Delta Diablo
50 public works projects registered with the California Department of Industrial Relations, 2015–2026 · Antioch, Contra Costa County. Reported contract value: $190,960,599.
Projects by year
| Year | Projects | Reported contract value |
|---|---|---|
| 2026 | 2 | $164,760,000 |
| 2025 | 1 | $1,260,000 |
| 2024 | 6 | $18,113,249 |
| 2023 | 5 | $95,000 |
| 2022 | 6 | — |
| 2021 | 3 | — |
| 2020 | 1 | — |
| 2019 | 6 | — |
| 2018 | 3 | — |
| 2017 | 6 | — |
| 2016 | 2 | — |
| 2015 | 6 | — |
DIR has published contract amounts since July 2024; earlier years count projects only.
Types of work
- Other · 16
- Sewer & wastewater · 14
- Electrical, low voltage & AV · 7
- Water · 6
- Buildings & facilities · 3
- Paving & streets · 2
- Roofing · 1
- Painting & flooring · 1
Inferred by Atriam from each project's name and description, not reported by the agency.
Contractors it awards most
| Prime contractor | Projects | Reported contract value |
|---|---|---|
| FLATIRON DRAGADOS CONSTRUCTORS INC | 1 | $164,715,000 |
| SHIMMICK CONSTRUCTION COMPANY INC | 1 | $14,540,000 |
| MOUNTAIN CASCADE INC | 1 | $6,732,350 |
| Rural/Metro Fire Dept.,Inc | 1 | $95,000 |
| ACE ELECTRIC MOTOR & PUMP CO | 1 | $45,000 |
| TABER DRILLING | 1 | $25,000 |
Latest projects
| Date | Project | Prime contractor | Contract amount |
|---|---|---|---|
| Sep 9, 2026 | Secondary Process Improvements Phase 1Sewer & wastewater | FLATIRON DRAGADOS CONSTRUCTORS INC | $164,715,000 |
| Jun 1, 2026 | Fan BalancingWater | ACE ELECTRIC MOTOR & PUMP CO | $45,000 |
| Jun 16, 2025 | MH Phase 2 - Arcy Lane RehabSewer & wastewater | — | $1,260,000 |
| Sep 11, 2024 | IT OFFICE REMODEL/SITE SECURITY IMP.Painting & flooring | — | $163,100 |
| Sep 9, 2024 | HHW Management ServicesOther | — | $2,948,400 |
| Aug 14, 2024 | Cogen System ImprovementsOther | SHIMMICK CONSTRUCTION COMPANY INC | $14,540,000 |
| Jul 17, 2024 | Secondary Process Improvements - GeotechOther | TABER DRILLING | $25,000 |
| Jul 1, 2024 | Tower Trickling Filters RehabilitationOther | — | $436,749 |
| Apr 5, 2024 | POC FURNITURE INSTALLATIONOther | — | — |
| Oct 2, 2023 | Bay Point Collection System Point RepairSewer & wastewater | — | — |
| Sep 1, 2023 | Digester No. 2 RehabilitationPaving & streets | — | — |
| Jul 20, 2023 | Confined Space ServicesOther | Rural/Metro Fire Dept.,Inc | $95,000 |
| Jun 19, 2023 | Manhole, Gravity Interceptor, and EasemeSewer & wastewater | — | — |
| Jun 16, 2023 | RWF Sand Pump Piping Replacement ProjectOther | — | — |
| Dec 5, 2022 | Camp Stoneman Force Main RepairOther | — | — |
| Oct 19, 2022 | Manhole, Gravity Interceptor, and EasemeSewer & wastewater | — | — |
| Jul 11, 2022 | Willow Pass Interceptor RepairOther | — | — |
| Jun 20, 2022 | Hill Street Emergency RepairSewer & wastewater | — | — |
| Jun 16, 2022 | POC Conduit and Generator Wiring RepairElectrical, low voltage & AV | — | — |
| Jun 10, 2022 | Onsite Fueling Station and Generator FueElectrical, low voltage & AV | — | — |
| Nov 7, 2021 | RWF Sand Filter Intermittent Backwash ImOther | — | — |
| Sep 27, 2021 | Bridgehead Pipeline Replacement ProjectSewer & wastewater | — | — |
| Feb 14, 2021 | Treatment Plant Switchgear ReplacementElectrical, low voltage & AV | — | — |
| Sep 14, 2020 | Bridgehead Pipeline Replacement ProjectSewer & wastewater | — | — |
| Nov 28, 2019 | Headworks ImprovementsBuildings & facilities | — | — |
Source: California Department of Industrial Relations public works project registrations (PWC-100), updated daily by Atriam.