OAAC Adapt Projects
January 2025
Oakland Alameda Adaptation Committee (OAAC):
A coalition of shoreline communities, agencies and stakeholders working to coordinate the Oakland Alameda sub-region flood and adaptation projects to protect and restore water quality, habitat, equity, transportation and community resilience.
Agency Partners
OAAC Adapt: Project Partners
Community Partners Consultants
OAAC ADAPT Projects
• The Subregional Adaptation Plan is a
long-term plan that details preliminary
strategies and pathways for shoreline
communities to take as the climate and
shorelines change over time
• The Oakland Alameda Estuary Project
is a near-term sea level rise adaptation
design concept to address increased
coastal, stormwater, and groundwater
flooding for up to two feet of sea level
rise over the coming decades
• The Bay Farm Island Adaptation
Project is a near-term sea level rise
adaptation design project to address
compound flooding and up to two feet of
sea level rise and long-term planning
coordination.
Sea Level Rise Project Criteria
Near Term Long Term
2060 - 2080
35 to 50-year adaptation project lifespan
2' of sea level rise
Protect to elevation +14’
2100+
Build upon near term projects
3.5 - 7' of sea level rise
Protect to elevation +17’
Precipitation
Sea level rise and
coastal flooding
Rising groundwater
Combined Adaptation:
Shoreline = seawalls, levees and
redevelopment at higher elevations
Inland = green and grey
detention basins
Potential Adaptation Measures
Levee and Seawall
with Bay Trail
Levee with Tidal
Marsh
Pump StationsGreen detention basin
Levee with Beach
Access
Levee with
Waterfront Park
Seawall with
Tidal Marsh
Oakland-Alameda Estuary Near-Term
Adaptation Project
Project Area:
Oakland-Alameda Estuary
+7.5
<7.5
<10.0
+9.0
+10.5
+12.0
+10.0 +9.0 +10.5
+12.0
Posey Tube
Entrance
<6.0
Webster Tube
Entrance
<6.0
MARINA VILLAGE PKWY
<7.0
Shoreline Analysis: Alameda
+10.5
+9.0
+13.5
+10.5
+12.0
<6.0
+7.5
EXTENDED
STAY AMERICA
FFE +12.5
OAKMONT
FFE +10.5
SHIPWAYS
BOHOL CIRCLE
IMMIGRANT
PARK
SHORELINE
PARK
BARNHILL MARINA
FLOATING HOMES
CARDINAL
POINT
MARINER
SQUARE
MARINA VILLAGE
Shoreline Analysis: Oakland
<8.0
<8.0
EMBARCADERO WEST
Estuary Park
Proposed
+12.5
9.0 +
+10.0
+10.010.0+
+10.5
OAK ST
HARRISON ST
WEBSTER ST
BROADWAY
ALICE ST
JACKSNO ST
MADISON ST
FRANKLIN ST
CLAY ST
JEFFERSON ST
FALLON ST
WATER ST
9.0+
9.0+
+11.5
+10.5
+11.0
+11.0 11.0++11.0
<10.0+ +11.0
+10.0
10.0+
+10.5
+10.5
KTVU
RESIDENTIAL
FFE +10.5
<8.0
+10.0
WASHINGTON ST
ALAMEDA
BOHOL CIRCLE IMMIGRANT PARK - SHIPWAYS
EXTENDED STAY
AMERICA
FFE +12.5
BARNHILL MARINA
FLOATING HOMES
OAKMONT
FFE +10.5
BOHOL CIRCLE
IMMIGRANT
PARK
+10.5
MARINER SQUARE DR
TURNING
BASIN
+7.5
+12.0
POSEY TUBE
ENTRANCE
WEBSTER TUBE
ENTRANCE
Levee at
Elevation
14.0 +10.5
+10.5
+7.5
+12.0
+9.0
+10.5
FFE
+13.5
Seawall at
Elevation
14.0 MARINER SQUARE
Near-Term Adaptation Concept
Bohol Circle Immigrant Park to Shipways
OAKLAND ALAMEDA ESTUARY
Seawall at
Elevation 14.0
Raised Pathway
(with landside
retaining wall)
Levee at
Elevation 14.0
Landside Public
Realm Improvements
COLLEGE OF
ALAMEDA
DOCK Q
SHIPWAYS
MARINA VILLAGE
YACHT HARBOUR
+12.0
+9.0
+10.5
+10.5
+12.0
RESEARCH
PARK
FFE+12.0 +10.5
+12.0
Levee - Tie into
Elevation 12.0
high ground at
Shoreline Park
+12.0
+9.0
+10.0
SHORELINE
PARK
RESIDENTIAL
EXTENDED
STAY AMERICA
OAKLAND ALAMEDA ESTUARY
Near-Term Adaptation Concept
Shipways to Marina Village
Shipways new
development – fill to
14.0 Levee at
Elevation 14.0
Landside Public
Realm
ImprovementsRedevelop - fill
to 14.0
Upland Levee at 14.0
Marsh Terrace &
Gravel Beach Below
ALAMEDA
SHIPWAYS TO MARINA VILLAGE
Alameda Shoreline – Near Term Adaptation
Elevated Seawall
Build new Seawall water side
of existing wall.
Environmental permits and
agency coordination required.
Existing +10.5
Proposed +14.0
Existing Elevations at Mariner Square
Section 1 – Typical condition at
Cardinal Point and Mariner Square Drive
Levee elevated to +14.0.
Over 6 feet tall relative to
adjacent grade.
12.0 (+2’ Sea Level Rise)
6.37 MHHW
Alameda Shoreline – Near Term Adaptation
Shoreline Levee
Existing elevation
+7.5 is below
today’s King Tide
Section 2 – Typical condition at Barnhill Marina
Alameda Shoreline – Near Term Adaptation
Existing Shoreline (elev. 10.5)
6.37 MHHW
12.0 (+2’-0” SLR)
+14.0
SLOPE ENHANCEMENT & PLANTING FOR ROCK AND
LOG INTERTIDAL HABITATPICNIC AREA UPLAND HABITAT
PLANTING
LEVEE & IMPROVED
BAY TRAIL
View of shoreline protection and improvements near hotel Proposed fill to
elevate grade at
shoreline and
inland Add space for
habitat on
water side
Alameda Shoreline – Near Term Adaptation
Raised Grade at Shoreline and Inland
Section 4 – Typical condition at Marina Village
• System is designed for 10-year storm
• Volume of water that does not fit in storm
drain system after 100 yr, 24-hr storm:
36.6 acre-feet
• Analysis includes stormwater detention for
today's volume with added capacity for
future increases
Inland Flooding Analysis
Stormwater Modeling: Northside of Alameda
Estimated Future Precipitation %
Increase With Climate Change
San Francisco Bay Area Domain SSP5-8.5
Potential Inland Detention Basin Locations
• Basins store more water
• Storm drains pump water to
bay at low tides within 72 hours
• Most polluted street runoff
heads to storm drain system
Alameda Inland – Detention
Basin Concept Plans
Alameda #2 & #3
WEBSTER ST
MARINA VILLAGE PKWY
Ground Level
+7.24
+9.0
EXISTING SIDEWALK
6 8
Bubble Up
+6.8
Invert
+2.5
Ground Level +7.29
Invert Elevation
+2.03
6 5
NEW WALK CONNECT
TO POSEY TUBE PATH
TYNAN
Bay Farm Island Adaptation Project
BFI Project: Current Flood Conditions
BFI Project: Near-Term Project Area
NORTHERN SHORELINE LAGOON OUTFALL VETERANS COURT
MARSH
CREATION
NEW PUMP STATION
& OUTFALL
ROCK & WOOD GROINS
& FEEDER BEACHES
ROCK & WOOD GROINS
& FEEDER BEACHES
LEVEE &
BAY TRAIL
BFI Project: Preferred Near-Term Alternative
Nature-Based Solutions Levee & Floodwall & Nature-Based Solutions MARSH
CREATION
NEW PUMP STATION
& OUTFALL
ROCK & WOOD GROINS
& FEEDER BEACHES
ROCK & WOOD GROINS
& FEEDER BEACHES
• Nature-based Solutions
• Levee: Lagoon to Veterans Court
• Lagoon: New tide gate, pump station & gravity pipe
• Marsh expansion
BFI Project: Levee / Bay Trail / Marsh Expansion
BFI Project: Levee, Bay Trail & Nature-Based Solutions
Perspective View of Typical Bay Trail condition
BFI: Pump Station & Tide Gate Replacement
• Interior drainage to comply with FEMA 65.10
• Maintain existing lagoon circulation & stormwater management goals • Clarify Operations & Maintenance responsibilities
• Obtain right-of-way or easements for gravity pipe
PUBLIC
OVERLOOK
BAY TRAIL
BACKFILL
VARIES
BFI Project: Veterans Court Adaptation
• Expands marsh to enhance habitat
• Shortens road to Veterans Park
• Maintains 20-25 parking spaces,
including ADA spaces.
• Does not include wooden
bicycle/pedestrian bridge – analysis
for replacement in near term
BFI Project: Bay Trail Bridge Adaptation Alternatives (Phase 2) Alternative 1
Bridge Relocation Outboard
Alternative 2
Underpass Crossing
Alternative 3
Bridge Over Land
Alternative 4
At Grade Crossing
Photo: San Francisco Chronicle
FEMA BRIC Grant: Near-term Project (Phase 1)
BRIC federal $50M
(90%)
Non-federal $5.5M
(10%)
Total $55.5M
Recommended for
further review by FEMA
Start: 2025?
Construction: 2030
Subregional Adaptation Planning
January 2025
Subregional Adaptation Plan Process
Oct 2023 – Mar 2024
Charting the Course Strategy Development
Apr 2024 – Mar 2025
Public Input &
Strategy Refinement
Plan Completion &
Council Hearings
Apr – Jun 2025 Jul – Sep 2025
OAAC Adapt Projects
January 2025
Learn more:
www.alamedaca.gov/OaklandAlamedaAdaptationCommittee