CC 2020-09-22_08h Local Hazard Mitigation Plan
MEMORANDUM
TO: CITY COUNCIL
FROM: WHITNEY McDONALD, CITY MANAGER
BY: CAMILLA KARAMANLIS, PROGRAM ANALYST
SUBJECT: CONSIDERATION OF ADOPTION OF THE 2020 UPDATE TO THE
MULTI-JURISDICTIONAL HAZARD MITIGATION PLAN
DATE: SEPTEMBER 22, 2020
SUMMARY OF ACTION:
Adoption of the 2020 update to the San Luis Obispo County Multi-Jurisdictional Hazard
Mitigation Plan (MJHMP).
IMPACT ON FINANCIAL AND PERSONNEL RESOURCES:
The total cost to develop the MJHMP was $175,000. Participating in an operational area-
wide hazard mitigation plan allowed the County to obtain a federal hazard mitigation
grant, which reduced costs by 75%. The remaining 25% costs were divided on a per
capita basis among the participating agencies, requiring the City to contribute $2,500 in
Fiscal Year 2019-20.
RECOMMENDATION:
It is recommended that Council adopt a Resolution approving the San Luis Obispo County
2020 Update to the Multi-Jurisdictional Hazard Mitigation Plan and accompanying City
specific annex (Annex A).
BACKGROUND:
In December 2015, the Federal Emergency Management Agency (FEMA) approved the
Multi-Jurisdictional Hazard Mitigation Plan (MJHMP) for the City of Arroyo Grande, the
City of Grover Beach, the Lucia Mar Unified School District, and the South San Luis
Obispo County Sanitation District, which instated the update adopted by Council in
December 2012. Local Hazard Mitigation Plans are required to be revised every 5 years
to reflect any hazard changes within the existing plan. The 2015 FEMA approved plan is
scheduled to be revised by December 2020.
In April 2017, the City of Arroyo Grande signed a letter of interest to be involved in the
MJHMP process for the County of San Luis Obispo. Participating in the countywide
MJHMP meets federal and State requirements and provides a cost-effective opportunity
to comprehensively evaluate hazards. The City agreed to participate in the multi-
Item 8.h. - Page 1
CITY COUNCIL
CONSIDERATION OF ADOPTION OF THE 2020 UPDATE OF THE SAN LUIS OBISPO
COUNTY MULTI-JURISDICTIONAL HAZARD MITIGATION PLAN
SEPTEMBER 22, 2020
PAGE 2
jurisdictional plan along with twenty (20) other agencies. The participating agencies
include the County of San Luis Obispo, seven (7) cities, nine (9) community services
districts and four (4) special districts, all of which are identified in the plan.
Development of the countywide MJHMP process took place over the past two years and
involved multiple meetings with the participating agencies and two public workshops that
occurred on March 19, 2019, and April 30, 2019. The MJHMP was prepared by the John
Wood Group with draft copies submitted to the California Office of Emergency Services
(CalOES) and to FEMA for their approval. On April 7, 2020, FEMA reported its approval
pending adoption of the MJHMP. Once the plan is adopted by all participating agencies,
the County of San Luis Obispo can adopt the overall plan. After all adoptions have been
competed, FEMA can formally approve the plan.
ANALYSIS OF ISSUES:
The primary purpose of the MJHMP update is to reduce or eliminate long-term risk to
people and property from natural hazards and their effects on the San Luis Obispo County
planning area. The planning process followed during the update utilized the input from a
multi-jurisdictional Hazard Mitigation Planning Committee (HMPC) consisting of
representatives from each participating jurisdiction. Through a grant secured by the
County, a contractor was hired to oversee the project with the County as the lead
jurisdiction, leading the participating agencies.
The planning process was developed for the MJHMP using the Disaster Mitigation Act of
2000 (DMA 2000) planning requirements and FEMA’s associated guidance. The original
FEMA planning guidance is structured around a four-phase process; however, the HMPC
integrated a more detailed 10-step planning process used for FEMA’s Community Rating
System (CRS) and Flood Mitigation Assistance programs that meets the requirements of
major grant programs including: FEMA’s Hazard Mitigation Grant Program, Pre-Disaster
Mitigation Program, Flood Mitigation Assistance Program, and flood control projects
authorized by the U.S. Army Corps of Engineers. The 10-step process consisted of the
following:
A) Organize Resources
1. Organize the Planning Effort
2. Involve the Public
3. Coordinate with other departments and agencies
B) Assess Risks
4. Identify the Hazards
5. Assess the Risks
C) Develop the Mitigation Plan
6. Set Goals
7. Review Possible Activities
8. Draft an Action Plan
D) Implement the Plan and Monitor Progress
Item 8.h. - Page 2
CITY COUNCIL
CONSIDERATION OF ADOPTION OF THE 2020 UPDATE OF THE SAN LUIS OBISPO
COUNTY MULTI-JURISDICTIONAL HAZARD MITIGATION PLAN
SEPTEMBER 22, 2020
PAGE 3
9. Adopt the Plan
10. Implement, Evaluate and Revise the Plan
The MJHMP consists of eight sections, jurisdiction-specific annexes, and appendices as
described below. The eight sections are written at the County level, however the sections
are repeated in each jurisdictional annex specific to each agency.
1. Promulgation and Adoption - Includes history of previous adoptions.
2. Introduction and Executive Summary – Provides a plan description
purpose and authority
3. Planning Process – Describes and documents the planning process
including coordination among agencies and the key stakeholders. In
addition, this section documents the public participation process.
4. County Profile – Provides County history, geography, demographics,
population profile, economy, climate, transportation, land use and
development trends.
5. Risk Assessment – Describes the process through which the MJHMP
team identified and prioritized relevant hazards including methodology and
results. This section also provides disaster declaration history, climate
change consideration summary, asset summary and detailed hazard
analysis and risk assessment for each identified hazard.
6. Capability Assessment - Presents San Luis Obispo County’ s mitigation
capabilities: programs and policies currently in use to reduce hazard
impacts or that could be used to implement hazard mitigation activities. It
also identifies select state and federal departments/agencies that can
supplement the County’s mitigation capabilities.
7. Mitigation Strategy – Describes mitigation goals and objectives,
identification and analysis of mitigation actions and a mitigation action plan.
8. Implementation and Monitoring – Describes the role of the MJHMP
planning committee in implementation and maintenance and processes for
incorporation into existing planning mechanisms. This section also outlines
maintenance monitoring and evaluation and continued public involvement.
Jurisdictional Annexes – Developed annexes for the participating
agencies, including the cities, community services districts, and special
districts. The City of Arroyo Grande annex is “Annex A” and is provided as
a separate attachment to this report for review purposes (Attachment 3).
Appendices – (A) Hazard Mitigation Planning Committee; (B) Mitigation
Categories, Alternatives, and Selection Criteria; (C) Planning Process
Documentation; (D) Jurisdiction Adoption Resolutions; (E) Critical Facilities;
(F) Climate Change Adaptation Planning Guide Consistency Summary; (G)
Climate Change Adaptation and Resilience Statutory Consistency
Summary; (H) References.
Item 8.h. - Page 3
CITY COUNCIL
CONSIDERATION OF ADOPTION OF THE 2020 UPDATE OF THE SAN LUIS OBISPO
COUNTY MULTI-JURISDICTIONAL HAZARD MITIGATION PLAN
SEPTEMBER 22, 2020
PAGE 4
City of Arroyo Grande Annex
This Jurisdictional Annex builds upon the previous version of the Multi-Jurisdictional Local
Hazard Mitigation Plan which encompassed the Cities of Arroyo Grande and Grover
Beach, the Lucia Mar Unified School District, and the South San Luis Obispo County
Sanitation District. The prior version of the Multi-Jurisdictional Local Hazard Mitigation
Plan was completed in December 2014 and approved by FEMA in December 2015. That
mitigation plan was not incorporated into the City’s General Plan, whereas this updated
mitigation plan is anticipated to be incorporated into the Safety Element of the General
Plan. The City has used the previous mitigation plan as a basis for the Emergency
Operations Plan. A review of jurisdictional priorities found no significant changes in
priorities since the last update. The proposed MJHMP update and associated annex will
supersede the current 2015 Arroyo Grande MJHMP.
The City of Arroyo Grande Planning Team identified the hazards that affect the City and
summarized their frequency of occurrence, spatial extent, potential magnitude, and
significance specific to the community (see Table 1). There are no hazards that are unique
to Arroyo Grande. The overall hazard significance considers the geographic area,
probability, and magnitude as a way to identify priority hazards for mitigation purposes.
Table 1: City of Arroyo Grande – Hazard Summaries
Item 8.h. - Page 4
--------
Hazard Geographic Probability of Magnitude/ Overall
Area future Severity Sig nifica nee
Occurrence (Extent)
Dam Incidents Extensive Unl ikely Catastrophic Mediu m
Drought and Water Shortage s ·g n ificant Like ly Lim ited Mediu m
Earthquake Significant Hig h ly Likely Cri tical Hig h
Flood Significant Hig h ly Likely Lim ited Med iu m
W ildfire Sig n ificant Occasio na l Lim ited Mediu m
Human Caused: Hazardo us Materi a ls s ·g n ificant Hig h ly Likely Neglig ib le Mediu m
Geographic Area Magnitude/Seve rity (Extent)
Limited: Less t ha n 10% of pl a nning area Catastroph ic-More t han 50 percent of property
Sign ifica nt 10-50% of p lannin g area severely damaged; shutdown of faci lit ies for mo;re
Extensive: S0 -100% of p lannin g area t ha n 30 days; and/or multip le deaths
P robabi.lity o f Futu re Occu rre nces Cri tical-.25 -50 percent ot property severely
ighly Likely: Near 100% c ha nce of occu rr ence in d amaged; s hutdown of faci li ties fo r a t least two
next ye ar or happens every year. weeks; and/or injuri es and/or ill nesses result in
Likely : Between 10 and 100% ohanoe o f occurrence in permane nt d isability
next year or has a recurrence interval o f 10 years or Lim ited-10-25 pernent of property severely
less . da maged; s hu tdown of faci li ties for more than a
Occasio na l: Between 1 and 10% chance of occurrence week; a nd/or injuri es/ill nesses treatable do not resu It
in the next year or has a recurrence interval of 1 1 to in p ermane nt di sabili ty
100 yearsa Negligibl e-less than 10 percent of property severely
Unlike ly: Less than 1 % chance of occurrence in next d amaged, s hutdown of faci li ties and services fo:r less
100 years o r has a rec u rr ence interval of greater t ha n t ha n 24 hours; a nd/or injuri es/ill nesses t reata bl e w it h
every 100 yea rs . fi rst aid
s ·:gnifi:cance
Lo w: min imal potent ia l impact
Med iu m : mode.ate pote ntia l impact
High: wides pread potential impact
CITY COUNCIL
CONSIDERATION OF ADOPTION OF THE 2020 UPDATE OF THE SAN LUIS OBISPO
COUNTY MULTI-JURISDICTIONAL HAZARD MITIGATION PLAN
SEPTEMBER 22, 2020
PAGE 5
The information contained within the City’s Annex, including results from the Vulnerability
Assessment and the Mitigation Strategy, will be used by the City to help inform updates
and the development of local plans, programs, and policies. The Engineering Division
may utilize the hazard information when implementing the City’s Community Investment
Program and the Planning and Building Divisions may utilize the hazard information when
reviewing a site plan or other type of development applications. As indicated, the City also
anticipates incorporating this MJHMP into its Safety Element, as recommended by
Assembly Bill (AB) 2140. As noted in Section 8 – Plan Implementation, the HMPC
representatives from Arroyo Grande will report on efforts to integrate the hazard mitigation
plan into local plans, programs and policies and will report on these efforts at the annual
HMPC plan review meeting.
ALTERNATIVES:
The following alternatives are provided for the Council’s consideration:
1. Adopt the Resolution to approve the 2020 update to the San Luis Obispo County
Multi-Jurisdictional Hazard Mitigation Plan; or
2. Do not adopt the Resolution; or
3. Provide further direction to staff.
ADVANTAGES:
Adoption of the Resolution will satisfy the requirement to update the City’s MJHMP and
allows the City to apply for future grants to implement hazard mitigation projects.
DISADVANTAGES:
There are no disadvantages identified with approval of the updated MJHMP.
ENVIRONMENTAL REVIEW:
In accordance with the California Environmental Quality Act (CEQA) and the State CEQA
Guidelines, it has been determined that this item is not a “project” as defined in State
CEQA Guidelines Section 15378 and is, therefore, exempt from CEQA pursuant to CEQA
Guidelines Section 15060(c)(3).
PUBLIC NOTIFICATION:
The Agenda was posted at City Hall and on the City’s website in accordance with
Government Code Section 54954.2.
Attachment:
1. San Luis Obispo County Multi-Jurisdictional Hazard Mitigation Plan 2020 Update,
without Annexes (available for public review on the City’s website at
www.arroyogrande.org/agendacenter )
2. Annex A: City of Arroyo Grande
Item 8.h. - Page 5
RESOLUTION NO.
A RESOLUTION OF THE CITY COUNCIL OF THE CITY
OF ARROYO GRANDE ADOPTING THE 2020 UPDATE
TO THE SAN LUIS OBISPO COUNTY 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, in coordination with the County of San
Luis Obispo, all local Municipalities, Community Service Districts, and local
Sanitation Districts participated in the FEMA-prescribed mitigation planning
process to prepare a Multi-Jurisdictional Hazard Mitigation Plan; and
WHEREAS, the 2020 Multi-Jurisdictional Hazard Mitigation Plan will serve as the City of
Arroyo Grande’ s required update of the 2015 Multi-Jurisdictional Hazard Mitigation
Plan; and
WHEREAS, the California Office of Emergency Services and FEMA officials have
reviewed the San Luis Obispo County Multi-Jurisdictional Hazard Mitigation Plan and
approved it contingent upon this official adoption of the participating bodies;
NOW, THEREFORE BE IT RESOLVED that the City Council of the City of Arroyo
Grande adopts the San Luis Obispo County Multi-Jurisdictional Hazard Mitigation
Plan, and in particular, the Local Hazard Mitigation Plan for the City of Arroyo Grande
Item 8.h. - Page 6
RESOLUTION NO.
PAGE 2
as set forth in Annex A of the Plan, a full copy of which is on file in the Community
Development Department and is hereby incorporated by reference.
BE IT FURTHER RESOLVED that the City of Arroyo Grande will submit a copy of
this Resolution to the County of San Luis Obispo to be included with the submissions
to the California Office of Emergency Services and FEMA officials to enable the
plan’s final approval in accordance with requirements of the Disaster Mitigation Act
of 2000.
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 22nd day of September, 2020.
Item 8.h. - Page 7
RESOLUTION NO.
PAGE 3
CAREN RAY RUSSOM, MAYOR
ATTEST:
KELLY WETMORE, CITY CLERK
APPROVED AS TO CONTENT:
__ _
WHITNEY MCDONALD, CITY MANAGER
APPROVED AS TO FORM:
TIMOTHY J. CARMEL, CITY ATTORNEY
Item 8.h. - Page 8
ATTACHMENT 1
San Luis Obispo County Multi-Jurisdictional Hazard Mitigation Plan 2020 Update, without
Annexes (available for public review on the City’s website at
www.arroyogrande.org/agendacenter )
Item 8.h. - Page 9
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.1
Community Profile
A.1.1 Mitigation Planning History and 2019 Process
This annex was created during the development of the 2019 San Luis Obispo County Hazard Mitigation Plan
update. This Jurisdictional Annex builds upon the previous version of the Multi-Jurisdictional Local Hazard
Mitigation Plan for the Cities of Arroyo Grande, Grover Beach as well as the Lucia Mar Unified School District and
South San Luis Obispo County Sanitation District; completed in December 2014 and approved by FEMA in
December 2015
mitigation plan will be. The City has used the previous mitigation plan as a basis for the Emergency Operations
Plan. A review of jurisdictional priorities found no significant changes in priorities since the last update.
The C Local Planning Team (LPT), listed in Table A.1 holds responsibility for implementation and
maintenance of the plan. Members are noted below. The Fire Chief for the Five Cities Fire Authority was the
C primary liaison to the County HMPC.
Table A.1 Arroyo Grande Hazard Mitigation Plan Revision Planning Group
Department or Stakeholder Title
Five Cities Fire Authority Fire Chief
Community Development -
Engineering Division Program Analyst
Community Development
Planning Division Planning Manager
More details on the planning process follow and how the jurisdictions, service districts and stakeholders
participated can be found in 3 Planning Process of the Base Plan, along with how the public was
involved during the 2019 update.
A.1.2 Geography and Climate
The City of Arroyo Grande is located in the south county area of San Luis Obispo County. Highway 101 traverses
the City, which is located midway between the Cities of Los Angeles and San Francisco. The Cities of Pismo
Beach and Grover Beach border Arroyo Grande to the northwest and west. The unincorporated community of
Oceano borders on the southwest and agricultural lands border the City on the north, east and south. This area
is known as the Five Cities. Arroyo Grande is the largest community in the Five Cities area, encompassing a total
of 5.45 square miles. The Arroyo Grande Creek is another dominate feature that runs north-south in the eastern
portion of the City and has been a source of flooding issues in the past (refer to the Vulnerability Assessment in
A.3). Figure A.1 displays a map the Arroyo Grande planning area.
Arroyo Grande has an average high temperature (July) of 72°F and low temperature of 42°F (January). The
jurisdiction receives 16.0 inches of rain annually. While the average temperature is relatively temperate, summer
and winter months bring unique weather patterns to the region. Refer to the Adverse Weather Section of the
HIRA in the Base Plan ( 5) for general details on the climate in this area.
ATTACHMENT 2
Item 8.h. - Page 10
A.1
; that previous mitigation plan was not incorporated into the City's General Plan, as this updated
ity's
ity's
Section
subsection
Section
•••
Item 8.h. - Page 11~ ~ t Annex A: City of Arroyo Grande Figure A.1 The City of Arroyo Grande ~1 --1,-;o-x,--~m~, ------------=-,.-------.,,--,,------~,-------:::----.-,-/~/..,,....----=......_,.....<....J:::-"7-Vy---,,11~z.:::::::::,::------=,,,,.,c._:::--71 ----.-1 --71 ""'./r--=~-----,1 z <( UJ (.) 0 (.) u:: ~ Map compiled 512019; intended for planning purposes only. Data Source: San Luis Obispo County, US Census TIGER Database, CA Open Data Portal, BLM/California State Office 0 . . .. . . ---------. 2 Miles . . . • • . --Local Roads --Highway --Freeway -+--+ Railroads -waterways p Arroyo Grande • 0 ." Sphere of Influence Deities Land Stewardship [Z]state N A San Luis Obispo County Local Hazard Mitigation Plan Annex A.2 City of Arroyo Grande I February 2020 •••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.3
A.1.3 History
The Arroyo Grande Valley was first inhabited by the Obispena Chumash Indians. The Obispena Chumash Indians
were living in the Arroyo Grande Valley when the first Spanish explorer, Juan Carbillo arrived in the Valley. In
1832, Francisco Zeba Branch purchased 17,000 acres in the Arroyo Grande Valley and started successful cattle
ranching business. By 1840, colonial settlement of California led to the Arroyo Grande Valley to be divided into
two major ranchos, granted by the Mexican government.
led to Br diminish drastically. As a result, the two large ranchos were divided into
smaller lots and sold to new settlers for agricultural uses. The Village of Arroyo Grande was developed to serve
the new population. In 1862 the Arroyo Grande township was established by the San Luis Obispo Board of
Supervisors, creating a flourishing community with a farm-based economy. In 1882 a railway depot was built,
and businesses began to be established along Branch Street. Residents of the Arroyo Grande township voted on
July 10, 1911 to incorporate and become the City of Arroyo Grande.
A.1.4 Economy
The top industries in the City are related to education, services and health as well as arts, entertainment and
recreation, and accommodation and food services. The major employers are the Arroyo Grande Community
Hospital (412 employees) and Lucia Mar Unified School District (1,000 employees) both of which are also in the
top twenty-five (25) employers in the County of San Luis Obispo (San Luis Obispo Chamber of Commerce 2018).
In addition to these employers, tourism is also large part of economic base. According the City
Housing Element of the General Plan, 85% of residents commute out of Arroyo Grande for work.
Estimates of select economic characteristics for the City of Arroyo Grande are shown in Table A.2.
Table A.2 City of Arroyo Grande Economic Characteristics, 2013-2017
Characteristic City of Arroyo Grande
Families below Poverty Level (%) 3.5%
All People below Poverty Level (%) 6%
Median Family Income $103,241
Median Household Income $74,654
Per Capita Income $38,893
Population in Labor Force 8,869
Population Employed* 8,486
Unemployment 383
Table A.3 and Table A.4 show how the City of labor force breaks down by occupation and
industry based on estimates from the 2013-2017 five-year American Community Survey.
Item 8.h. - Page 12
In the mid 1860's a severe drought event in the Valley
anch's cattle population to
the City's
Source : CA Department of Finance U.S. Census Bureau American Community Survey 2013-2017 5-Year Estimates, www.census .gov/
*Excludes armed forces
Arroyo Grande's
•••
's 2016
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.4
Table A.3 City of Arroyo by Occupation, 2013-2017
Occupation # Employed % Employed
Management, Business, Science, and Arts occupations 3,591 42%
Service occupations 1,482 18%
Sales and Office occupations 1,988 23%
Natural Resources, Construction and Maintenance occupations 789 9%
Production, Transportation and Material Moving occupation 627 7%
Total 8,486 100%
Table A.4 2013-2017
Industry # Employed % Employed
Educational Services, and Health Care and Social Assistance 1,897 22%
Retail Trade 823 10%
Professional, Scientific, and Mgmt., and Administrative and Waste Mgmt. Services 992 12%
Manufacturing 498 6%
Arts, Entertainment, and Recreation, and Accommodation, and Food Services 1,177 14%
Construction 571 7%
Finance and Insurance, and Real Estate and Rental and Leasing 609 7%
Public Administration 563 7%
Other Services, Except Public Administration 350 4%
Wholesale Trade 164 2%
Transportation and Warehousing, and Utilities 667 8%
Agriculture, Forestry, Fishing and Hunting, and Mining 74 1%
Information 101 1%
Total 8,486 100%
A.1.5 Population
In May 2019, the State Department of Finance released preliminary population data for the state to reflect
wildfire-driven changes to the local population. According to the report the City of Arroyo Grande has a
population of 17,876 persons and lost 4 residents from the previous year, leaving the population statically the
same. Select demographic and social characteristics for the City of Arroyo Grande from the 2013-2017 American
Community Survey are shown in Table A.5.
Item 8.h. - Page 13
Source: U.S. Census Bureau American Community Survey 2013-2017 5-Year Estimates, www.census .gov/
*Excludes armed forces
Source: U.S. Census Bureau American Community Survey 2013-2017 5-Year Estimates, www.census.gov/
•••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.5
Table A.5 -2015
Characteristic City of Arroyo Grande
Gender/Age
Male 8,716
Female 9,255
Median age (years) 48
Under 5 years 930
Under 18 years 3,366
65 years and over 4,132
Race/Ethnicity
White 15,877
Asian 1,022
Black or African American 119
American Indian/Alaska Native 52
Hispanic or Latino (of any race) 2,980
Education
% High school graduate or higher 95%
Disability Status
% of Population 5 years and over
with a disability 11%
The following table with information from the American Community Survey 5-year estimates (2013-2017) is
related to housing occupancy in the City of Arroyo Grande.
Table A.6 Housing Occupancy and Units
Housing Characteristic Estimate Percentage
Housing Occupancy
Total Housing Units 7,847 100%
Units Occupied 7,192 92%
Vacant 655 8%
Housing Units
1-unit detached 5,155 66%
1-unit attached 750 10%
2 units 273 4%
3 or 4 units 206 3%
5-9 units 215 3%
10-19 units 271 4%
20 or more units 442 6%
Mobile Home 519 7%
Boat, RV, van etc. 16 0.2%
Housing Tenure
Owner Occupied 5,023 70%
Renter Occupied 2,169 30%
Item 8.h. - Page 14
City of Arroyo Grande's Demographic and Social Characteristics, 2013
Source: CA Department of Finance, U.S. Census Bureau American Community Survey 2013-2017 5-Year Estimates, www.census.gov/
Source: CA Department of Finance, U.S. Census Bureau American Community Survey 2013-2017 5-Year Estimates, www.census.gov/
•••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.6
A.1.6 Development Trends
The dominant land use in the City of Arroyo Grande as shown in Figure A.2 below is residential. As can be seen
in the housing table above, a majority of the residential use is single family (1-unit detached) homes that are
owner occupied (70%). There are very few vacant parcels with and due to the
communit it is projected that future
development will be infill and revitalization of existing parcels. According to the 2001 General Plan the infill
development should be located in the following areas: East Grande Avenue, El Camino Real, and south and east
of the Historic Village area. The Sphere of Influence for the City includes a 185-acre agricultural parcel along the
.
County as a whole, adding 1,880
residents or an annual growth rate of 0.74 percent over a 16-year period. Population growth slowed down in
between 2010 and 2016 with the addition of 500 residents in a 6-year period. The estimated buildout population
for the City of Arroyo Grande is 20,000 by 2040. Due to water availability the City has a population growth cap of
20,000 by 2021 and is estimated to grow its population to 18,288 by 2020 (SLO County Council of Governments
2017). The availability of both the short-term and the long-term water source is the primary limitation of how
rban Water Management
projected water supply should exceed its projected water demand through the year 2035.
Item 8.h. - Page 15
in the City's boundaries
y's strong feelings toward the preservation of "prime" agricultural land,
City's southeastern boundary
Between 2000 and 2016, the City's population grew at a similar rate to the
the City can grow in the future . According to the City's U Plan (2015) the City's
•••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.7
Figure A.2 City of Arroyo Grande Land Use Map
https://www.arroyogrande.org/142/Planning-Division
Item 8.h. - Page 16
t..
'
•"
'
I
' "'-l i I,., l "·•
l
i
LAND USE CATEGORIES
-Agriculture I SFR Low-Medium Density Mixed-Use
-Conservation Op en Space SFR Medium Densi l y Vi ll age Core
Community Facilities MFR Medium-High Density Office Professional
SFR Very Low Densily -MFR High Density -Regional Commercial
SFR Low Density -MFR Very High Densily
LAND USE OVERLAYS
D Conservation/Open Space
D Sp ec ific Plan
D Neighborhood Plan
D Planned Developmenl
~ Planned Developmenl [C/0S)
Source: City of Arroyo Grande September 2018 _________________ _
•••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.8
Hazard Identification and Summary
The City of Arroyo Grande Planning Team identified the hazards that affect the City and summarized their
frequency of occurrence, spatial extent, potential magnitude, and significance specific to their community (see
Table A.7). There are no hazards that are unique to Arroyo Grande. The overall hazard significance takes into
account the geographic area, probability and magnitude as a way to identify priority hazards for mitigation
purposes. This is discussed further in the Vulnerability Assessment Section.
Table A.7 City of Arroyo Grande Hazard Summaries
Hazard Geographic
Area
Probability of
Future
Occurrence
Magnitude/
Severity
(Extent)
Overall
Significance
Dam Incidents Extensive Unlikely Catastrophic Medium
Drought and Water Shortage Significant Likely Limited Medium
Earthquake Significant Highly Likely Critical High
Flood Significant Highly Likely Limited Medium
Wildfire Significant Occasional Limited Medium
Human Caused: Hazardous Materials Significant Highly Likely Negligible Medium
Geographic Area
Limited: Less than 10% of planning area
Significant: 10-50% of planning area
Extensive: 50-100% of planning area
Probability of Future Occurrences
Highly Likely: Near 100% chance of occurrence in
next year or happens every year.
Likely: Between 10 and 100% chance of occurrence in
next year or has a recurrence interval of 10 years or
less.
Occasional: Between 1 and 10% chance of occurrence
in the next year or has a recurrence interval of 11 to
100 years.
Unlikely: Less than 1% chance of occurrence in next
100 years or has a recurrence interval of greater than
every 100 years.
Magnitude/Severity (Extent)
Catastrophic More than 50 percent of property
severely damaged; shutdown of facilities for more
than 30 days; and/or multiple deaths
Critical 25-50 percent of property severely
damaged; shutdown of facilities for at least two
weeks; and/or injuries and/or illnesses result in
permanent disability
Limited 10-25 percent of property severely
damaged; shutdown of facilities for more than a
week; and/or injuries/illnesses treatable do not result
in permanent disability
Negligible Less than 10 percent of property severely
damaged, shutdown of facilities and services for less
than 24 hours; and/or injuries/illnesses treatable with
first aid
Significance
Low: minimal potential impact
Medium: moderate potential impact
High: widespread potential impact
Vulnerability Assessment
The intent of this section is to assess vulnerability separate from that of the planning area as a
whole, which has already been assessed in 5.3 Risk Assessment in the Base Plan. This vulnerability
assessment analyzes the population, property, and other assets at risk to hazards ranked of medium or high
significance that may vary from other parts of the planning area.
Item 8.h. - Page 17
A.2
A.3
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Arroyo Grande's
subsection
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.9
The information to support the hazard identification and risk assessment was based on a combination of the
previous LHMP for the City and County and jurisdiction specific information collected during the 2019 update. A
Local Hazard Mitigation Plan Update Guide and associated worksheets was distributed to each participating
municipality or special district to complete during update process in 2019. Information collected was analyzed
and summarized in order to identify and rank all the hazards that could impact anywhere within the County, as
well as to rank the hazards and identify the related vulnerabilities unique to each jurisdiction.
Each participating jurisdiction was in support of the main hazard summary identified in the Base Plan (see Table
5.2). However, the hazard summary rankings for each jurisdictional annex may vary due to specific hazard risk
and vulnerabilities unique to that jurisdiction. The information in this annex
risk and vulnerabilities from that of the overall County.
hazard and is based on the City of Arroyo
Planning Team member input from the Data Collection Guide and the risk assessment developed
during the planning process (see 5 of the Base Plan), which included a more detailed qualitative and
quantitative analysis with best available data.
The hazard summaries in Table A.7 above reflect the hazards that could potentially affect City. The discussion of
vulnerability for each of the following hazards is located in A.3.2 Estimating Potential Losses. Based
on this analysis, the priority hazard (High Significance) for mitigation is earthquake. Those of Medium or High
significance for the City of Arroyo Grande are identified below.
Dam Incidents
Drought and Water Shortage
Earthquake
Flood
Hazardous Materials Incident
Wildfire
Other Hazards
Hazards assigned a significance rating of Low and which do not differ significantly from the County ranking (e.g.,
Low vs. High) are not addressed further in this plan and are not assessed individually for specific vulnerabilities in
this section. In the City of Arroyo Grande, those hazards include: land subsidence, agricultural pests and
infestation, biological agents, adverse weather and landslides.
committee members decided to rate several hazards as Not Applicable (N/A) to the
planning area due to a lack of exposure, vulnerability, and no probability of occurrence. Coastal hazards (coastal
storm/coastal erosion/sea level rise and tsunami) are Not Applicable (N/A) to the City of Arroyo Grande.
A.3.1 Assets at Risk
This section considers assets at risk, including values at risk, critical facilities and infrastructure,
historic assets, economic assets and growth and development trends.
Values at Risk
The following data on property exposure is derived from the San Luis Obispo County 2019 Parcel and Assessor
data. This data should only be used as a guideline to overall values in the City as the information has some
limitations. The most significant limitation is created by Proposition 13. Instead of adjusting property values
annually, the values are not adjusted or assessed at fair market value until a property transfer occurs. As a result,
Item 8.h. - Page 18
Note: The hazard "Significance" reflects overall ranking for each
Grande's
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Section
subsection
Arroyo Grande's
helps differentiate the jurisdiction's
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.10
overall value information is likely low and does not reflect current market value of properties. It is also important
to note that in the event of a disaster, it is generally the value of the infrastructure or improvements to the land
that is of concern or at risk. Generally, the land itself is not a loss and is not included in the values below. Table
A.8 shows the exposure of properties (e.g., the values at risk) broken down by property type for the City of
Arroyo Grande.
Table A.8 2019 Property Exposure for the City of Arroyo Grande by Property Types
Property Type Parcel
Count Improved Value Content Value Total Value
Agricultural 4 $95,432 $95,432 $190,864
Commercial 325 $179,293,623 $179,293,623 $358,587,246
Government/Utilities 80 -- -- $0
Other/Exempt/Misc. 185 $49,935,239 -- $49,935,239
Residential 5,225 $1,143,804,006 $571,902,003 $1,715,706,009
Multi-Family
Residential 511 $116,469,141 $58,234,571 $174,703,712
Mobile/Manufactured
Homes 8 $9,155,399 $4,577,700 $13,733,099
Residential: Other 328 $100,039,459 $50,019,730 $150,059,189
Industrial 4 $1,164,671 $1,747,007 $2,911,678
Vacant 23 $8,695,079 -- $8,695,079
Total 6,693 $1,608,652,049 $865,870,066 $2,474,522,115
Critical Facilities and Infrastructure
A critical facility may be defined as one that is essential in providing utility or direction either during the
response to an emergency or during the recovery operation. See Section 5 of the Base Plan for more details on
the definitions and categories of critical facilities.
An inventory of critical facilities in the City of Arroyo Grande from San Luis Obispo County GIS is illustrated in
Figure A.3 and described in Table A.9. A more detailed list of the critical facilities, their location square footage
and values can be found as an attachment in to this annex.
Item 8.h. - Page 19
Source : Wood Pie analysis based on ParcelQuest and San Lu is Obispo County Assessor's Office data 2019
from the City's 2015 HMP
•••
Item 8.h. - Page 20~ . Figure A.3 z <i: w u 0 u ii: u f City of Arroyo Grande's Critical Facilities Map compiled 512019; intended for planning purposes only. Data Source: San Luis Obispo County, US Census TIGER Database, CA Open Data Portal, BLM/California State Office, LAFCO. HIFLD 0 ~ 2 Miles --Highway --Freeway ~I -+--+ Railroads --waterways D Arroyo Grande : •. ·: Sphere of Influence Land Stewardship [7/lstate Critical Facilities ■ Emergency Services □ High Potential Loss Facilities □ Lifeline Utility Systems □ Transportation Systems N A Annex A: City of Arroyo Grande San Luis Obispo County Local Hazard Mitigation Plan Annex A.11 City of Arroyo Grande I February 2020 •••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.12
Table A.9
Facility Type Counts
Day Care Facilities 8
Emergency Medical Service Stations 2
Fire Stations 1
Hospitals 2
Local Law Enforcement 1
Nursing Homes 2
Private Schools 4
Public Schools 5
Urgent Care 1
Power Plants 1
FM Transmission Towers 1
Paging Transmission Towers 1
Energy Commission Facilities 3
Airports 1
Total 33
Transportation and Lifeline Facilities
Other transportation and lifelines include Highway 101 which traverses through the City of Arroyo Grande.
Damages to Highway 101 would not only impact the City of Arroyo Grande but the entire region.
Historic and Cultural Resources
Heritage tourism and Arroyo Grande historical sites have been a draw to the area. There have been several
informal historical surveys that have identified potential historical sites in the City, much of which is within the
Village of Arroyo Grande area. According to the Historical Context Survey completed in 2011, the following are
the eleven locally designated historical resources in Arroyo Grande.
Former City Hall 214 East Branch Street
Conrad House 208 East Branch Street
Residence 145 West Branch Street
Office 139 West Branch Street
Santa Manuela School House Heritage Square/Nelson Green
134 South Mason Street
Heritage House 126 South Mason Street
Swinging Bridge Short Street, spanning Arroyo Grande Creek
Bridge Street Bridge Bridge Street, south of Olohan Alley
Paulding House 551 Crown Hill Street (California Register, 2009)
Independent Order of Odd Fellows Hall (IOOF) 128 Bridge Street (National Register, 1991)
Item 8.h. - Page 21
City of Arroyo Grande's Critical Facilities
Source: San Luis Obispo County Planning & Building , HIFLD 2017
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Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.13
The local tourism website (Visit Arroyo Grande) lists the following historic landmarks in addition to the ones
identified above:
The Barn Museum
Rotary Bandstand
Mason Street Bridge
C. Loomis Building
The Paulding History House
The Pacific Coast Railroad Line
Brisco Old Hotel 129 E. Branch Olohan Building
Hoosegow Park LePoint Street.
Natural Resources
Natural resources are important to include in benefit-cost analyses for future projects and may be used to
leverage additional funding for projects that also contribute to community goals for protecting sensitive natural
resources. Awareness of natural assets can lead to opportunities for meeting multiple objectives. For instance,
protecting wetlands areas protects sensitive habitat as well as attenuates and stores floodwaters.
The City of Arroyo Grande is part of the Arroyo Grande and Cienga Valleys which is contains soils for
agricultural productions. Despite a majority of the agricultural lands are outside of the City jurisdiction the
Arroyo Grande community understands the importance of agricultural both to the local and the countywide
economy, have chosen to protect these lands, through development regulations, that border their community
on the north, east, and south.
Economic Assets
Arroyo Grande has two of the largest employers in the County located in the City jurisdiction. The Arroyo
Grande Community Hospital employees over 400 persons and is located in a dam inundation zone which would
have devasting impacts not only on the local economy but also the ability for the community to respond and
recovery during and after a disaster. As noted above, the Village of Arroyo Grande contains several historic
structures and is a draw for tourism, a major contributor to the local economy.
A.3.2 Estimating Potential Losses
Note: This section details vulnerability to specific hazards of high or medium significance, where quantifiable,
and/or where (according to LPT member input) it differs from that of the overall County.
Table A.8 above shows exposure to hazards in terms of number and value of structures. San
Luis Obispo he most
vulnerable structures are those in the floodplain (especially those that have been flooded in the past),
unreinforced masonry buildings, and buildings built prior to the introduction of modern-day building codes.
Impacts of past events and vulnerability to specific hazards are further discussed below (see 5.1
Hazard Identification for more detailed information about these hazards and their impacts on San Luis Obipso
County as a whole).
Note: The risk and vulnerability related to adverse weather hazards, agricultural pest infestation and disease and
biological agents in Arroyo Grande do not differ from those of the County at large. Please refer to 5 Risk
Assessment of the Base Plan for more details on these hazards.
Item 8.h. - Page 22
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"prime"
's
's
Arroyo Grande's
County's parcel and assessor data was used to calculate the improved value of parcels. T
subsection
Section
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.14
Dam Incidents
While there have been no past dam incidents or failures in the jurisdiction of the City of Arroyo Grande, the City
is among the most vulnerable communities in San Luis Obispo to the risk of dam failure. The Lopez Dam, a high
hazard earthen dam located upstream from the community, poses the greatest risk to Arroyo Grande if an
incident was to occur. A total of 8,273 persons and 3,565 properties could be inundated if the Lopez Dam was to
fail. Failure of the Lopez Dam would follow the Arroyo Grande Creek in a westerly direction approximately 3,000
feet in each direction of the centerline of the creek channel. Refer to the Dam Inundation Estimate Losses by
Jurisdiction and Dam table in 5 of the Base Plan for additional details on estimated losses in Arroyo
Grande. A majority of properties at risk are residential as shown in the table below. There are also 13 critical
facilities within the inundation zone for the Lopez Dam including Fire Station 1, Arroyo Grande Community
Hospital and City Hall. Refer to the Critical Facilities in the Lopez Dam Inundation Area, by Type of Facility table
in the Base Plan for details on the type of various types of critical facilities at risk A failure of the Lopez Dam
would affect Highway 101 impeding or reducing flows of goods, people and resources potentially impacting the
entire region. The Lopez Dam is also a major source of water for the City of Arroyo Grande; failure of the dam
would not only have immediate impacts to property but also long-water
supply. Refer to the Dam Incidents Section in 5 of the Base Plan for additional discussion on the
potential impacts of dam incidents in the County.
Item 8.h. - Page 23
Section
term impacts on the community's
Section
•••
Item 8.h. - Page 24~ . Figure A.4 z C( w u 0 u i:i: u ~ Lopez Dam Inundation Zone within City of Arroyo Grande Paso Robles SI "'-~ ~ Map compiled 5/2019; intended for planning purposes only. Data Source: San Luis Obispo County, US Census TIGER Database, CA Open Data Portal, SLM/California State Office, LAFCO, CA DWR. NID 2018 0 ;::>:\ J Hu•fn. R3 ·~<l-"'<;'\✓ I'-". cJ'e~ 2 Miles \: ~ ' \ . . ... • . . • • ~ -.,,iP'<f Annex A: City of Arroyo Grande Dam Inundation Extent Lopez Dam --Local Roads --Highway ---Freeway --+-----+ Railroads --Waterways p Arroyo Grande • Sphere of Influence ... Deities N A San Luis Obispo County Local Hazard Mitigation Plan Annex A.15 City of Arroyo Grande I February 2020 •••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.16
Table A.10 Lopez Dam Inundation Estimate Losses by Property Type
Property Type Parcel
Count
Improved
Value
Content
Value Total Value Loss
Estimate Population
Agricultural 3 $85,571 $85,571 $171,142 $85,571 --
Commercial 124 $51,205,571 $51,205,571 $102,411,142 $51,205,571 --
Government/Utilities 43 -- -- $0 $0 --
Other/Exempt/Misc. 90 $17,075,208 -- $17,075,208 $8,537,604 --
Residential 2,899 $494,234,816 $247,117,408 $741,352,224 $370,676,112 7,276
Multi-Family
Residential
191 $63,773,355 $31,886,678 $95,660,033 $47,830,016 479
Mobile/Manufactured
Homes
4 $3,696,769 $1,848,385 $5,545,154 $2,772,577 10
Residential: Other 202 $47,995,307 $23,997,654 $71,992,961 $35,996,480 507
Vacant 9 $2,985,692 -- $2,985,692 $1,492,846 --
TOTAL 3,565 $681,052,289 $356,141,266 $1,037,193,555 $518,596,777 8,273
Drought and Water Shortage
groundwater, local surface water, and storm water captured for groundwater recharge, irrigation and
construction water. The following figure from the City of Arroyo Grande Urban Water Management Plan (2016)
depicts the current and projected water supply through the year 2035. The City is projecting to receive an
increased amount of water supply from the Lopez Reservoir and from the Santa Maria Valley and Pismo
Formation groundwater basins. The City recognizes the risk of being dependent on groundwater resources, and
has considered other supplies such as the State Water Project and recycled water, especially during dry years or
drought conditions.
Item 8.h. - Page 25
Source: San Luis Obispo County Planning and Building Dept., Assessor's Office, ParcelQuest, Wood Pie Parcel Analysis
The City of Arroyo Grande has a variety of water sources that support the City's water supply, including
•••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.17
Figure A.5 City of Arroyo Grande Current and Projected Water Supplies
Severe drought events in recent years have caused concerns on the impact to
The City has taken steps to address drought in their community. On November 22, 2016 the City Council
adopted Resolution 4766 which provides that if certain specified water supply conditions are determined to exist
Drought Team was formed that consists of staff from various City departments to coordinate water use
reduction strategies. The returned Data Collection Guide from the City of Arroyo Grande Planning Team noted
that the state-wide
drought in California has led to regional impacts; this includes watering restrictions that according to the
Planning Team has led to landscaping on many properties to die, which increases the risk of wildfire for some
properties.
Earthquake
Earthquake events have occurred in Arroyo Grande in the past including a number of magnitudes 5.0 to 6.2
earthquakes. There are two mapped faults within the City of Arroyo Grande, the potentially active Wilmar
Avenue fault and the inactive Pismo fault; refer to the figure below. downtown business district is at a
greater risk from the impacts of a fault rupture compared to other part of the City due the majority of the
buildings being Unreinforced Masonry. These types of buildings have shown to be unstable and have collapsed
during earthquake events. business district would result in loss of commerce
and a significant loss in tax revenue for the City.
buildings located in the downtown business district. A magnitude 6.5 earthquake or greater could result in the
loss of the building and the relocation of City Hall.
Item 8.h. - Page 26
Water Supply Sources
Water Source
Lopez Project
Groundwater-Santa
Maria Valley
Groundwater Basin
Groundwater-Pismo
Formation 1
Transfers In
Exchanges In
Recycled Water
Desalinated Water
Total
Wholesale
Supplied Volume
Yes
No
No
No
No
No
No
2015
2,152
43
44
0
0
0
0
2,239
Projected Water Supply (afy) ----2,290 2,290 2,290 2,290
1,323 1,323 1,323 1,323
200 200 200 200
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
3 ,813 3,8 1 3 3,8 1 3 3,813
1 Assumes 80 afy of groundwater from Well No. 9, 80 afy from Well No. 10, and 40 afy from Well No. 11 will be available as a
reliable source of supply from 2016 through 2030.
Source: City of Arroyo Grande Urban Water Management Plan , 2016
the City's limited water supply.
that additional restrictions for the declared Stage 1 "Water Shortage Emergency" will be implemented . A
due to the region's water supply being served by a mix of reservoir and pumped well water,
The City's
The loss of buildings in the City's
Arroyo Grande's City Hall is one of the unreinforced masonry
•••
Item 8.h. - Page 27~ . Figure A.6 z ~ u 0 u ii: u ~ City of Arroyo Grande Earthquake Faults Map compiled 8/2019; intended for planning purposes only. Data Source: San Luis Obispo County, US Census TIGER Database, CA Open Data Portal, SLM/California State Office, USGS 0 • --2 Miles ... • • Annex A: City of Arroyo Grande -USGS Quaternary Faults --Local Roads --Highway --Freeway -+---+ Railroads --Waterways 0 Arroyo Grande • • Sphere of Influence -.. Dc~ies N A San Luis Obispo County Local Hazard Mitigation Plan Annex A.18 City of Arroyo Grande I February 2020 •••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.19
In addition to being at risk of groundshaking as a result of a fault rupture, the City of Arroyo Grande is also
susceptible to the effects of liquefaction. Much of the City has soils with a moderate risk for liquefaction.
According to GIS analysis conducted during this planning process, twenty-two (22) critical facilities located in the
City are at risk of liquefaction. The map and table below describes in more detail locations and the types of
properties at risk of liquefaction.
Item 8.h. - Page 28
CITY OF
~ .. ~t
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Item 8.h. - Page 29~ ~ t Figure A.7 z <( w (.) 0 (.) u:: u ~ Liquefaction Risk in Arroyo Grande Map compiled 5/2019: intended for planning purposes only. Data Source: San Luis Obispo County, US Census TIGER Database, CA Open Data Portal, BLM/California State Office, LAFCO 0 ~ ~-. ':1-7~ 2 Miles • . . . • Annex A: City of Arroyo Grande Moderate Risk Low Risk ---Local Roads ---Highway ---Freeway --+--+ Railroads ---Waterways C Arroyo Grande ... • Sphere of Influence -.. c::Jcities Land Stewardship N A San Luis Obispo County Local Hazard Mitigation Plan Annex A.20 City of Arroyo Grande I February 2020 •••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.21
Table A.11 City of Arroyo Grande Moderate Liquefaction Risk by Property Type
Property Type Parcel Count Improved Value
Agricultural 3 $85,571
Commercial 277 $145,325,794
Government/Utilities 51 --
Other/Exempt/Misc. 116 $24,911,019
Residential 3,451 $581,945,398
Multi-Family Residential 346 $92,734,024
Mobile/Manufactured Homes 6 $4,058,028
Residential: Other 230 $61,958,301
Industrial 4 $1,164,671
Vacant 13 $5,796,411
TOTAL 4,497 $917,979,217
Flood
There are several creeks that traverse the City of Arroyo Grande: Canyon/Meadow Creek on the west, Corbett
Canyon and Arroyo Grande Creeks on the east, and Los Berros Creek in the southeastern portion of City. All of
the creeks have areas adjacent to the waterways that have a potential for flooding. The duration of flood events
is dependent on the duration of rainfall as well as the tide levels outside of the City limits. Refer to the Flood
section of the Base Plan for further information on the areas of that are at risk of flooding as well as past flood
events that have impacted the City of Arroyo Grande.
In addition to being at risk of flooding from 100-year and 500-year storms,
(2012), Arroyo Grande is subject to sheet flow, shallow (generally less than 3 feet deep) overland flooding
characterized by unpredictable flow paths or confined to streets.
Values at Risk
A flood vulnerability assessment was completed during the 2019 update, following the methodology described
in Section 5 of the Base Plan. Flood hazards for the City of Arroyo Grande are shown in Figure A.8. Table A.12
and Table A.13 -year and 500-year floodplain, respectively. These
tables also detail loss estimates for each flood.
Item 8.h. - Page 30
Source: San Luis Obispo County Planning and Building Dept., Assessor's Office, ParcelQuest, Wood Pie Parcel Analysis
according FEMA's FIS for the County
summarize the values at risk in the City's 100
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Item 8.h. - Page 31~ ~ t City of Arroyo Grande's 100-and 500-Year Floodplains z <( w t) 0 t) ii: u ~ Map compiled 612019: intended for planning purposes only. Data Source: San Luis Obispo County, US Census TIGER Database, CA Open "fornia State Office, San Luis Obispo County Local Hazard Mitigation Plan City of Arroyo Grande I February 2020 ••• I ' ✓ ill ---.-: ,f "' "'' o, 8 --u, -~ !1' -, Gr'l/1<1~V11 Fair Oaks Ave ~ J--1~ II! -J \■ \ "'-\¾ "-\_ -A ,,A. r------.._ Annex A: City of Arroyo Grande IA Special Flood Hazard Ar, 1% Annual Chance 0.2% Annual Chance Local Roads ---Highway ---Freeway ~ Railroads LJ Nroyo Grande .. • : Sphere of Influence LJc1t1es Land Stewardship qz:2jstate N A Annex A.22
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.23
Table A.12
Property Type Parcel
Count
Improved
Value
Content
Value Total Value Loss
Estimate
Commercial 12 $2,703,155 $2,703,155 $5,406,310 $1,351,578
Government/Utilities 14 -- -- $0 $0
Other/Exempt/Misc. 12 $2,088,004 -- $2,088,004 $522,001
Residential 125 $21,076,591 $10,538,296 $31,614,887 $7,903,722
Multi-Family
Residential
15 $2,421,310 $1,210,655 $3,631,965 $907,991
Residential: Other 15 $2,495,400 $1,247,700 $3,743,100 $935,775
Vacant 3 $264,167 -- $264,167 $66,042
TOTAL 196 $31,048,627 $15,699,806 $46,748,433 $11,687,108
Table A.13
Property Type Parcel
Count
Improved
Value
Content
Value Total Value Loss
Estimate
Agricultural 2 $59,896 $59,896 $119,792 $29,948
Commercial 7 $3,728,895 $3,728,895 $7,457,790 $1,864,448
Government/Utilities 16 -- -- $0 $0
Other/Exempt/Misc. 19 $2,937,762 -- $2,937,762 $734,441
Residential 417 $76,542,670 $38,271,335 $114,814,005 $28,703,501
Multi-Family
Residential
12 $2,352,869 $1,176,435 $3,529,304 $882,326
Mobile/Manufactured
Homes
2 $3,093,854 $1,546,927 $4,640,781 $1,160,195
Residential: Other 1 $460,263 $230,132 $690,395 $172,599
Vacant 1 $972 -- $972 $243
TOTAL 477 $89,177,181 $45,013,619 $134,190,800 $33,547,700
Based on this analysis, the City of Arroyo Grande has significant assets at risk to the 100-year and greater floods.
There are 196 improved parcels located within the 100-year floodplain for a total value of over $46 million. An
additional 477 improved parcels valued at over $134 million fall within the 500-year floodplain.
Applying the 25 percent damage factor as previously described in Section 5 of the Base Plan, there is a 1 percent
chance in any given year of a 100-year flood causing roughly $11 million in damage in the City of Arroyo Grande
and a 0.2 percent chance in any given year of a 500-year flood causing roughly $45 million in damage
(combined damage from both floods). Figure A.9 shows the properties at risk to flooding in and around the City
of Arroyo Grande in relation to the mapped floodplain, based on the parcels that have improvements and parcel
centroids that intersect the flood hazard areas.
Item 8.h. - Page 32
Source: San Luis Obispo County Planning and Building Dept., Assessor's Office, ParcelQuest, Wood Pie Parcel Analysis
Source: San Luis Obispo County Planning and Building Dept., Assessor's Office, ParcelQuest, Wood Pie Parcel Analysis
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Item 8.h. - Page 33~ ~ ,,; ~ ._. Figure A.9 z <t w u 0 u u: u ~ Properties at Risk of Flood Grq--?<1-4ve in rairOaksAve Map compiled 6/2019; intended for planning purposes only. Data Source: San Luis Obispo County, US Census TIGER Database, CA Open Data Portal, SLM/California State Office, LAFCO, FEMA NFHL. ParcelQuest @ 0 ~,~__j'~ K ,, -. ,I\J· ~--~ " ,,_ ~ 2 Miles Annex A: City of Arroyo Grande -• 100-Year Flooded Parcels • 500-Year Flooded Parcels FEMA Special Flood Hazard Areas 0.2% Annual Chance ---Waterways ---Local Roads ---Highway ---Freeway -+---+ Railroads LJ Arroyo Grande ... .. • .' Sphere of Influence c::Jcities Land Stewardship E'.:Z State N A San Luis Obispo County Local Hazard Mitigation Plan Annex A.24 City of Arroyo Grande I February 2020 •••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.25
Limitations: This model may include structures in the floodplains that are elevated at or above the level of the
base-flood elevation, which will likely mitigate flood damage. Also, the assessed values are well below the actual
market values. Thus, the actual value of assets at risk may be significantly higher than those included herein.
Population at Risk
Using parcel data from the County and the digital flood insurance rate map, population at risk was calculated for
the 100-year and 500-year floods based on the number of residential properties at risk and the average number
of persons per household (2.47). The following are at risk to flooding in the City of Arroyo Grande:
100-year flood 389 people
500-year flood 1,084 people
Total flood 1,473 people
Insurance Coverage, Claims Paid, and Repetitive Losses
The City of Arroyo Grande joined the National Flood Insurance Program (NFIP) on September 19, 1984. NFIP
Insurance data indicates that as of April 18, 2019, there were 110 flood insurance policies in force in the City with
$30,278,600 of coverage. Of the 110 policies, 105 were residential (101 for single-family homes and 4 for 2-4-
unit homes) and 5 were nonresidential. There are 48 polices in A01-30 & AE zone and 2 policies in A zones. The
remaining 60 are in B, C, and X zones.
There have been 19 historical claims for flood losses totaling $412,456.68. All claims were for residential
properties; 9 were in A zones and 2 were in B, C or X zones; and 10 were pre-FIRM structures (the one post-FIRM
structure with a reported loss was in a B, C, or X zone). According to the FEMA Community Information System
accessed 4/3/2019, the City has two Repetitive Loss properties and two Severe Repetitive Loss properties, which
together are responsible for $203,239 in payments.
Critical Facilities at Risk
Critical facilities are those community components that are most needed to withstand the impacts of disaster as
previously described. -year floodplain, but according to the risk
assessment floods in Arroyo Grande tend to be more severe during a 500-year event. Thus, it is particularly
important to note that the critical facilities in the 500-year floodplain are all facilities that serve vulnerable
populations and thus should be given special attention. Table A.14 -year
floodplains. The impact to the community could be great if these facilities are damaged or destroyed during a
flood event.
Table A.14 Critical Facilities in the 500-year Floodplain: City of Arroyo Grande
Critical Facility Type 500-Year
Floodplain
Day Care Facilities 1
Public Schools 2
TOTAL 3
Item 8.h. - Page 34
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CITY OF
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There are no critical facilities in the City's 100
lists the critical facilities in the City's 500
Source: San Luis Obispo County Planning and Building Dept., Assessor's Office, ParcelQuest, Wood Pie Parcel Analysis
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Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.26
Wildfire
The mild climate and foggy days and nights typically help to maintain fuel moisture levels to a point that
limits the potential for rapid fire spread. Despite the temperate climate, there have been past wildfire events that
have put the City at risk. In 1985, the Los Pilitas Fire burned 84,271 acres in the mountains north of the City. The
fire spread quickly, resulting in 10 homes being destroyed. Although the threat was short lived, if the correct
combination of weather, topography and fuel existed, the potential for a wildfire within the City limit is possible.
CAL FIRE has designated the City of Arroyo Grande as being at increased risk from wildfires, based on Fire
Hazard Severity Zone mapping. Following the methodology described in the wildfire hazard Section 5 of the
Base Plan, a wildfire vulnerability analysis for the City of Arroyo Grande was completed (see Figure A.10).
There are 11 properties in City of Arroyo Grande that are located within the moderate to very high severity zones
(5 in the Moderate Severity Zone, 2 in the High Severity Zone, and 4 in the Very High Severity Zone), with a
combined value of $3,346,227 and impacting an estimated 18 persons (5 in the Moderate Severity Zone and 6 in
the High and Very High Severity Zone). The following table quantifies the potential losses by wildfire severity
zones and property type. There are no critical facilities in wildfire threat zones in Arroyo Grande.
Table A.15 Properties Within Wildfire Severity Zones
Property Type Parcel
Count
Improved
Value
Content
Value Total Value Loss
Estimate
Moderate Severity SRA Zone
Other/Exempt/Misc. 2 $1,686,663 -- $1,686,663 $1,686,663
Residential 3 $434,648 $217,324 $651,972 $651,972
Total 5 $2,121,311 $217,324 $2,338,635 $2,338,635
High Severity SRA Zone
Government/Utilities 1 -- -- -- --
Other/Exempt/Misc. 1 -- -- -- --
Total 2 $0 $0 $0 $0
Very High Severity SRA Zone
Residential 4 $671,728 $335,864 $1,007,592 $1,007,592
Total 4 $671,728 $335,864 $1,007,596 $1,007,596
Grand Total 11 $2,793,039 $553,188 $3,346,231 $3,346,231
The following map depicts the Fire Hazard Severity Zones in the City of Arroyo Grande.
Item 8.h. - Page 35
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City's
Source: San Luis Obispo County Planning and Building Dept., Assessor's Office, ParcelQuest, Wood Pie Parcel Analysis
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Item 8.h. - Page 36~ ~ . Figure A.10 City of Arroyo Grande's Fire Hazard Severity Zones z ~ w (.) 0 (.) u:: c3 ~ --Highway --Freeway -+--+ Railroads --Wateiways C Arroyo Grande ... • Sphere of Influence -.. Deities Land Stewardship E:.Z]state Map compiled 5/2019: intended for planning purposes only. Data Source: San Luis Obispo County. US Census TIGER Database, CA Open Data Portal, BLM/California State Office, LAFCO, CalFire i-----" 0: -fS/----. --~ c'J,i .... a -...::. 0 ..2J 2 Miles Annex A: City of Arroyo Grande e-1 Zones onsibility ) -Very High High Moderate Very High Fire Hazard Severity in Local Responsibility Areas N A San Luis Obispo County Local Hazard Mitigation Plan Annex A.27 City of Arroyo Grande I February 2020 •••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.27
Human Caused: Hazardous Materials
The Cal OES Warning Center reports 161 hazardous materials incidents in the City of Arroyo Grande from 1994
through October 24, 2018; as noted in Section 5 of the County plan, this likely excludes a large number of
unreported minor spills. This constitutes 9% of the hazardous materials incidents reported countywide during
the same time frame and averages out to roughly 6.4 incidents per year. As noted in Section 5, only around 6%
of reported hazardous materials incidents result in injuries, fatalities, or evacuations.
As shown in Figure 5-84 in the Base Plan, there are two EPA Risk Management Plan (RMP) facilities and three
CalARP regulated facilities located in the City. Additionally, Arroyo Grande sits within the Emergency Planning
Zone for the Diablo Canyon Nuclear Power Plant.
The Five Cities Fire Authority has located all petroleum, natural gas, combustible fuel pipelines and integrated
that information into the City of Arroyo Grande Emergency Operations Plan. All personal in the Five Cities Fire
Authority have been trained to handle hazardous materials incidents in addition to having three Hazardous
Materials Specialists on staff.
Capability Assessment
Capabilities are the programs and policies currently in use to reduce hazard impacts or that could be used to
implement hazard mitigation activities. This capabilities assessment is divided into five sections: regulatory
mitigation capabilities, administrative and technical mitigation capabilities, fiscal mitigation capabilities,
mitigation outreach and partnerships, and other mitigation efforts. To develop this capability assessment, the
jurisdictional planning representatives reviewed a matrix of common mitigation activities to inventory which of
these policies or programs, and shared any updates or changes through the Arroyo Grande Data Collection
Guide. The team then supplemented this inventory by reviewing additional existing policies, regulations, plans,
and programs to determine if they contribute to reducing hazard-related losses.
During the plan update process, this inventory was reviewed by the jurisdictional planning representatives and
Wood consultant team staff to update information where applicable and note ways in which these capabilities
have improved or expanded. Additionally, in summarizing current capabilities and identifying gaps, the
jurisdictional planning representatives also considered their ability to expand or improve upon existing policies
and programs as potential new mitigation strategies. The City of capabilities are summarized
below.
Item 8.h. - Page 37
A.4
Arroyo Grande's
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Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.28
A.4.1 Regulatory Mitigation Capabilities
Table A.16 City of Arroyo Grande Regulatory Mitigation Capabilities
Regulatory Tool Yes/No Comments
General plan Yes
Zoning ordinance Yes
Subdivision ordinance Yes
Growth management ordinance No Limited to Sphere of Influence
Floodplain ordinance Yes
Other special purpose ordinance (stormwater,
water conservation, wildfire) Yes Stormwater Ordinance
Building code Yes
Fire department ISO rating Yes
Erosion or sediment control program Yes
Stormwater management program Yes
Site plan review requirements
Capital improvements plan Yes
Economic development plan Yes
Local emergency operations plan Yes Under revision
Other special plans Yes Mills Act Ordinance; Climate Action Plan (2014)
Flood Insurance Study or other engineering
study for streams Yes
Elevation certificates (for floodplain
development) Yes
A.4.2 Administrative/Technical Mitigation Capabilities
Table A.17 identifies the personnel responsible for activities related to mitigation and loss prevention in Arroyo
Grande.
Table A.17 City of Arroyo Grande Administrative/Technical Mitigation Capabilities
Personnel Resources
Yes/
No Department/Position
Planner/engineer with knowledge of land
development/land management practices Yes
Community Development Department: Assistant
Planner, Planning Manager, Community
Development Director
Engineer/professional trained in construction
practices related to buildings and/or infrastructure Yes Community Development Department: City
Engineer, Building Official
Planner/engineer/scientist with an understanding of
natural hazards Yes Community Development Department: Planning
Manager
Personnel skilled in GIS Yes Community Development Department: Program
Analyst
Full time building official Yes Community Development Department: Building
Official
Floodplain manager Yes City Engineer
Emergency manager Yes City Manager
Grant writer No
GIS Data Resources Yes Program Analyst
Item 8.h. - Page 38
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Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.29
Personnel Resources
Yes/
No Department/Position
(Hazard areas, critical facilities, land use, building
footprints, etc.)
Warning systems/services
(Reverse 9-11, outdoor warning signals, social
media)
Yes Police Department, Fire Department, Deputy
City Clerk
A.4.3 Fiscal Mitigation Capabilities
Table A.18 identifies financial tools or resources that the City could potentially use to help fund mitigation
activities.
Table A.18 City of Arroyo Grande Fiscal Mitigation Capabilities
Financial Resources
Accessible/Eligible
to Use (Yes/No)
Community Development Block Grants Yes
Capital improvements project funding Yes
Authority to levy taxes for specific purposes Yes
Fees for water, sewer, gas, or electric services Yes/No gas and electric
fees
Impact fees for new development Yes
Incur debt through general obligation bonds Yes
Incur debt through special tax bonds Yes
Incur debt through private activities No
Withhold spending in hazard prone areas No
A.4.4 Mitigation Outreach and Partnerships
The City is currently working with the Five Cities Fire Authority, County and FireSafe Council to develop a city-
specific Community Wildfire Protection Plan (CWPP). Mitigation efforts identified include education/outreach.
A.4.5 Other Mitigation Efforts
Through development of the Cherry Creek Estates, the City improved the Newsom Springs drainage, which now
allows drainage through the Cherry Creek Estates development to Arroyo Grande Creek. Additionally, the City
has been working with the Clark family on Highway 227 to develop a siltation area to allow easier removal of
sediment in Tally Ho Creek and keep sediment from being delivered in Tally Ho Creek.
The City has also conducted fuel reduction projects to reduce wildfire threat.
A.4.6 Opportunities for Enhancement
Based on the capabilities assessment, the City of Arroyo Grande has several existing mechanisms in place that
already help to mitigate hazards. self-assessment of
capability in which they rated (limited to high) the degree of capability they believed the community had. The
City noted having a high degree of capability for planning and regulatory capabilities, administrative and
technical capabilities and political capability but a moderate rating for their fiscal capabilities. This may be an
opportunity for the City to expand or improve on their fiscal capabilities and further protect the community.
Other future improvements may include providing training for staff members related to hazards or hazard
Item 8.h. - Page 39
In Arroyo Grande's 2015 LHMP the City conducted a"
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Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.30
mitigation grant funding in partnership with the County and Cal OES. Additional training opportunities will help
to inform City staff members on how best to integrate hazard information and mitigation projects into their
departments. Continuing to train City staff on mitigation and the hazards that pose a risk to the City of Arroyo
Grande will lead to more informed staff members who can better communicate this information to the public.
Mitigation Strategy
A.5.1 Mitigation Goals and Objectives
The City of Arroyo Grande Planning Team determined the four goals from the 2015 HMP continue to be
appropriate for this plan update, with the addition of a fifth goal specific to drought events. The following are
Goal 1 Minimize the level of damage and losses due to flooding
Goal 2 - Minimize the level of damage and losses due to earthquakes
Goal 3 Minimize the level of damage and losses due to wildland and structure fires
Goal 4 Minimize impacts to the community from dam inundation
Goal 5 Minimize impacts to the community from prolonged drought events
Continued Compliance with the National Flood Insurance Program
The City has been an NFIP participating community since 1984. In addition to the mitigation actions identified
herein the City will continue to comply with the NFIP. Floodplain management is under the purview of the
Community Development Department City Engineer. This includes ongoing activities such as enforcing local
floodplain development regulations, including issuing permits for appropriate development in Special Flood
Hazard Areas and ensuring that this development mitigated in accordance with the regulations. This will also
include periodic reviews of the floodplain ordinance to ensure that it is clear and up to date and reflects new or
revised flood hazard mapping.
A.5.2 Completed 2015 Mitigation Actions
During the 2019 planning process the City of Arroyo Grande Planning Team reviewed all the mitigation actions
from the 2015 plan. During the 2019 planning process the Planning Team identified that of their sixteen (16)
mitigation actions from 2015, six (6) of the actions are implemented annually and four (4) were noted as being in
progress, demonstrating ongoing progress and building the resiliency to disasters.
A.5.3 Mitigation Actions
Table A.1 below describes all the annual implementation and in progress actions, the actions that were
determined should be deferred as well new actions developed by the Planning Team. Actions were prioritized
using the process described in 7.2.1 of the Base Plan. Actions that mitigate losses to future
development
Item 8.h. - Page 40
A .5
the City of Arroyo Grande's 2019 mitigation goals:
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9
subsection
are denoted by an '*' in the table .
community's
Item 8.h. - Page 41Annex A: City of Arroyo Grande Recreation PDM Grant, Maintenance Residential-Commercial-Government Flood smart Services, $100,000 General AG.1 Flood projects Residential: relocate, revise, building codes, Community to Funds, Capital I High I Annual I Annual and provide mitigation assistance Development, $500,000 Improvement Implementation Funds, Staff Emergency Time Preearedness Recreation PDM Grant, Maintenance Residential-Commercial-Government Flood smart Services, $100,000 General AG.2 Flood projects Commercial: relocate, revise, building codes, Community to Funds, Capital I High I Annual I Annual and provide mitigation assistance Development, $500,000 Improvement Implementation Funds, Staff Emergency Time Pre aredness Deferred; Limited availability of land Recreation PDM Grant, to expand basins Maintenance has resulted in Conduct a cost to benefit analysis to consider Services, $100,000 General deferral. Future AG.3* I Flood I expanding the capacity of the retention basins at Community to Funds, Capital High Deferred analysis will focus various locations in the City of Arroyo Grande Development, $500,000 Improvement on increasing Funds, Staff Emergency Time depth of existing Preparedness basins. Staff and fiscal constraints are ongoing. Recreation PDM Grant, Maintenance Services, $10,000 General AG.4* I Flood I Creation of Bio-Swales for water conservation Community to Funds, Capital I High I Annual I Annual Development, $50,000 Improvement Implementation Funds, Staff Emergency Time Preparedness San Luis Obispo County Local Hazard Mitigation Plan Annex A.32 City of Arroyo Grande I February 2020 •••
Item 8.h. - Page 42Annex A: City of Arroyo Grande Deferred; Limited CIP funding has Recreation PDM Grant, been allocated to Maintenance General this project. In a Determine cost effective mitigation strategies for Services, Little to Funds, Capital catastrophic flood AG.5 Flood Newsom Springs area Community no cost Improvement High Deferred event, this area Development, Funds, Staff will be negatively Emergency Time impacted. Staff Preparedness and fiscal constraints are on oin . Recreation PDM Grant, Maintenance Conduct a cost to benefit analysis of a flood water Services, General Deferred; Limited AG.6 Flood diversion system for the City of Arroyo Grande's critical Community Less than Funds, Capital High Deferred availability of staff infrastructure and the flood vulnerable Commercial $10,000 Improvement and fiscal District Development, Funds, Staff resources. Emergency Time Preparedness, Deferred; URM Buildings in the Village area should have been PDM Grant, completely General retrofitted. AG.7 I Earthquake I Identify and catalog seismically vulnerable structures Emergency I Little to Funds, Capital High Deferred Unknown Preparedness no cost Improvement cataloging of Funds, Staff potentially other Time structures throughout the city. Staff and fiscal constraints onqoing. San Luis Obispo County Local Hazard Mitigation Plan Annex A.33 City of Arroyo Grande I February 2020 •••
Item 8.h. - Page 43Annex A: City of Arroyo Grande PDM Grant, In progress; Link General County of SLO AG.8* I Earthquake I Notify public of location of earthquake faults Emergency I Little to Funds, Capital High 1 year OES Earthquake Preparedness no cost Improvement Plan to Fire Funds, Staff Department & Time City websites. PDM Grant, General In progress; Will AG.9 I Earth uake I Notify public of location of Seismic vulnerable Emergency I Little to Funds, Capital High 1 year be released upon q structures Preparedness no cost Improvement completion of Funds, Staff cataloging. Time In progress; Adoption of Countywide California Fire Community Fire Safe Council, Wildfire Protection AG.10 I Encourage the 100' Defensible Space around Department, Little to General Fund, Plan (CWPP). * Fire Community no cost Fire High 1 year Pursue grant structures in the Wildland Urban Interface funding to Development Prevention complete city-Grant specific CWPP Limited availability of staff and fiscal resources. California Fire Fire Safe Council, AG.11 I Fire I Continue weed abatement program Department, Little to General Fund, I High I Annual I Annual Community no cost Fire implementation Development Prevention Grant AG.12 I Enforce building codes and ordinances that eliminate Fire I Little to California Fire 1 I I Annual * Fire Department, Safe Council, High Annual implementation the use of wood shake roofs no cost General Fund, San Luis Obispo County Local Hazard Mitigation Plan Annex A.34 City of Arroyo Grande I February 2020 •••
Item 8.h. - Page 44Annex A: City of Arroyo Grande Community I Fire Development Prevention Grant California Fire Fire Safe Council, AG.13 Fire Enforce codes and ordinances that require fire Department, Little to General Fund, I High I Annual I Annual * sprinkler fire systems in all new structures constructed. Community no cost Fire implementation Development Prevention Grant In progress; Existing county-wide plans with Emergency PDM Grant, evacuation Create a community specific Evacuation Plan, including Preparedness General components. AG.14 I Dam Failure public outreach and education and identify public /Arroyo Less than Funds, Capital High 3-5 yrs. County Fire Chiefs $10,000 Improvement have identified warning mechanisms and strategies. Grande Police Funds, Staff community-Department Time specific evacuation plans as a strategic riorit . Emergency PDM Grant, Deferred; Will be General AG 15 I D F .1 I Exercise Evacuation Plan for effectiveness, including Preparedness Less than Funds, Capital considered upon . am aI ure bl" . 1 /Arroyo $10,000 Improvement High 3-5 yrs. community-pu Ic warning e ements. Grande Police specific Funds, Staff Department Time evacuation plans. Emergency PDM Grant, Deferred; Will be General Preparedness Less than Funds, Capital considered upon AG.16 I Dam Failure I Revise Evacuation plan as appropriate /Arroyo $10,000 Improvement High 3-5 yrs. community-Grande Police Funds, Staff specific Department Time evacuation plans. San Luis Obispo County Local Hazard Mitigation Plan Annex A.35 City of Arroyo Grande I February 2020 •••
Item 8.h. - Page 45ID AG.17 Hazard(s) Mitigated Drought Description/Background/Benefits Mitigate Drought Risk Through Water Availability Insurance. Continue to monitor well levels to prevent seawater intrusion while pursuing opportunities for regional recycled water projects that will result in groundwater injection. ........ $30 million-$50 Public Works; million Community regional! Development y; city's Department portion currently unknown Potential Funding PDM Grant, General Funds, Capital Improvement Funds, Staff Time Annex A: City of Arroyo Grande Priority Timeline Medium Annual Status/ Implementation Notes New Benefits: Avoiding seawater intrusion; ensuring adequate water supply of the 5-cities region San Luis Obispo County Local Hazard Mitigation Plan Annex A.36 City of Arroyo Grande I February 2020 •••
Annex A: City of Arroyo Grande
San Luis Obispo County Local Hazard Mitigation Plan
City of Arroyo Grande | February 2020 Annex A.37
Implementation and Maintenance
Moving forward, the City will use the mitigation action table in the previous section to track progress on
implementation of each project. Implementation of the plan overall is discussed in 8 in the Base Plan.
A.6.1 Incorporation into Existing Planning Mechanisms
The information contained within this plan, including results from the Vulnerability Assessment, and the
Mitigation Strategy will be used by the City to help inform updates and the development of local plans,
programs and policies. The Engineering Division may utilize the hazard information when implementing the
information when reviewing a site plan or other type of development applications. The City will also incorporate
this LHMP into the Safety Element of their General Plan, as recommended by Assembly Bill (AB) 2140.
As noted in Plan Implementation, the HMPC representatives from Arroyo Grande will report on efforts
to integrate the hazard mitigation plan into local plans, programs and policies and will report on these efforts at
the annual HMPC plan review meeting.
A.6.2 Monitoring, Evaluation and Updating the Plan
The City will follow the procedures to monitor, review, and update this plan in accordance with San Luis Obispo
County as outlined in 8 of the Base Plan. The City will continue to involve the public in mitigation, as
described in 8.3 of the Base Plan. The Fire Chief for the Five Cities Fire Authority will be responsible
for representing the City in the County HMPC, and for coordination with City staff and departments during plan
updates. The City realizes it is important to review the plan regularly and update it every five years in accordance
with the Disaster Mitigation Act Requirements as well as other State of California requirements.
Item 8.h. - Page 46
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Section
City's Community Investment Program and the Planning and Building Divisions may utilize the hazard
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Section 8
Section
subsection