge volume. Settling can result in sludge with about 92 to 96 percent
water. More water can be removed from sludge by using sand drying beds, vacuum filters, filter presses, and
centrifuges resulting in sludge with between 50 to 80 percent water. This dried sludge is called a sludge cake.
Aerobic and anaerobic digestion is used to decompose organic matter to reduce volume. Digestion also stabilizes
the sludge to reduce odors. Caustic chemicals can be added to sludge or it may be heat treated to kill disease-
causing organisms. Following treatment, liquid and cake sludge are usually spread on fields, returning organic
matter and nutrients to the soil.
Wastewater treatment processes require careful management to ensure the protection of the body of water
that rece ivesAtheAdischarge.ATrainedAandAcertifiedAtreatmentAplantAoperator’sAmeasureAandAmonitorAtheAincomingA
sewage, the treatment process and the final effluent to ensure regulatory compliance.
G. Collection System
The District owns and operates nearly 9 miles of collection sewer referred to as the District Trunk Line. The
purpose of this line is to allow for the collective transport of wastewater from the smaller municipal lines of
the three member agencies to the final destination of the District's Wastewater Treatment Plant. The Trunk
Line was initially constructed as part of the original District design of 1963. It is comprised of sewer pipe ranging
in size from 15-30 inches in diameter.
The pipe segments are primarily composed of either Vitrified Clay Pipe or Asbestos Cement Pipe. Due to
the naturally sloping coastal topography and owing to careful consideration and planning during the design
phase of the collection system, the District's collection system operates entirely as gravity fed sewer. As a result,
the District is not dependent upon the use of pumps at any point in the collection system to convey
the wastewater. The result is reduced annual operating expenses which in turn are passed directly on to the
District's customers.
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Annual average daily flow passing through the collection system is in the order of 2.9 million gallons per day
with peak daily flows of approximately 3.16 million gallons per day. Routine video inspection of the entire
system is performed every 4 years by means of Closed Circuit Television cameras (CCTV). The videos resulting
from those inspections are reviewed by system engineers and accurate assessments are made of the
system. System abnormalities and/or deficiencies noted within the collection system are ranked and prioritized,
assisting in the development of short term and long term rehabilitation plans. In addition, the collection system
is also cleaned on average every 4th year as part of the District's preventative maintenance plan.
H. Treatment Plant
The wastewater collected withinAtheADistrict’sATrunkASewerALineAbeginsAtheAtreatmentAprocessAinAtheAinfluentA
pumping plant. There it is passed through a Parshall metering flume to measure the quantity of influent
wastewater to the plant. Currently, average annual daily flow at the plant is on the order of 2.57 million gallons
per day (mgd), with peak day dry weather flow of approximately 3.37 mgd and peak hour wet weather flows of
8.03 mgd.
Once measured, the wastewater passes through an in-channel screen to mechanically separate and remove the
larger debris. Typically this debris consists of sticks, rags, large food particles, paper products, etc. The removed
debris is collected, ground, and hauled offsite to a landfill for disposal. The screened wastewater is then
distributed to the primary clarifiers by means of the four raw sewage pumping units located within the pumping
station.
Prior to arrival at the clarifiers the wastewater enters the clarifier control box. Under normal operations, the
control box is designed to separate the waste stream into equal parts for distribution into one of the two
primary clarifiers. The control box has the added function of isolating flow to either of the independent clarifiers
during periods of maintenance and repairs.
Clarification is achieved at the plant by means of two identical primary clarifiers; one constructed as part of the
original 1965 project and the other as part of the 1990 expansion. Each primary clarifier is 55 feet in diameter
with a side wall depth of 9 feet. These dimensions allow for a combined volume of 320,625 gallons. Under
average annual daily flow, the combined overflow rate of the clarifiers is 610gpd/sf and the combined detention
time between the clarifiers is 2.65 hours.
The clarifiers serve to separate a large portion of the suspended solids from the waste stream. This is achieved
by maintaining quiescent flow throughout detention, allowing for the heavier solids (sludge ) to sink to the
bottom of the tank and the lighter solids (scum ) to rise to the surface.
Th e sludge which accumulates on the bottom of the tank is raked continuously towards the center column by a
steel raking mechanism. This raking mechanism forces the sludge out of the clarifier through a sludge pocket
near the center of the tank. The scum is removed from the clarifier by means of a skimmer assembly attached to
one of the arms of the raking mechanism. As the skimmer arm revolves around the tank, scum is guided into a
trough attached to the inside of the launder wall. The scum trough removes the scum from the tank and
combines it with the sludge removed by the rakes. The removed sludge and scum are pumped to the plant
digesters for treatment. The clarified wastewater eventually discharges over the effluent weirs and flows to the
fixed film reactor to receive secondary treatment.
Secondary treatment is achieved at the plant by means of a single, fixed film reactor (FFR), constructed as part of
the 1986 improvement project. The FFR utilizes a bio-filtration process which removes the dissolved organic
matter from the wastewater. The FFR is 117 feet in diameter with a plastic media depth of 12 feet. Wastewater
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Sanitation District.
is distributed over microorganisms which grow on the plastic media substrate. The microorganisms absorb the
organic matter from the wastewater as their food supply, utilizing much of the suspended colloidal and dissolved
organic substrate matter for bioassimilation. As organic matter and nutrients are absorbed from the
wastewater, the film of microorganisms grows and thickens, periodically sloughing off the plastic media surface.
Partially decomposed organic matter, excess sloughed film, and dead film is carried off with the FFR effluent for
further clarification in the secondary clarifier unit.
The secondary clarifier unit, constructed as part of the 1986 improvement project, performs much the same
operation as the primary clarifier. The unit is 97 feet in diameter and has a side wall depth of 12 feet. These
dimensions allow for a total volume of 665,000 gallons. Under average daily flow, the overflow rate of the
clarifier is approximately 393gpd/sf and the detention time is 5.5 hours.
TheAfinalAstepAinAtheAtreatmentAprocessAatASouthASanALuisAObispoASanitationACountyADistrict’sAWastewaterA
Treatment Plant is the disinfection of the treated effluent prior to release through the ocean outfall. This process
occurs within the chlorine contact chamber and is achieved by the injection of sodium hypochlorite into the
waste stream to kill the majority of all remaining bacteria. Once the wastewaters disinfected, it is discharged
from the plant through the ocean outfall line.
I. Outfall
Treated municipal wastewater is discharged to the Pacific Ocean through a 4,400 foot outfall/diffuser system as
regulated by the California Regional Water Quality Control Board - NPDES Permit No. CA 0048003. The outfall
terminates in approximately 55 feet of water. The design of the outfall is intended to diffuse the treated
municipal waste prior to discharge, creating a minimum initial dilution of 165 parts seawater to 1 part treated
municipal waste at the point of release. This line also serves to convey treated wastewater from the City of
PismoABeachAwhichAsharesAthisAlineAbyAmeansAofAaAconnectionAatAtheADistrict’sAtreatmentAplantAsite.ADischargeAofA
treated municipal waste from Pismo Beach is regulated under California Regional Water Quality Control Board -
NPDES Permit No. CA0048151.
The outfall pipe/diffuser system is inspected tri-annually to ensure proper operation and structural integrity of
the system. The inspection is conducted from the shoreline to its ocean terminus and includes general
observations and photographic records of the outfall/diffuser as well as that of the ocean bottom in the vicinity
of the system.
J. Biosolids
Biosolids is a term used by the water treatment industry that refers to treated sludge . Sludge, or "biosolids," is
the byproduct of the treatment of domestic and commercial wastewater or sewage in a wastewater treatment
plant. During waste water treatment, bacteria and other microorganisms break down components in
wastewater into simpler and more stable forms of organic matter. Non-organic matter also settles into sludge.
Biosolids in their liquid form look like muddy water and contain 1-10% solids. Biosolids may be dewatered in a
second step of the treatment process, which turns it into a "cake" with the texture of a wet sponge. In this stage
it contains 11-40% solids.
According to US EPA , biosolids that meet treatment and pollutant content criteria "can be safely recycled and
applied as fertilizer to sustainably improve and maintain productive soils and stimulate plant growth." The US
EP ’sApromulgatedAregulationAisA40ACFRAPartA503.
Item 11.b. - Page 67
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Sanitation District.
K. Plant Process
At the South San Luis Obispo County Sanitation District the solids are collected at the Primary Clarifier and are
either pumped to the Gravity Sludge Thickener, or directly to the Primary Digester. In the Primary Digester, the
solids are heated to approximately 96 degrees and mixed using the pumped vortex method. Detention time in
the Primary Digester is approximately 26 days.
The solids are then transferred to the Secondary Digester which is unheated and unmixed. This allows the sludge
to cool and stratify. The supernatant is recycled through the plant for further treatment and the digested solids
are drawn off for further processing.
Sludge drying takes place in one of two ways depending on the weather. During the winter months the District
uses the centrifuge for the purpose of dewatering the sludge. The material is then stored in the sludge
lagoon. Once the weather warms up, operations Staff begins the use of the drying beds with supplemental
processing by the centrifuge. Polymer addition is required for proper operation of the centrifuge, however Staff
has made several modifications to the feed system allowing for a
dryer cake then usually obtained from similar machines (approx. 25%). The solids generated by the centrifuge
and drying beds are then stockpiled onsite until transportation to a composting facility is scheduled.
Over the years, the South San Luis Obispo County Sanitation District has maintained an excellent record with the
local Regional Board with respect to biosolids. In light of recent and pending regulations, for the last few years
the South San Luis Obispo County Sanitation District has processed all biosolids through commercial composting
facilities.
L. South San Luis Obispo County Sanitation District Specific Hazard Profiles §206.6(c)(2)(i)
Earthquake
The faults listed above that could potentially impact Arroyo Grande and Grover Beach are the same that would
affect the Sanitation District.
Flood
The Sanitation District is located in an area prone to repetitive damaging flooding.
Dam Inundation
Although the probability of this type of hazard occurring is highly unlikely, it warrants consideration because a
considerable portion of the study area is located in the inundation area of Lopez Dam.
In the event of complete failure of Lopez Dam, water would flow in a westerly direction following Arroyo Grande
Creek, approximately 3,000 feet in each direction of the centerline of the creek channel. Water flows would pass
through the rural areas directly below the dam and then into the Cities of Arroyo Grande, Grover Beach, some
schools within the Lucia Mar Unified School District and the Sanitation District before reaching the ocean.
Substantial impacts to life and property are a significant possibility in the City of Arroyo Grande. The threat
diminishes as the distance from the dam increases and as the flood plain widens as it approaches Grover Beach.
In Grover Beach, the general area of inundation, if the dam were at full capacity and experienced a total failure,
the low lying areas south of Grand Avenue and west of Highway 1 would be impacted.
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Sanitation District.
The State of California Division of Safety of Dams conducts periodic reviews to evaluate dam safety and a
considerable amount of work was completed in 2004 in order to bring the dam into compliance with current
seismic standards.
Tsunami
The Sanitation District is located in a tsunami inundation zone and is susceptible to severe tsunami damage.
Wildfire
The Sanitation District is located in a Moderate Wildland fire zone. The District is at a minor risk from wildfires.
M. Mitigation Strategies §201.6(c)(3)(iv)
The Mitigation Strategies for the South San Luis Obispo County Sanitation District were developed after an
analysis of the potential frequency of occurrence of the hazard and the potential fiscal impact. After careful
analysis the listed hazards were selected with the highest probability of occurrence with the maximum fiscal
impact.
Mitigation activities reduce the cost of disasters by minimizing property damage, injuries, and the potential for
loss of life, and are reducing emergency response costs, which would otherwise be incurred.
Mitigation activities reduce the cost of disasters by minimizing property damage, injuries, and the potential for
loss of life, and are reducing emergency response costs, which would otherwise be incurred.
The implementation and administration of the Mitigation Strategies are the responsibility of the Management of
the South San Luis Obispo County Sanitation District
Item 11.b. - Page 69
Multi-Jurisdictional Local Hazard Mitigation Plan
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Sanitation District.
South San Luis Obispo County Sanitation District Mitigation Action
(a) Goal 1. Minimize Earthquake damage and losses due to earthquakes.
Objective : 1. Research and confirm Earthquake faults impacting the South San Luis Obispo County Sanitation
District.
2. Use United States Geologic Survey and Cal EMA resource s for determining Earthquake
Faults at the South County Sanitation District facility.
3. Conduct a Seismic Retrofit Cost/Benefit Analysis of vulnerable structures
at the South San Luis Obispo County Sanitation District facility.
Mitigation Project : Earthquake fault impact identification and Seismic Retrofit projects
Proposed Mitigation Actions:
Seismic Retrofit of identified structures.
Identify, replace, repair clay pipe feeder system.
Special Environmental
Concerns:
Endangered habitats
Impacts to surrounding areas
Implementation Responsibility : South San Luis Obispo County Sanitation District
Time Line: 5 years
Funding Source: PDM Grant, District General Funds, Capital Improvement funds, Staff time
Resources Required : To be determined
Priority: H -M -L
Schedule of Mitigation Actions 2013 and 2017:
2013: Complete Risk Analysis and apply for Pre -Disaster
Mitigation Grant funding
2014: Commence Mitigation projects
2015: Conclude Mitigation Projects
2016: Monitor and record effectiveness of Mitigation Actions
2017: Evaluate effectiveness of Mitigation Action s
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Sanitation District.
South San Luis Obispo County Sanitation District Mitigation Action
(b) Goal 2. Minimize Flooding damage and losses due to flooding.
Objective s : 1. Research and identify flooding vulnerabilities within the South San Luis Obispo County Sanitation .
District f acility
2. Request and encourage San Luis Obispo County Public Works to implement adequate flood protection
measures in the county areas adjacent to the Sanitation District Plant.
Mitigation Project : 1 . Initiate Floodsmart projects within the South San Luis Obispo County Sa nitation
District facility .
2. Drainage channeling and maintenance projects for the Oceano Lagoon and
Creek Levees.
Proposed Mitigation Actions: Objective 1:
Upgra de facility flood protection measures.
Install flood gates for each building where appropriate.
Install and upgrade Stor m Drainage System.
Consider relocating the facility away from the flood inundation zone.
Objective 2:
Provide technical information as to cause and effect of upstream
watershed projects on downstream watershed hydrology that may
adversely affect the District Plant.
Take action to mitigate area flooding from Carpenter Creek to include
it’sAoutletAtoAtheAOcean.
Correct deficiencies in dire cting storm flows through the Oceano
Lagoon Area to viable discharge points.
Implement a regularly scheduled vegetation removal program in the
Arroyo Grande Creek, Meadow Cree k and Lagoon areas.
Special Environmental
Concerns:
Endangered habitats
Impacts to surrounding areas
Implementation Responsibility : Objective 1. South San Luis Obispo County Sanitation District
Objective 2. San Luis Obispo County
Time Line: 5 years
Funding Source: Objective 1. PDM Grant, District General Funds, Capit al Improvement
funds, Staff time .
Objective 2. To be determined by the County
Resources Required: Objective 1. To be determined
Objective 2. To be determined by the County
Priority: H -M -L
Item 11.b. - Page 71
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Sanitation District.
Objective 1.
Schedule of Mitigation Actions between 2013 and 2017:
2013 : Complete Risk Analysis and apply for Pre -Disaster
Mitigation Grant funding
2014 : Commence Mitigation projects
2015 : Conclude Mitigation Projects
2016 : Monitor and record effectiveness of Mitigation Actions
2017 : Evaluate effectiveness of Mitigation Actions
Objective 2.
Schedule of Mitigation Actions between 2013 and 2017
To be developed by the County
Item 11.b. - Page 72
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Sanitation District.
South San Luis Obispo County Sanitation District Mitigation Action
(c) Goal 3. Minimize the level of losses and damage due to Fires.
Objective : Create a fire safe facility environment
Mitigation Project: Develop a comprehensive action plan to reduce damage from fires.
Proposed Mitigation Actions:
Install built -in fire protection systems in administrative building.
Install appropriate bu ilt -in fire protection system in Motor Control Center.
Develop and create a fuels mitigation storage system .
Special Environmental
Concerns: Monitor impacts to surrounding areas
Implementation Responsibility : South San Luis Obispo County Sanitation District
Time Line: 5 years
Funding Source: PDM Grant, District Gen eral Funds, Capital Improvement funds, Staff
time
Resources Required: To be determined
Priority: H -M -L
Schedule of Mitigation Actions 2013 and 2017:
2013: Complete Risk Analysis and apply for Pre -Disaster
Mitigation Grant funding
2014: Commence Mitigation projects
2015: Conclude Mitigation Projects
2016: Monitor and record effectiveness of Mitigation Actions
2017: Evaluate effectiveness of Mitigation Actio n s
Item 11.b. - Page 73
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Sanitation District.
South San Luis Obispo County Sanitation District Mitigation Action
(d) Goal 4. Minimize Tsunami impacts to South San Luis Obispo County Sanitation District facility.
Objective : Prepare South San Luis Obispo County Sanitation District facility for a Tsunami.
Mitigation Project: Develop a comprehensive action plan to reduce damage from a Tsunami.
Proposed Mitigation Actions:
Determine the feasibility of constructing a Levee system.
Construct a Levee Tsunami protection system.
Consider relocating the facility out of the Tsunami inundation zone.
Special Environmental Concerns:
Monitor impacts to surrounding areas
Endangered habitats
Implementation Responsibility : South San Luis Obispo County Sanitation District
Time Line: 5 years
Funding Source : PDM Grant, District General Funds, Capital Improvement funds, Staff
time
Resources Required: To be determined
Priority: H -M -L
Schedule of Mitigation Actions 2013 and 2017:
2013: Complete Risk Analysis and apply for Pre -Disaster
Mitigation Grant funding
2014: Commence Mitigation projects
2015: Conclude Mitigation Projects
2016: Monitor and record effectiveness of Mitigation Actions
2017: Evaluate effectiveness of Mitigation Action s
Item 11.b. - Page 74
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Sanitation District.
N. South San Luis Obispo County Sanitation District Property Schedule
Category Building Location Sq. Ft. Value
Administration Main office 1600 Aloha 2,700 $450,000
Sewage Treatment
Facilities
Headworks/pumping station 1600 Aloha 1,500 1,000,000
Splitter box 1600 Aloha 150 500,000
Primary #1 and pumps 1600 Aloha 3,000 1,000,000
Primary #2 and pumps 1600 Aloha 3,000 1,000,000
Fixed film reactor and pumps 1600 Aloha 12,000 2,000,000
Final clarifier and pumps 1600 Aloha 8,000 2,000,000
Chlorine contact tank and pumps 1600 Aloha 10,000 2,000,000
Chemical tank farm and pumps 1600 Aloha 800 100,000
Digester #1 1600 Aloha 4,500 1,750,000
Digester #2 1600 Aloha 4,500 1,750,000
Heating and mixing room 1600 Aloha 1,200 750,000
Centrifuge and bldg 1600 Aloha 1,620 2,100,000
Motor control center 1600 Aloha 900 750,000
Co -gen and equipment 1600 Aloha 750 2,000,000
Emergency generator, bldg, and
accessories
1600 Aloha 625 400,000
Shop 1600 Aloha 2,100 250,000
Storage facility 1600 Aloha 2,200 350,000
Sludge drying beds 1600 Aloha 32,000 250,000
Storm drain system 1600 Aloha 1,500 LF 250,000
Total $20,650,000
Mobile Equipment
Diesel powered pumps 1600 Aloha $300,000
2 pick ups 1600 Aloha 18,000
1 SUV 1600 Aloha 15,000
1 forklift 1600 Aloha 15,000
1 case front end loader 1600 Aloha 71,000
Total $ 419,000
Sewage collection
facilities
Sewer trunk line Various 9 linear miles $3,346,224
Total $3,346,224
Sewage disposal
facilities
Outfall 4,400 feet off shore
Total $1,768,105
South County
Sanitation District
Total Assets *
Total Assets $26,183,329
*Independent Auditors Report, Crosby Co. San Luis Obispo CA.
Item 11.b. - Page 75
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Sanitation District.
O. South San Luis Obispo County Sanitation District Hazard Impact to Vulnerable Structures and
Critical Infrastructure
Administration Main Office 1600 Aloha X X X X
Sewage
Treatment
Facilities
Headworks/pumping station 1600 Aloha X X X X
Splitter Box 1600 Aloha X X X X
Primary # 1 and pumps 1600 Aloha X X X X
Primary # 2 and pumps 1600 Aloha X X X X
Fixed film reactor and pumps 1600 Aloha X X X X
Final clarifier and pumps 1600 Aloha X X X X
Chlorine contact tank and pumps 1600 Aloha X X X X
Chemical tank farm and pumps 1600 Aloha X X X X
Digester # 1 1600 Aloha X X X X
Digester # 2 1600 Aloha X X X X
Heating and mixing room 1600 Aloha X X X X
Centrifuge and building 1600 Aloha X X X X
Motor control center 1600 Aloha X X X X
Co -Gen and equipment 1600 Aloha X X X X
Emergency generator, bldg. and
accessories
1600 Aloha X X X X
Shop 1600 Aloha X X X X
Storage facility 1600 Aloha X X X X
Sludge drying beds 1600 Aloha X X X
Storm drain system 1600 Aloha X X X
Mobile
Equipment
Diesel powered pumps 1600 Aloha X X X
2 pick -up trucks 1600 Aloha X X X
1 SUV 1600 Aloha X X X
1 Forklift 1600 Aloha X X X
1 Case front end loader 1600 Aloha X X X
Sewage
Collection
Facilities
Sewer Trunk lines 1600 Aloha X X X
Sewage Disposal
Facilities
Outfall 1600 Aloha X X X
Item 11.b. - Page 76
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Sanitation District.
P. South San Luis Obispo County Sanitation District Loss Estimation to Vulnerable Structures and
Infrastructure
Critical Structures and Infrastructure
O. Hazard Maps
a. Earthquake Fault Risk
b. Flood Risk
c. Fire Risk
d. Tsunami Risk
Potentially Impacting Hazards
Category Building Location Earthquake Flood Fire Tsunami
Category Building Location 100% 50% 25 %
Administration Main Office 1600 Aloha $450,000 $225,000 $112,500
Sewage Treatment
Facilities
Headworks/pumping station 1600 Aloha 1,000,000 500,000 250,000
Splitter Box 1600 Aloha 500,000 250,000 125,000
Primary # 1 and pumps 1600 Aloha 1,000,000 500,000 250,000
Primary # 2 and pumps 1600 Aloha 1,000,000 500,000 250,000
Fixed film reactor and pumps 1600 Aloha 2,000,000 1,000,000 500,000
Final clarifier and pumps 1600 Aloha 2,000,000 1,000,000 500,000
Chlorine contact tank and pumps 1600 Aloha 2,000,000 1,000,000 500,000
Chemical tank farm and pumps 1600 Aloha 100,000 50,000 25,000
Digester # 1 1600 Aloha 1,750,000 875,000 437,500
Digester # 2 1600 Aloha 1,750,000 875,000 437,500
Heating and mixing room 1600 Aloha 750,000 375,000 187,500
Centrifuge and building 1600 Aloha 2,100,000 1,050,000 525,000
Motor control center 1600 Aloha 750,000 375,000 187,500
Co -Gen and equipment 1600 Aloha 2,000,000 1,000,000 500,000
Emergency generator, bldg. and
accessories
1600 Aloha 400,000 200,000 100,000
Shop 1600 Aloha 250,000 125,000 62,500
Storage facility 1600 Aloha 350,000 175,000 87,500
Sludge drying beds 1600 Aloha 250,000 125,000 62,500
Storm drain system 1600 Aloha 250,000 125,000 62,500
Mobile Equipment
Diesel powered pumps 1600 Aloha 300,000 150,000 75,000
2 pick -up trucks 1600 Aloha 18,000 9,000 4,500
1 SUV 1600 Aloha 15,000 7,500 3,750
1 Forklift 1600 Aloha 15,000 7,500 3,750
1 Case front end loader 1600 Aloha 71,000 35,500 17,750
Sewage Collection
Facilities
Sewer truck line Various 1,673,112 836,556 418,278
Sewage Disposal
Facilities
Outfall 4,400 feet off
shore
1,768,105 884,053 442,027
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Local Hazard Mitigation Plan for the Cities of Arroyo Grande, Grover Beach, the Lucia Mar Unified School District, and the South County Page 72
Sanitation District.
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Sanitation District.
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Sanitation District.
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Sanitation District.
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Sanitation District.
VI. LUCIA MAR UNIFIED SCHOOL DISTRICT
A. Description of School District
TheALuciaAMarAUnifiedASchoolADistrictAisASanALuisAObispoACounty’sAlargestAschoolAdistrict.ATheAdistrictAisAlocatedAalongAtheA
Central Coast of California, between Santa Maria and San Luis Obispo.
MoreAthanA10,588AstudentsAattendALuciaAMar’sAeleve n elementary schools, three middle schools, two comprehensive
high schools, one continuation high school and adult education program.
The Lucia Mar Unified School District covers 550 square miles, and serves the adjoining communities of Arroyo Grande,
Gr over Beach, Pismo Beach, Shell Beach, Nipomo and Oceano.
The Lucia Mar Unified School District contains the following schools:
SCHOOL NAME GRADES STUDENTS P/T RATIO ZIP CODE
Arroyo Grande High School 09 -12 2225 22.2 93420
Branch Elementary KG -06 301 30.1 93420
Harloe Elementary KG -06 628 27.3 93420
Lopez Continuation High 09 -12 143 13 93420
Mesa Middle 07 -08 527 18.8 93420
Ocean View Elementary KG -06 560 26.7 93420
Paulding (Ruth) Middle 07 -08 656 24.3 93420
Grover Heights Elementary KG -06 434 25.5 93433
Grover Beach Elementary KG -06 508 26.7 93433
Fairgrove Elementary KG -06 461 27.1 93433
Dana Elementary KG -06 607 25.2 93444
Nipomo Elementary KG -06 434 24.1 93444
Nipomo High School 9 -12 1117 20.3 93444
Dorothea Lange Elementary KG -06 581 27.7 93444
Oceano Elementary KG -06 460 24.2 93445
Judkins (Frances) Middle 07 -08 535 21.4 93449
Shell Beach Elementary KG -06 411 27.4 93449
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Sanitation District.
B. Classification Information:
Type : Lucia Mar Unified is a local school district that is not a component of a supervisory union.
Charter …AA llAschoolsAassociatedAwithALuciaAMarAUnifiedAareA“non -charterAschools”.AAAACombinedAStatisticalA rea…AALuciaAMarA
UnifiedAisAnotAassociatedAwithA“aArecognizedAcombinedAstatisticalAarea”.
Statistical Area …AALuciaAMarAUnifiedAisAassociatedAwithA“aArecognizedApopulationAnucleusAandAadjacentAcommunitiesAthatA
have a high degree of integration with that nucleus, and designated by the U.S. Government as a metropolitan or
micropolitan statistical area.
County : San Luis Obispo
Metro Status …AALuciaAMarAUnified’sAstatisticalAareaAisAaAmetropolitanAarea.
Service Area : Lucia Mar Unified serves a Core Based Statistical Area but not primarily its principal city.
Locale …AALuciaAMarAUnifiedAisAlocatedAinAtheA“UrbanAFringeAofAaAMid -size City ”.
Enrollment:
Enrollment by Grade
Lucia Mar Unified School District
2011 -2012
Enrollment
Kindergarten 784
Grade 1 751
Grade 2 763
Grade 3 775
Grade 4 734
Grade 5 776
Grade 6 802
Grade 7 870
Grade 8 848
Grade 9 868
Grade 10 860
Grade 11 874
Grade 12 883
Total 10,588
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Sanitation District.
C. Future Development
The Lucia Mar Unified School District currently has construction in progress at Arroyo Grande High School for
three Career Technical Education Academies. These Academies include AG Science New Construction Building,
Idea Facility Modernization and AutoTech Modernization with a total construction cost of $10.6 million.
Anticipated completion of these CTE Academies is scheduled for August of 2012.
The Central Coast New Tech High School, which is housed on the Nipomo High School campus, is scheduled to
open in August 2012. The addition of the Central Coast New Tech High School will involve the renovation of one
building currently located on the campus and the addition of one modular building increasing the square
footage by 6,000 sq.ft.
D. Lucia Mar Unified School District Specific Hazard Profiles §206.6(c)(2)(i)
Earthquake
The Earthquake faults that could impact Arroyo Grande and Grover Beach are the same that would affect the
School District.
Flood
District facilities that are located in an area prone to significant flooding is the Arroyo Grande High School and
Harlow Elementary School.
Dam Inundation
Although the probability of this type of hazard occurring is highly unlikely, it warrants consideration because a
considerable portion of the study area is located in the inundation area of Lopez Dam.
In the event of complete failure of Lopez Dam, water would flow in a westerly direction following Arroyo Grande
Creek, approximately 3,000 feet in each direction of the centerline of the creek channel. Water flows would pass
through the rural areas directly below the dam and then into the Cities of Arroyo Grande, Grover Beach, some
schools within the Lucia Mar Unified School District and the Sanitation District before reaching the ocean.
Substantial impacts to life and property are a significant possibility in the City of Arroyo Grande. The threat
diminishes as the distance from the dam increases and as the flood plain widens as it approaches Grover Beach.
In Grover Beach, the general area of inundation, if the dam were at full capacity and experienced a total failure,
the low lying areas south of Grand Avenue and west of Highway 1 would be impacted.
The State of California Division of Safety of Dams conducts periodic reviews to evaluate dam safety and a
considerable amount of work was completed in 2004 in order to bring the dam into compliance with current
seismic standards.
Tsunami
While some of the low lying areas of Oceano and Grover Beach are susceptible to tsunami damage, there are no
schools located in these low lying areas.
Wildfire
District facilities, located outside the boundaries of Arroyo Grande and Grover Beach, and within rural areas
include Nipomo High School and Branch Elementary. These facilities are located on level topography and
surrounded by agricultural uses. They are not at risk from wildfires.
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Sanitation District.
E. Mitigation Strategies §201.6(c)(3)(iv)
The Mitigation Strategies forLucia Mar Unified School District were developed after an analysis of the potential
frequency of occurrence of the hazard and the potential fiscal impact. After careful analysis the listed hazards
were selected with the highest probability of occurrence with the maximum fiscal impact.
Mitigation activities reduce the cost of disasters by minimizing property damage, injuries, and the potential for
loss of life, and are reducing emergency response costs, which would otherwise be incurred.
Mitigation activities reduce the cost of disasters by minimizing property damage, injuries, and the potential for
loss of life, and are reducing emergency response costs, which would otherwise be incurred.
The implementation and administration of the Mitigation Strategies are the responsibility of the Facilities,
Maintenance, Operations and Transportation department of the Lucia Mar Unified School District.
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Sanitation District.
Lucia Mar Unified School District Mitigation Action
(a) Goal 1. Minimize Earthquake damage and losses to School District facilities due to Earthquake.
Objective: 1. Research and confirm Earthquake faults impacting the Lucia Mar Unified School District.
2. Utilize USGS and CalEMA resources to determine Earthquake faults impacting the Lucia
Mar Unified School District facilities.
3. Conduct a Seismic Retrofit Cost/Benefit Analysis of vulnerable structures within the
Lucia Mar Unified School District.
Mitigation Project : Earthquake fault impact identification .
Proposed Mitigation Actions:
Seismic retrofit of appropriate facilitie s.
Environmental Concerns:
Endangered habitats
Impacts to surrounding areas
Lead Organization: Lucia Mar Unified Schoo l District, Facilities, Maintenance,
Operations and Transportation
Time Line : 5 years
Funding Source : State of California, School District General Funds, PDM Grant
Funding
Resources Required: To be determined
Priority: H -M -L
Schedu le of Mitigation Actions 2013 and 2017:
2013: Complete Risk Analysis and apply for Pre -Disaster
Mitigation Grant Funding.
2014: Commence Mitigation Projects
2015: Conclude Mitigation Projects
2016: Monitor and record effectiveness of Mi tigation Actions
2017: Evaluate effectiveness of Mitigation Actions
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Sanitation District.
Lucia Mar Unified School District Mitigation Action
(b) Goal 2. Minimize damage and due to flooding.
Objective : Re se arch and confirm the flooding vulnerability of Arroyo Grande High School and Harloe
Elementary School.
Mitigation Project: Determine if Floodsmart projects for Arroyo Grande High School and Harloe
Elementary School are appropriate .
Proposed Mitigation Actions:
Create Flood Protection measures for identified facilities .
Environmental Concerns:
Endangered habitats
Impacts to surrounding areas
Lead Organization: Lucia Mar Unified School District, Facilities, Maintenance,
Operations and Transportation
Time Line : 5 years
Funding Source : State of California, School District General Funds, PDM Grant
Funding
Resources Required: To be determined
Priority: H -M -L
Schedule of Mitigation Actions 2013 and 2017:
2013: Complete Risk Analysis and apply for Pre -Disaster
Mitigation Grant Funding.
2014: Commence Mitigation Projects
2015: Conclude Mitigation Projects
2016: Monitor and record effectiveness of Mitigation Actions
2017: Evaluate effectiveness of Mitigation Actions
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Sanitation District.
Lucia Mar Unified School District Mitigation Action
(c) Goal 3. Minimize damage and due to fires.
Objective : Create a fire safe environment for all Lucia Mar Unified School District facilities.
Mitigation Project: 1. Develop a comprehensive action plan to reduce damage from fires
e specially wild fires.
Proposed Mitigation Actions: Maintain and update, where appropriate, water storage systems for
the facilities that may be impacted by wildfires.
Environmental Concerns:
Endangered habitats
Impacts to surrounding areas
Lead Organization: Lucia Mar Unified School District, Facilities, Maintenance,
Operations and Transportation
Time Line : 5 years
Funding Source : State of California, School District General Funds, PDM Grant
Funding
Resources Required: To be determined
Priority: H -M -L
Schedule of Mitigation Actions 2013 and 2017:
2013: Complete Risk Analysis and apply for Pre -Disaster
Mitigation Grant Funding.
2014: Commence Mitigation Projects
2015: Conclude Mitigation Projects
2016: Monitor and record effectiveness of Mitigation Actions
2017: Evaluate effectiveness of Mitigation Actions
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Sanitation District.
Lucia Mar Unified School District Mitigation Action
(d) Goal 4. Minimize potential Tsunami impacts to Lucia Mar Unified School District facilities.
Objective : Determine Lucia Mar Unified School District facilities that may be located in the Tsunami
inundation zone.
Mitigation Project: DevelopAaAcomprehensiveAactionAplanAtoAreduceAdamageAfromATsunami’sAifA
appropriate .
Proposed Mitigation Actions: If facilities are located in the Tsunami inundat ion zone, determine
t he feasibility of constructing a levee system around the
i mpacted facilities .
Environmental Concerns:
Endangered habitats
Impacts to surrounding areas
Lead Organization: Lucia Mar Unified School District, Facilities, Maintenance,
Operations and Transportation
Time Lin e : 5 years
Funding Source : State of California, School District General Funds, PDM Grant
Funding
Resources Required: To be determined
Priority: H -M -L
Schedule of Mitigation Actions 2013 and 2017:
2013: Complete Risk Analysis and apply for Pre -Disaster
Mitigation Grant Funding.
2014: Commence Mitigation Projects
2015: Conclude Mitigation Projects
2016: Monitor and record effectiveness of Mitigation Actions
2017: Evaluate effectiveness of Mitigation Actions
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Sanitation District.
F. Lucia Mar Unified School District Property Schedule
Category Property Location Sq. Ft. Value
High Schools
Arroyo Grande High School 495 Valley Rd. Arroyo Grande 256,807 $31,638,822
Nipomo High School 525 N. Thompson Rd Nipomo 167,915 21,423,284
Lopez Continuation High School 1055 Mesa View Dr. Arroyo Grande 20,000 3,920,000
Middle Schools
Judkins Middle School 680 Wadsworth St. Pismo Beach 57,959 7,049,363
Mesa Middle School 2555 Halcyon Rd. Arroyo Grande 64,160 8,706,056
Paulding Middle School 600 Crown Hill St. Arroyo Grande 57,657 8,371,074
Elementary
Schools
Branch Elementary School 970 School Rd. Arroyo Grande 25,333 2,139,037
Dana Elementary School 920 W. Teft Nipomo 45,068 4,599,779
Fairgrove Elementary 2101 The Pike Grover Beach 41,233 4,435,102
Grover Beach Elementary 365 S. Tenth St. Grover Beach 42,615 4,555,869
Grover Heights Elementary 770 N. 8 th St. Grover Beach 38,306 3,564,636
Harloe Elementary 901 Fair Oaks Arroyo Grande 42,208 4,538,324
Dorothea Lange Elementary 1661 Via Alta Mesa Nipomo 35,000 5,775,000
Nipomo Elementary 190 E. Price St. Nipomo 46,006 5,001,899
Oceano Elementary 1551 17 th St. Oceano 37,994 4,395,496
Ocean View Elementary 1208 Linda Dr. Arroyo Grande 40,662 4,619,021
Shell Beach Elementary 2100 Shell Beach Rd Pismo Beach 30,510 2,822,997
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Sanitation District.
G. Lucia Mar Unified School District Hazard Impact to Vulnerable Structures and Infrastructure
High
Schools
Arroyo Grande High School 495 Valley Rd. Arroyo Grande X X
Nipomo High School 525 N. Thompson Rd Nipomo X
Lopez Continuation High School 1055 Mesa View Dr. Arroyo Grande X X
Middle
Schools
Judkins Middle School 680 Wadsworth St. Pismo Beach X X
Mesa Middle School 2555 Halcyon Rd. Arroyo Grande X
Paulding Middle School 600 Crown Hill St. Arroyo Grande X
Elementary
Schools
Branch Elementary School 970 School Rd. Arroyo Grande X X
Dana Elementary School 920 W. Teft Nipomo X
Fairgrove Elementary 2101 The Pike Grover Beach X X
Grover Beach Elementary 365 S. Tenth St. Grover Beach X
Grover Heights Elementary 770 N. 8 th St. Grover Beach X
Harloe Elementary 901 Fair Oaks Arroyo Grande X X
Dorothea Lange Elementary 1661 Via Alta Mesa Nipomo X
Nipomo Elementary 190 E. Price St. Nipomo X
Oceano Elementary 1551 17 th St. Oceano X X X
Ocean View Elementary 1208 Linda Dr. Arroyo Grande X
Shell Beach Elementary 2100 Shell Beach Rd Pismo Beach X X
H. Lucia Mar Unified School District Loss to Vulnerable Structures and Infrastructure
Critical Structures and Infrastructure Potentially Impacting Hazards
Category Property Location Earthquake Flood Wild
fire
Tsunami
High
Schools
Arroyo Grande High School 495 Valley Rd. Arroyo Grande $31,638,822 $15,819,411 $7,909,706
Nipomo High School 525 N. Thompson Rd Nipomo 21,423,284 10,711,642 5,355,821
Lopez Continuation School 1055 Mesa View Dr. Arroyo Grande 3,920,000 1,960,000 980,000
Middle
Schools
Judkins Middle School 680 Wadsworth St. Pismo Beach 7,049,363 3,524,682 1,762,341
Mesa Middle School 2555 Halcyon Rd. Arroyo Grande 8,706,056 4,353,028 2,176,514
Paulding Middle School 600 Crown Hill St. Arroyo Grande 8,371,074 4,185,537 2,092,769
Elementary
Schools
Branch Elementary School 970 School Rd. Arroyo Grande 2,139,037 1,069,519 534,760
Dana Elementary School 920 W. Teft Nipomo 4,599,779 2,299,980 1,149,945
Fairgrove Elementary 2101 The Pike Grover Beach 4,434,102 2,217,051 1,108,776
Grover Beach Elementary 365 S. Tenth St. Grover Beach 4,555,869 2,277,935 1,138,968
Grover Heights Elementary 770 N. 8 th St. Grover Beach 3,564,636 1,782,318 891,159
Harloe Elementary 901 Fair Oaks Arroyo Grande 4,538,324 2,269,162 1,134,581
Dorothea Lange Elementary 1661 Via Alta Mesa Nipomo 5,775,000 2,887,500 1,443,750
Nipomo Elementary 190 E. Price St. Nipomo 5,001,899 2,500,950 1,280,475
Oceano Elementary 1551 17 th St. Oceano 4,395,496 2,198,748 1,098,874
Ocean View Elementary 1208 Linda Dr. Arroyo Grande 4,619,021 2,309,511 1,154,756
Shell Beach Elementary 2100 Shell Beach Rd Pismo Beach 2,822,997 1,411,500 705,750
Category Building Location 100% 50% 25 %
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Sanitation District.
I. Hazard Maps
a. Earthquake Fault Risk
b. Flood Risk
c. Fire Risk
d. Tsunami Risk
,ll
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Sanitation District.
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Sanitation District.
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Sanitation District.
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Sanitation District.
APPENDIX I
City of Arroyo Grande Ordinance No. 646
ORDINANCE NO. 646
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY
OF ARROYO GRANDE AMENDING SECTIONS 16.04.070
AND 16.44.050 OF THE ARROYO GRANDE MUNICIPAL
CODE REGARDING FLOODPLAIN MANAGEMENT
WHEREAS , the City of Arroyo Grande (" City") participates in the National Flood Insurance Program (" NFIP")
pursuant to the National Flood Insurance Act of 1968 (the Act"); and
WHEREAS , the Department of Homeland Security's Federal Emergency Management Agency ("FEMA") has
prepared a Flood Insurance Study (" FIS") and has issued a Flood Insurance Rate Map (" FIRM") identifying the
Special Flood Hazard Areas (" SFHAs") which are located within the City;
WHEREAS , as a condition of continued eligibility in the NFIP, the City is required to have floodplain management
regulations which meet or exceed the standards of Code of Federal Regulations, Title 44, and Section 60. 3(d);
WHEREA S, this ordinance amends the City's floodplain management regulations in order to comply with the
current NFIP standards.
NOW, THEREFORE BE IT ORDAINED by the City Council of the City of Arroyo Grande as follows:
SECTION 1 . Arroyo Grande Municipal Code Section 16. 04.070 is hereby amended to add the following
definitions:
Basement" means, for floodplain management purposes, any area of the building having its floor sub
grade — i. e. below ground level — on all sides.
Development" means, for floodplain management purposes, any man-made change to improved or
unimproved real estate, including, but not limited to buildings or other structures, mining, dredging,
filling, grading, paving, excavation or drilling operations or storage or equipment or materials.
Expansion to an existing manufactured home park or subdivision" means, for floodplain management
purposes, the preparation of additional sites by the construction of facilities for servicing the lots on
which the manufactured homes are to be affixed ( including the installation of utilities, the construction
of streets, and either final site grading or the pouring of concrete pads).
Lowest Floor" means, for floodplain management purposes, the lowest floor of the lowest enclosed area,
including basement ( see floodplain management definition of " basement"). An unfinished or flood resistant
enclosure below the lowest floor that is usable solely for parking of vehicles, building access or storage in an
area other than a basement area, is not considered a building' s lowest floor provided it conforms to applicable
non-elevation design requirements, including, but not limited to, flood opening standards, anchoring standards,
construction materials and methods standards and standards for utilities as set forth in Section 16.44.050 of this
code. For residential structures, all sub grade enclosed areas are prohibited as they are considered to be
basements ( see floodplain management definition of "basement"). This prohibition includes below grade
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ORDINANCE NO. 646
PAGE 2
garages and storage areas. New manufactured home park or subdivision" means, for floodplain
management purposes, a manufactured home park or subdivision for which the construction of facilities
for servicing the lots on which the manufactured homes are to be affixed including at a minimum, the
installation of utilities, the construction of streets, and either final site grading or the pouring of concrete
pads) is completed on or after June 26, 2007
Recreational vehicle" means, for floodplain management purposes, a vehicle which is built on a single
chassis, four hundred square feet or less when measured at the largest horizontal projection, designed
to be self propelled or permanently towable by a light-duty truck, and designed primarily not for use as a
permanent dwelling but as temporary living quarters for recreational camping, travel, or seasonal use.
Special Flood Hazard Area ( SFHA)" means an area in the floodplain subject to a 1 percent or greater
chance of flooding in any given year. It is shown on an FHBM or FIRM as Zone A, AO, A1- A30, AE, A99 or
AH.
SECTION 2. The following definitions in Arroyo Grande Municipal Code Section 16. 04.070 are hereby amended
as follows:
Existing manufactured home park or subdivision" means, for floodplain management purposes, a
manufactured home park or subdivision for which the construction of facilities for servicing the lots on
which the manufactured homes are to be affixed ( including, at a minimum, the installation of utilities,
the construction of streets, and either final site grading or the pouring of concrete pads) is was
completed before June 26, 2007.
Manufactured home" means structure, transportable in one or more sections, which is built on a
permanent chassis and is designed for use with or without a permanent foundation when connected to
the required utilities. For floodplain management purposes, the term " manufactured home " does not
include a " recreational vehicle" as defined under the city's floodplain management regulations.
New construction" means, for floodplain management purposes, structures for which the start of
construction commence on or after the effective date o f June 26. 2007, and includes any subsequent
improvements to such structures.
SECTION 3. Arroyo Grande Municipal Code Section 16.44.050 is hereby amended to add a new subsection H as
follows:
H. Findings of Fact.
1. The flood hazard areas of the City of Arroyo Grande are subject to periodic inundation which
results in loss of life and property, health and safety hazards, disruption of commerce and
governmental services, extraordinary public expenditures for flood protection and relief, and
impairment of the tax base, all of which adversely affect the public health, safety and general
welfare.
2. These flood losses are caused by uses that are inadequately elevated, flood proofed, or
protected from flood damage. The cumulative effect of obstructions in areas of special flood
hazards which increase flood heights and velocities also contributes to flood losses.
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ORDINANCE NO. 646
PAGE 3
SECTION 4 . Arroyo Grande Municipal Code Section 16.44.050. E. 1 is hereby amended in its entirety to read as
follows:
1. Establishment of Development Permit. A development permit shall be obtained before any
construction or other development, including manufactured homes, within any area of special flood
hazard established in subsection D( 2) of this section. Application for a development permit shall be
made on forms furnished by the floodplain administrator. The applicant shall provide the following
minimum information:
a. Plans in duplicate, drawn to scale, showing :
i. Location, dimensions, and elevation of the area in question, existing or proposed
structures, storage of materials and equipment and their location;
ii. Proposed locations of water supply, sanitary sewer and other utilities;
iii. Grading information showing existing and proposed contours, any proposed fill, and
drainage facilities;
iv. Location of the regulatory floodway when applicable;
v. Base flood elevation information as specified in subsections
D( 2) or E( 3)( b) of this section;
vi. Proposed elevation in relation to mean sea level, of the lowest floor (including
basement) of all structures; and
vii. Proposed elevation in relation to mean sea level to which any nonresidential
structure will be flood proofed, as required in subsection F( 2)( c)(ii) of this section and
detailed in FEMA Technical Bulletin TB 3- 93.
b. Certification from a registered civil engineer or architect that the nonresidential flood proofed
building meets the flood proofing criteria in subsection F( 2)( c)( ii) of this section.
c. For a crawl-space foundation, location and total net area of foundation openings as required
in subsection F( 2)( c)(iii) of this section and detailed in FEMA Technical Bulletins 1- 93 and 7- 93.
d. Description of the extent to which any watercourse will be altered or relocated as a result of
proposed development.
e. All appropriate certifications listed in subsection E( 3)(d) of this section.
SECTION 5 . If any section, subsection, subdivision, paragraph, sentence, or clause of this Ordinance or any part
thereof is for any reason held to be unlawful, such decision shall not affect the validity of the remaining portion
of this Ordinance or any part thereof. The City Council hereby declares that it would have passed each section,
subsection, subdivision, paragraph, sentence, or clause thereof, irrespective of the fact that any one or more
section, subsection, subdivision, paragraph, sentence, or clause be declared unconstitutional.
SECTION 6. A summary of this Ordinance shall be published in a newspaper published and circulated in the City
of Arroyo Grande at least five ( 5) days prior to the City Council meeting at which the proposed Ordinance is to
be adopted. A certified copy of the full text of the proposed Ordinance shall be posted in the office of the City
Clerk. Within fifteen ( 15) days after adoption of the Ordinance, the summary with the names of those City
Council Members voting for and against the Ordinance shall be published again, and the City Clerk shall post a
certified copy of the full text of such adopted Ordinance.
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ORDINANCE NO. 646
PAGE 4
SECTION 7 . This Ordinance shall take effect thirty (30) days after its adoption.
On motion of Council Member Costello, seconded by Council Member Brown, and on the
following roll call vote to wit:
AYES: Council Members Costello, Brown, Guthrie, Ray, and Mayor Ferrara
NOES: None
ABSENT: None
The foregoing Ordinance was adopted this 25k" day of September 2012.
TONY FERRA, MAYOR
ATTEST:
KELLYWETMORE, CITY CLERK
APPROVED AS TO CONTENT:
STEVEN A DA MS, CITY MANAGER
APPROVED AS TO FORM:
TIMOTHY J. CARMEL, CITY ATTORNEY
OFFICIAL CERTIFICATION
I, KELLY WETMORE, City Clerk of the City of Arroyo Grande, County of San Luis Obispo, State of California, do
hereby certify under penalty of perjury, that the attached is a true, full, and correct copy of Ordinance No. 646
which was introduced at a regular meeting of the City Council on September 11, 2012; was passed and adopted
at a regular meeting of the City Council on the 25th day of September 2012; and was duly published in
accordance with State law (G. C. 40806).
WITNESS my hand and the Seal of the City of Arroyo Grande affixed this 25 th day of September 2012.
KELLY WETMORE, CITY CLERK
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