Bonita School Road Bridge (51C-0230) Replacement

Bonita School Road Bridge (51C-0230) Replacement

The Santa Barbara County Public Works Department proposes the replacement of the Bonita School Road bridge and embankment fill with a full span bridge. Project components include a new 2,321 foot-long, full span bridge. Roadway approaches to conform to the new bridge profile and existing access roads. Modifications as required to levee ramps to maintain County Flood Control District access. Bio-retention basins to collect and treat post-construction storm water associated with project components. Americans with Disabilities Act-compliant separated pedestrian path on the bridge deck. Appropriate roadway signage and pavement markings. The proposed project involves a new bridge and deck would be up to nine feet higher than the existing crossing and up to 21 feet above the riverbed (north end). The total length of proposed improvements would be approximately 4,060 feet, including the new bridge and approach roadway modifications. The bridge superstructure would be constructed of pre-cast, pre-stressed wide-flange concrete girders. The bridge deck would be approximately 48.5 feet-wide and provide two 12-foot-wide traffic lanes (one each direction), two 8-foot-wide shoulders and one 5-foot-wide pedestrian path. The shoulders would include bike lanes in each direction. The pedestrian path would be separated from the traffic lane and shoulder by a barrier. The bridge would be supported by 15 sets of two five-foot diameter concrete columns founded on seven-foot diameter cast-in-drill-hole piles with pre-cast concrete pile caps. The top of the pile caps would be buried 13.7 feet below finished grade (riverbed) to minimize the potential for exposure by scour during peak storm flow events. Safety lighting would be provided along the east side of the bridge, composed of 30-foot-tall light standards spaced approximately 145 feet apart. Resulting light levels are estimated as approximately 0.5 foot-candles on average along the bike path.

Santa Maria

Santa Barbara

Southern California

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 5 (DOT), California Department of Water Resources (DWR), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Central Coast Region 3 (RWQCB), California State Lands Commission (SLC), Office of Historic Preservation, State Water Resources Control Board, Division of Water Quality

Transportation:Local Road (Bridge replacement of local road), Transportation:Other (replacement of existing bridge )

Redevelopment

Biological Resources, Hazards & Hazardous Materials, Hydrology/Water Quality, Noise