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Browse all Contra Costa County, CA

#818971

Newhall Park Water Quality Project, Concord, CA

Description. The Project is located at Newhall Community Park, City of Concord, California. The work consists of mobilization; traffic control; public convenience; installation of construction fencing; storm water pollution and erosion control; clearing and grubbing, tree trimming, tree and root protection; protection of existing improvements; removal and installation of existing signs; removal of benches; dredging of approximately 4,500 cubic yards of material from the upper pond and 5,500 cubic yards of material from the lower pond including filtering, drying and spreading of dredged material; landscape improvements with new temporary irrigation; miscellaneous storm drain improvements; and all other work shown on the Plans and as specified in the Project Manual.

Post Date: 04/14/2026 Bid Date: 05/07/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, C27 - *Landscaping Contractor & Groundskeeping, Xeriscaping, Hardscaping, Weed Control Grubbing Sodding Lawn Mowing Mulching, Stormwater Drainage: Manholes & Valve Boxes, Ditches, Culverts, Shoulder Work, Grates, French Drains, Dewatering, Water Swales, C27 - Water Supply & Irrigation Contractor: Landscaping Water Sprinkler System, Dredging Contractor & Water Excavation: Removing Sediment & Debris from Lakes, Rivers, Harbors, Coastal Protection
#819615

City of Antioch Marina Bathroom Repair, Antioch, CA

This project includes structural masonry reconstruction, full or partial replacement of the plumbing system, required electrical repairs, installation of a new commercial door and frame system, and comprehensive surface preparation and painting. All repaired and impacted areas shall be restored to match existing adjacent finishes. The objective of this project is to return the facility to a safe, functional, and code-compliant condition while maintaining the original appearance and durability of the structure.

Post Date: 04/17/2026 Bid Date: 05/07/2026 Trades: C29 - Masonry Contractor, Precast Concrete; Mortar Repair, Tuckpointing, Brick Pointing, Finishing Joints, C36 - Plumbing Contractor: Water Supply, Reverse Osmosis (RO), Water Heaters, Water Meters, Leak Detection, Flow & Backflow, Acoustic , C7 - Low Voltage Electrical Contractor (LVE) <91V: Electrician, Fiberoptic, Wire & Cabling, Telephone, Cable Television (TV), D28 - Door Service Contractor: Including Bay Doors, Fire Doors, Gates, Activating Devices & Overhead/Garage Door Opener, C33 - Painting Contractor: Exterior/Interior Finish, Decorating; Interior Wallpaper & Wall Coverings, Class B - *General Building Contractor GBC: Building Construction, Enclosed Structures; Opportunities for Subcontractors
#815611

NEW BID DATE: Webb Tract Wetland Restoration Project, Contra Costa County, CA

The work consists of constructing and restoring approximately 3,500 acres of wetlands on Webb Tract, including building and heightening berms, modifying toe-ditches, grading, constructing access roads, constructing water control structures, clearing and grubbing, furnishing and planting vegetation, and other appurtenant work as specified and shown on the drawings.

Post Date: 03/23/2026 Bid Date: 05/12/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors
#819179

Sycamore Drive Traffic Calming Improvements, PW 282-22, Antioch, CA

The project will consist of installing traffic striping, pavement markings and markers and traffic calming devices including all work shown on the project plans

Post Date: 04/15/2026 Bid Date: 05/12/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, Pavement Marking, Traffic Striping, Raised Pavement Markers (RPMs) & Reflectors, Centerline Rumble Strips
#820178

Lafayette Sewer Renovations, Phase 16, Martinez CA

The work generally consists of renovation of approximately 11,600 LF of gravity sewer mains varying in size from 6-inch to 24-inch trunk sewers. Renovation methods include, open cut trench, pipe burst, cured-in-place pipe (CIPP) and horizontal directional drilling methods.

Post Date: 04/21/2026 Bid Date: 05/12/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, Public Utilities, Water, Sewer & Gas Repairs NIGP 910-63, C34 - Pipeline Contractor: Water Mains, Sewer Lines, Septic Lines; CIPP Pipe liners, Pipe Inspection, Video & Robotic Cameras
#820288

FY 25-26 Pavement Maintenance & Rehabilitation Project, Martinez, CA

Project Description: Work includes the maintenance of existing pavement and improvements and constructing new ADA improvements on various streets within the City of Martinez. The work includes: Maintenance of existing pavement and roadway improvements including crack sealing, base repairs, mill and overlay, slurry seal, cape seal, concrete curb ramps, adjusting utility covers, and roadway striping and all appurtenant work required to complete the project in accordance with the projects plans and specifications.

Post Date: 04/22/2026 Bid Date: 05/12/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors
#818960

Oak Grove Fiber Project, Concord, CA

Description: The work consists of mobilization, traffic control, installation of fiber optic communications infrastructure including fiber optic cable, conduit, pull boxes, splice closures, and patch panels, fiber optic splicing and testing, utility locating and potholing, and all other work shown on the Plans and as specified in the Project Manual and all other work as specified in these Special Conditions, Technical Provisions, and as shown on the Plans. he Project is located along Oak Grove Road between Monument Boulevard and Ygnacio Valley High School Driveway in City of Concord, California.
Post Date: 04/14/2026 Bid Date: 05/14/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, C7 - Low Voltage Electrical Contractor (LVE) <91V: Electrician, Fiberoptic, Wire & Cabling, Telephone, Cable Television (TV)
#819621

Harbor Street Safety Improvements , Pittsburg, CA

The Project proposes a series of improvements to signal hardware (cabinets, signal heads, signal pole, loops, backplates, controllers, backup battery systems, and cameras), installing streetlights, roadway segment improvements, ADA curb ramp improvements, rectangular rapid flashing beacons, and upgrading pedestrian crossings with enhanced safety features along Harbor Street from Buchanan Road to East 3rd Street. The total project budget, including design and construction, is approximately $2,612,700 (two million six hundred twelve). All right-of-way required for the Project is currently owned and operated by the City. The Project will be scaled to remain within the Project budget, and the City will cover the match required for the improvements in the jurisdiction. The consultant is expected to analyze the existing roadway and recommend cost-effective safety improvements

Post Date: 04/17/2026 Bid Date: 05/14/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, C8 - Concrete Contractor: Pavement, Driveways, Sidewalks, Curbs, Gutters, Flatwork, ADA Ramps Pedestrian Improvements, CIP Concrete, C31 - Construction Zone Traffic Control Contractor, Flashing Beacons, C12 - Earthwork & Paving Contractor: Pavement Preservation, Resurface, Slurry Seal, High Friction, Milling, Land Clearing, Trails/Path, Traffic Signals, Calming, Intelligent Transportation (ITS): Automated Enforcement Systems (AES) & Speed Traffic Recorders (TMS)
#821467

Verde ES Play Structure Replacement Project , Richmond, CA

Scope of Work: This Project involves removing and replacing the playground and adjacent paving and landscaping. Install a new drainage system. Remove and replace paving for the new fire lane and student drop-off. Provide miscellaneous accessibility upgrades.

Post Date: 04/29/2026 Bid Date: 05/14/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, C27 - *Landscaping Contractor & Groundskeeping, Xeriscaping, Hardscaping, Weed Control Grubbing Sodding Lawn Mowing Mulching
#820734

Marina Sheds A – D Upgrade, Pittsburg, CA

The Pittsburg Marina is located at the confluence of the Sacramento and San Joaquin Rivers. See attached map for the project location. The marina sheds are equipped with galvanized rain gutter systems that have experienced significant corrosion due to long-term exposure to marine environmental conditions. The deterioration has resulted in reduced functionality and maintenance challenge. The scope includes but is not limited to preparation of biddable Plans, Specifications, and Estimate (PS&E) for removal and installation of new gutter system. The City seeks professional services to evaluate the current condition and design a durable, cost-effective solution
Post Date: 04/24/2026 Bid Date: 05/15/2026 Trades: Class B - *General Building Contractor GBC: Building Construction, Enclosed Structures; Opportunities for Subcontractors, Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, C8 - Concrete Contractor: Pavement, Driveways, Sidewalks, Curbs, Gutters, Flatwork, ADA Ramps Pedestrian Improvements, CIP Concrete, D41 - Raingutters Installation Contractor: Cladding, Siding & Decking: Installation & Repairs; Pressure Washing Buildings, Design/Build Contractor; Design/Bid/Build Entity (DBBE) or Design/Bid/Build (DBB)
#822613

Betty Reid Soskin Building 300 Flooring Replacement, Richmond, CA

Scope of Work: The project involves providing hazardous-material flooring and rubber-base demolition, preparing concrete slabs for new flooring, installing new flooring, and installing rubber base.

Post Date: 05/06/2026 Bid Date: 05/18/2026 Trades: C15 - Floor Covering and Flooring Contractor, Including Carpet, Wood, Marble, Tile, Ceramic, Linoleum, Vinyl, Hazardous Waste Transportation, Disposal or Treatment Services (HAZ): Disposal Facility Required NAICS 562211
#822898

Basketball Court Lighting, Brentwood, CA

The City of Brentwood requests proposals from qualified individuals or firms for engineering design services for its Basketball Court Lighting

Post Date: 05/07/2026 Bid Date: 05/18/2026 Trades: *A&E Architecture & Engineering: Design Services, Consulting & Planning: Professional, EOR Services, Feasibility Study
#818979

Fire Suppression System Monitoring, Maintenance, and Repair Services, San Ramon, CA

The City requires Fire Suppression System Monitoring, Maintenance, and Repair Services (Services) which include, but are not limited to, inspection, testing, certification, monitoring, troubleshooting, repair, replacement, integration, and maintenance of fire suppression systems, fire alarm systems, fire alarm control panels (FACP), fire extinguishers, kitchen hood suppression systems, private hydrants, and related components. Services may be requested on a routine, preventative, emergency, or as-needed basis

Post Date: 04/14/2026 Bid Date: 05/19/2026 Trades: C16 - Fire Protection: Fire Alarm, Smoke Detection & Fire Suppression Contractor, Fire Extinguishers, Pumps, Hydrants & Inspections, C7 - Low Voltage Electrical Contractor (LVE) <91V: Electrician, Fiberoptic, Wire & Cabling, Telephone, Cable Television (TV)
#818981

Aquatic and Water Feature Equipment Maintenance, Repair, and Supply Services, San Ramon, CA

The City requires Aquatic and Water Feature Equipment Maintenance, Repair, and Supply Services (Services) at City-owned and operated aquatic facilities and water features. The Services include, but are not limited to, provision, delivery, installation, replacement, integration, programming, maintenance, troubleshooting, and/or repair of aquatic and water feature equipment, systems, controls, and related components, and shall be performed in accordance with the specifications, standards, and requirements set forth in this Request for Proposals (RFP). Services may be requested on a routine, preventative, emergency, or as-needed basis

Post Date: 04/14/2026 Bid Date: 05/19/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, D21 - Machinery and Pumps Contractor; Machinery Repair, Grapple Rebuilds, Motors & Variable Frequency Drives (VFD's), Building Maintenance, Installation & Repair Services: General Appliance Repair, Make Ready, Minor Renovations & Repairs
#822489

Buchanan Road Slope Project, Pittsburg, CA

The scope of work consist of the repair and re-establishment of the slope which will include removal of unsuitable soil, rebuilding and strengthening the terraces with suitable imported material, geotechnical fabrics, and all other work as needed to complete the project in accordance with the Plans, Specifications and as directed by the Engineer

Post Date: 05/05/2026 Bid Date: 05/20/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, Rock Slope Construction Mitigation & Stabilization
#822490

Corporation Yard Groundwater Monitoring Wells Project, Pittsburg, CA

The Project is located at 357 East 12th Street, Pittsburg, California, and is described as follows: The scope of work for this Contract includes installation of groundwater monitoring wells, exploratory soil borings, air/soil-vapor samplings and all other work necessary to complete the project
Post Date: 05/05/2026 Bid Date: 05/20/2026 Trades: Hydrology, Hydrologic, Hydrogeological Services & Hydrographic Surveying: Groundwater Monitoring, Flow Analysis and Modeling, Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors
#820282

Piper Road Sinkhole & Culvert Repair Project, Martinez, CA

Work Description: The work consists of replacing a 52x40 corrugated metal pipe arch with a 54 reinforced concrete pipe, trench excavation and backfill, placement of rock slope protection, and striping.

Post Date: 04/22/2026 Bid Date: 05/26/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors
#822895

Downtown & Veterans Park Banner Program, Brentwood, CA

The City of Brentwood is requesting proposals from qualified firms or individuals to provide banner design, production, installation, removal, and storage services for the Citys Downtown and Veterans Park Banner Program

Post Date: 05/07/2026 Bid Date: 05/26/2026 Trades: Class A - *General Engineering Contractor GEC: Heavy & Civil Engineering Construction, Infrastructure; Opportunities for Subcontractors, *A&E Architecture & Engineering: Design Services, Consulting & Planning: Professional, EOR Services, Feasibility Study, C45 - Signs & Signage Contractor: (Non-Electrical & Electrical) Digital & Video Displays, Tower Clocks, Billboards, Scoreboards, Wayfi