Environmental Groups

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San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project Contractor
Outreach Meeting Storm Water Treatment Contract
04-0120J4 February 8, 2005
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Welcome

• Dan McElhinney
• District 4, Chief Deputy District Director

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San Francisco - Oakland Bay Bridge
East Span Seismic Safety Replacement Project
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Work Area
N
I-80
Catchment/Location No. 2 3 4 5
Drainage Area (Acres) 54.3 12.1 17.5 47.2
EBMUD
Toll Plaza
Bay Bridge
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Work Area
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Work Area
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Background

• Project Objective
• To meet the California Regional Water Quality
  Control Boards (RWQCB) Waste Discharge
  Requirements for the San Francisco-Oakland Bay
  Bridge New East Span. This requires Caltrans to
  permanently capture and treat storm water for
  approximately 131 acres of drainage area, from
  west of toll plaza to Powell Street interchange
  in Emeryville along interstate I-80. This
  treatment of storm water would improve the
  quality of water draining into Emeryville
  Crescent and San Francisco Bay, and thus would
  enhance wildlife habitat.

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Background

• Project Scope This project will involve the
  construction of pump stations, drainage pipes and
  related drainage structures to convey water
  quality flow to bioretention basins and detention
  basins where the storm water will be treated and
  then discharged into the bay. This will also
  involve planting, water pollution control and
  erosion control in the basins and along the bay
  shore line.

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Type Of Work

• Pump stations, Bypass Structures, Junction
  Structures and Inlet Structures (All
  below ground concrete structures)
• Bioretention basins, detention basins and Forebay
  Detention basin
• Maintenance Vehicle Pull Out Areas and Access
  Roads (gravel top)
• Installation of underground storm water lines and
  AC Dikes
• Planting inside the basins and mitigation
  planting along Emeryville Crescent.
• Installation of Irrigation System

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Bioretention Basin
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Bioretention Basin (During Construction)
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Bioretention Basin (During Construction)
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Applicable Agency Permits

• California Regional Water Quality Control Board
  (RWQCB)
• U. S. Army Corps of Engineers (ACOE)
• San Francisco Bay Conservation Development
  Commission (BCDC)
• U. S. Fish and Wildlife Services (USFWS)
• Refer to the Information Handout for these
  permits.

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Permits Work and Restrictions

• Replacement of all tree/shrub species impacted
  during construction with native coastal shrub
  species.
• No storage and construction maintenance
  activities in the marsh areas.
• Fenced construction area (mouse fence) for
  protection of salt marsh harvest mice.
• Work restrictions during clapper rail nesting
  season (February 1 to September 1) within
  Emeryville Crescent.

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Key Specifications

• Bioretention Basins Various components and
  materials for the construction of bioretention
  basins
• Imported Soil Media For planting inside the
  bioretention basins
• Jacked and Bored Welded Steel Pipe Furnishing
  and installing the welded steel pipe by
  horizontal jack and bore method in conformance
  with Tunnel Safety Order.
• Concrete backfill (Rapid Strength Concrete) To
  be used as concrete backfill for pipe culverts
  crossing
• I-80 traffic lanes.

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Unique Design Features

• Bioretention Basins (Total 6) Earthwork, pre
  cast concrete distribution channels, berms,
  imported soil media, planting, erosion control,
  geocomposite drain, impermeable liner,
  underdrains, MSE retaining wall,water metering
  stations, access roads.
• Pump Stations (Total 7) Underground
  cast-in-place and precast concrete structures,
  pump control panels and power supply, motor
  vehicle pull out (MVP) area, reinforced concrete
  retaining wall.

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Estimated Major Quantities

• Temporary Mouse Fence 3270 M
• Temporary Railing (Type K) 1200
  M
• Roadway Excavation
  6920 M3
• Imported Borrow
  3430 M3
• Imported Soil Media
  5050 M3
• Chain Link Fence
  506 M
• Asphalt Concrete
  3590 TONNE
• Minor Concrete for Minor Structures 295 M3
• Drainage Pipe (Various sizes) 2700
  M
• Perforated Plastic Underdrain Pipe 900 M

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Construction andPlant Establishment Schedule
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Additional Information

• Please submit questions in writing on cards
  provided.
• Any answers provided today are preliminary and
  not
• considered final until posted on the bidder
  Inquiry
• web site
• Webpage for Bidders Inquiry
• http//www.dot.ca.gov/hq/esc/oe/project_status/bid
  _inquiry.html
• Future inquiries may be addressed to the Duty
  Senior
• email Duty_Senior_District04_at_dot.ca.gov
• Mailing address P.O. Box 23660, Oakland, CA
  94623-0660
• Fax number [phone]
• All inquiries must include the contract number
  (04-0120J4)