Public Jobs

The work to be done generally consists of repair and restoration of a 250 foot stretch of northbound Happy Valley Road, approximately 0.2 mile southeast of the intersection of Happy Valley Road and Bear Creek Road. The work will reconstruct the northbound lane and restore two-way traffic to this portion of Happy Valley Road. The work includes installing an approximately 68 foot long soldier pile retaining wall with necessary safety railing and barrier on the east side of the roadway to support the reconstructed roadway and repairing settled roadway affected by the eroded embankment with structural backfill and asphalt surface. Drainage improvements will also be installed.

Work generally consists of replacing the existing 10 span concrete slab bridge with a 5 span CIP/PS slab bridge. All supports utilize CIDH concrete piles. The replacement is to be done utilizing staged construction. Approach roadway, rock slope protection, temporary water diversion, and utility relocations are among other work items.

An on-call contract for various road, flood control, airport and facilities maintenance work to provide fencing services including, but not limited to, installation, repair, replacement, or removal of fences and gates.

The work to be done generally consists of providing sweeping services with sweepers and operators to support road maintenance repairs at different County locations including, but not limited to, working in conjunction with operations and materials such as grinding operations, paving operations, tree trimming, chip aggregate clearing, roadside debris cleaning, median cleaning, and bike lane cleaning.

The project includes construction of an Aviation/ARFF/Airport Administration Building along with associated site improvements at Buchanan Field Airport, 181 John Glenn Drive, Concord, CA, 94520 (to replace the existing Contra Costa County Airport passenger terminal). The new Aviation/ARFF/Airport Administration Building will be a one-story structure including, but not limited to, two (2) apparatus bays, kitchen, offices, restrooms, training, storage, workrooms, passenger holdroom along with all associated HVAC, plumbing, fire protection, electrical, IT, civil site work, and landscaping. The work shall include providing modular buildings for temporary airport terminal operations, connecting temporary modular to electrical power, demolition of existing buildings and relocating existing main sewer and water lines. The new station will also include an emergency generator and fuel tank. The project will also include provisions for future photovoltaic roof system, car charging stations and has been designed to meet LEED Silver equivalency per the County’s standard for public buildings.

The work to be done generally consists of installing crosswalk enhancements at twosites in Rodeo. Site 1 is located at the intersection of Parker Avenue and 6th Street. Work at this site includes installation of solar rectangular rapid flashing beacons,sidewalk bulb-outs, and extension of the existing medianto create a pedestrian refuge area. Site 2 is located on 7th Street at the intersections with Napa Avenue and Vallejo Avenue. Work at Site 2 includes installation of curb ramps, a speed table, solar powered rectangular rapid flashing beacons, and a sidewalk bulb-out. Work at both sites includes installation of striping and pavement markings.

The work to be done generally consists of realigning Alhambra Valley Road away from Pinole Creek’s northern embankment, including roadway excavation and reconstruction, asphalt pavement, establishing a roadside ditch, slope grading, fence relocation, traffic control and roadway striping and signing.

The work to be done generally consists of excavating tidal channels, grading soil to create a variety of habitat zones, transporting soil, constructing levees and access roads, and planting and maintaining native vegetation.

The work to be done generally consists of pavement widening, construction ofbulb outs, asphalt path, HMA dike, curb ramps, driveway conforms, and installation of pedestrian activatedflashing beacons along Madison Avenue.