DEL SECCO DIAMOND CORE & SAW INC
California contractor license #538606 · Hayward, Alameda County
License
- License number
- 538606
- Status
- Clear
- Classifications
- C-8 Concrete Contractor
- C-61/D-06 Concrete Related Services
- Business type
- Corporation
- Issued
- Aug 18, 1988
- Expires
- Aug 31, 2028
- Workers' compensation
- Workers' Compensation Insurance — Midwest Employers Casualty Company
- Contractor's bond
- $25,000 — American Contractors Indemnity Company
- DIR public works registration
- Registered through Jun 30, 2027
From the California Contractors State License Board (CSLB) public license file, last updated Jul 20, 2026. Verify license #538606 on CSLB's License Check.
California public works
DEL SECCO DIAMOND CORE & SAW INC appears on 47 public works projects registered with the California Department of Industrial Relations, for 38 awarding bodies between 2021 and 2026.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| Mar 17, 2026 | WWTP HVAC ReplacementsSewer & wastewater | Dublin San Ramon Services District | Subcontractor | $4,186,000 |
| Dec 22, 2025 | 2970 16th St PSHOther | Mayor''s Office of Housing and Community Development | Subcontractor | $73,600,000 |
| Dec 4, 2025 | Batmale Emergency GeneratorElectrical, low voltage & AV | San Francisco Community College District | Subcontractor | $897,630 |
| Sep 30, 2025 | FY2026 Sidewalk, Curb & Gutter ProjectPaving & streets | City of Palo Alto | Subcontractor | $1,186,515 |
| Sep 15, 2025 | Occidental Avenue Traffic CalmingTraffic & signals | City of Burlingame | Subcontractor | $443,646 |
| Sep 4, 2025 | ETSU 1B - Secondary & Effluent Fac. UpgrSewer & wastewater | Union Sanitary District | Subcontractor | $324,530,134 |
| Aug 25, 2025 | 2025 Annual Street Resurfacing PavementPaving & streets | City of San Carlos | Subcontractor | $6,146,719 |
| Jul 8, 2025 | East Bayshore Pedestrian&Cyclist ProjectOther | City of East Palo Alto | Subcontractor | $3,156,486 |
| Jun 24, 2025 | Wildcat Canyon Road-Slope RepairPaving & streets | Contra Costa County Public Works Department | Subcontractor | $2,090,191 |
| Jun 5, 2025 | 39-Inch Main Trunk No. 1 RenovationBuildings & facilities | Central Contra Costa Sanitary District | Subcontractor | $2,285,325 |
| May 14, 2025 | CDBG Ramps and PathsPaving & streets | City of South San Francisco | Subcontractor | $723,267 |
| May 12, 2025 | On-Call Concrete Repair ServicesConcrete & masonry | City of Sunnyvale | Subcontractor | $1,750,000 |
| May 6, 2025 | Winter Storms 2024-25 Damaged Site - CavStorm drain & flood control | County of Sonoma – SPI _ Sonoma Public Infrastructure | Subcontractor | $2,308,365 |
| May 6, 2025 | Dry Creek Rd Bridge over Dry CrkRDS15-22Bridges & structures | Napa County Public Works | Subcontractor | $6,331,821 |
| May 5, 2025 | 2025 Local Streets ADA Ramp #10Paving & streets | City of San Jose | Subcontractor | $596,178 |
| Mar 26, 2025 | PA System Upgrade Package 4: (7) Seven MBuildings & facilities | San Francisco Unified School District | Subcontractor | $8,669,000 |
| Mar 17, 2025 | Sharp Park PDA Ped ProjectParks, landscape & fields | City of Pacifica | Subcontractor | $1,639,478 |
| Feb 24, 2025 | 1174 Folsom RehabOther | City and County of San Francisco Department of Homelessness and Supportive Housi | Subcontractor | $1,000,000 |
| Dec 19, 2024 | Lafayette Sewer Renovations, Phase 15Sewer & wastewater | Central Contra Costa Sanitary District | Subcontractor | $4,220,550 |
| Nov 26, 2024 | MWWTP Secondary Clarifier Rehab. Phase 4Sewer & wastewater | EBMUD Wastewater Engineering Division | Subcontractor | $6,766,000 |
| Sep 25, 2024 | Oak Days RenovationBuildings & facilities | 8350 EDES, LLC | Subcontractor | $13,482,926 |
| Aug 19, 2024 | Rollins Road Sewer Force Main ImproveSewer & wastewater | City of Burlingame | Subcontractor | $2,817,600 |
| Jul 8, 2024 | 2024 Street Resurfacing ProjectPaving & streets | City of Burlingame | Subcontractor | — |
| Jul 1, 2024 | UCSF-WHHS CANCER CENTERBuildings & facilities | WASHINGTON HOSPITAL HEALTHCARE SYSTEM | Subcontractor | $11,741,656 |
| Jun 10, 2024 | FY2024 Sidewalk Repair ADA ImprovementPaving & streets | City of Palo Alto | Subcontractor | $1,586,191 |
Most recent 25 of 47. Contract amounts are the whole project's, as the awarding body reported them to DIR (reported since July 2024); a role is "Prime" when the awarding body registered the contractor on the project.
Awarding bodies it works for most
- City of Burlingame · 4 projects
- Santa Clara Valley Water District - CCSU · 2 projects
- Central Contra Costa Sanitary District · 2 projects
- City of Sunnyvale · 2 projects
- City of San Jose · 2 projects
- EBMUD Wastewater Engineering Division · 2 projects
- County of Sonoma – SPI _ Sonoma Public Infrastructure · 2 projects
- Mayor''s Office of Housing and Community Development · 1 project
- Vallejo Flood and Wastewater District · 1 project
- City of San Jose, Purchasing Dept · 1 project
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