CC 2020-07-28_11a Traffic Way Bridge Closure Alternative_PP Presentation
CONSIDERATION OF A PROJECT STATUS UPDATE AND RECOMMENDATION OF A PREFERRED CLOSURE ALTERNATIVE FOR THE TRAFFIC WAY BRIDGE REPLACEMENT PROJECT
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Tonight’s Discussion
Why are we here tonight?
Background – How did we get here?
Key Components of Design
Alternatives
Comparison of Alternatives
Future Public Outreach
Staff’s Recommendation
Questions
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Why are we here?
Significant Channel Scour impacts on the Traffic Way Bridge
Bridge has gone from a Scour Bridge Rehab Project to a full bridge replacement
Staff is seeking confirmation on a selected alternative for closure of the Traffic Way Bridge
Allow the design team to complete the environmental review and design documents with the preferred closure in a timely and cost effective manner
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Traffic Way Bridge
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Impacts of Scour
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Traffic Way Bridge Background
Bridge built in 1932 (88 years old)
Reinforced concrete structure with abutments and pier supports
Major North/South Arterial Road that spans Arroyo Grande Creek (11,000 ADT)
Scour Critical with decaying conditions project has gone from scour rehab project to full bridge replacement
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Key Components for Design
Time and Cost
Construction Access and Public Safety
Level Of Service
Bridge Alignment
Extent of Environmental Studies and Permitting
Project Phasing and Utility Relocation
Right of Way and Temporary Construction Easements
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Alternatives
No Project
Full Closure
Full Closure with Bridge Street one-way NB only
Partial Closure
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Full Closure Emergency Response
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Full Closure Traffic Impacts
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Partial Closure Emergency Response
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Partial Closure Traffic Impacts
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Future Public Outreach
Three groups impacted
First Responders
Businesses
Public
Continued work with Police and Fire throughout design
When design is further along, discussions with businesses impacted by closure (Working group of businesses impacted)
Public Outreach will be part of the CEQA and NEPA process to complete environmental review
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Staff Recommendation
Confirmation of the preferred closure alternative at this time will narrow the scope of environmental studies and design work necessary for the preferred option, thereby limiting the
time and cost of design.
Limiting the time necessary to complete design and construction is important to keep the bridge from deteriorating to a point where it may no longer be used while design of the replacement
is completed.
Because the City is required to fund 11.47% of the cost of both construction and design, staff is recommending that the full closure with Bridge Street one way NB only option be selecting
now to reduce overall costs to the City.
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QUESTIONS?
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CIP Budget
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Partial Closure Bridge Street/Branch
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Partial or Full Closure Mason/Branch
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Phasing of Partial Closure
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