Project construction limits are along I-80 from Cummings Skyway in Contra Costa County to SR 29 in Solano County. The
project features of the replacement bridge and related amenities are:
ENVIRONMENTAL AND COAST GUARD ISSUES
- Replacement bridge alignment west of existing bridges.
- Provide for three mixed-flow plus one high occupancy vehicle (HOV) lane and a bicycle/pedestrian lane.
- Suspension bridge type requires only two main piers.
- New pedestrian/bicycle lane will be provided on replacement bridge; new visual access on both northern and southern shoreline. 1927 bridge superstructure and towers will be demolished and removed; old pier foundations will remain at height of existing fender system to provide protection for remaining 1958 bridge.
- Caltrans will rebuild the Crockett Interchange as part of the bridge project; Contra Costa County to extend Cummings Skyway with Caltrans' participation in funding - completion targeted during 1998.
- Existing Caltrans maintenance facility in Vallejo will be relocated.
- New bridge construction consists of three major contracts: replace existing westbound bridge mainspan; replace westbound approach, replace Crockett Interchange and construct environmental mitigation; and build replacement maintenance facility.
An Environmental Impact Statement (EIS) is being prepared under National Environmental Policy Act (NEPA). The project is statutorily exempt under California Environmental Quality Act (CEQA). Draft EIS circulated in January 1997, with a public hearing in February, 1997. Final EIS and Record of Decision (ROD) targeted for January-February, 1998. FHWA is the lead agency; the US Coast Guard is a cooperating agency. Alternatives analyzed in the EIS: No build; retrofit & rehabilitation of the existing bridge; replacement bridge on a western, eastern, and central alignment. Technical studies included: traffic forecasting & operations, air quality, noise, biology, socioeconomic & land use, right-of-way, visual, marine operations, geology/seismically, hydraulics, currents & sedimentation, water quality, hazardous wastes, historic/cultural resources, and construction traffic impacts.
Ongoing Coordination with: Coast Guard (USCG permit required), BCDC (BCDC permit required), Engineer Criteria Review Board & Design Review Board.
Coordination with State Historical Preservation Officer (SHPO), Advisory Council on Historical Preservation (ACHP) and National Preservation Service (NPS) impacts to historic property has been concluded.
Coordination with US Fish and Wildlife Service (USFWS), NMFS, ACOE, CDFG impacts to protected species and natural resources concluded.