| HGHartung Glass Tukwila WA | Tukwila | 100–499 | ◐ LIKELY ACTIVE |
| PCPrecast Concrete LLC | Fife | 20–99 | ◐ LIKELY ACTIVE |
| SCShope Concrete LLC | Puyallup | — | ◐ LIKELY ACTIVE |
| SRSkagit Ready Mix Mcfarland Road | Mount Vernon | — | ◐ LIKELY ACTIVE |
| CICadman INC Gold Bar | Gold Bar | — | ◐ LIKELY ACTIVE |
| CSCorliss Sumner Pit | Sumner | — | ◐ LIKELY ACTIVE |
| HCHolroyd CO Nisqually Pit | Olympia | — | ◐ LIKELY ACTIVE |
| KIKyocera International | Vancouver | — | ◐ LIKELY ACTIVE |
| LNLehigh Northwest Cement CO Bellingham | Bellingham | — | ◐ LIKELY ACTIVE |
| NANorthwest Aggregates Snoqualmie | Snoqualmie | — | ◐ LIKELY ACTIVE |
| PSPlumb Signs INC S 28th | Anacortes | — | ◐ LIKELY ACTIVE |
| SGStemilt Growers Miller Street Facility | Wenatchee | — | ◐ LIKELY ACTIVE |
| WRWalrath Recycling INC | Tacoma | — | ◐ LIKELY ACTIVE |
| AAAka Airway Pit | Airway Heights | — | ◇ UNVERIFIED |
| ARAmerican Rock Products Hanford | Richland | — | ◇ UNVERIFIED |
| BCBasalite Concrete Products | Dupont | — | ◇ UNVERIFIED |
| COCadman Orchards Facility | Vancouver | — | ◇ UNVERIFIED |
| CSCadman Seattle INC | Seattle | — | ◇ UNVERIFIED |
| CMCanam Minerals INC. Dba Kleen Blast Abrasives | Tacoma | — | ◇ UNVERIFIED |
| CTCarlile Transportation Systems | Tacoma | — | ◇ UNVERIFIED |
| CPCentral Pre Mix Concrete Pasco | Pasco | — | ◇ UNVERIFIED |
| CPCentral Pre Mix Concrete Products | Spokane | — | ◇ UNVERIFIED |
| CTCertain Teed Gypsum INC | Kent | — | ◇ UNVERIFIED |
| CRColumbia River Carbonates Woodland | Woodland | — | ◇ UNVERIFIED |
| CNConcrete Norwest Getchell Pit | Lake Stevens | — | ◇ UNVERIFIED |
| CSConcrete Shop INC | Vancouver | — | ◇ UNVERIFIED |
| CDCoulee Dam Concrete / Elmer City Concrete | Coulee Dam | — | ◇ UNVERIFIED |
| CDCpm Development Corporation Quincy | Quincy | — | ◇ UNVERIFIED |
| CPCxt-precast Plant | Spokane | — | ◇ UNVERIFIED |
| ESEldorado Stone Royal City Facility | Royal City | — | ◇ UNVERIFIED |
| GNGlacier Nw Reichhold Mtca | Seattle | — | ◇ UNVERIFIED |
| HCHolroyd CO Lakewood | Lakewood | — | ◇ UNVERIFIED |
| JHJames Hardie Building Products | Tacoma | — | ◇ UNVERIFIED |
| KRKelso Rm | Kelso | — | ◇ UNVERIFIED |
| KIKoncrete Industries INC | Walla Walla | — | ◇ UNVERIFIED |
| LCLehigh Cement CO | Metaline Falls | — | ◇ UNVERIFIED |
| MMonierlifetile | Tacoma | — | ◇ UNVERIFIED |
| MMMutual Materials CO Newcastle | Bellevue | — | ◇ UNVERIFIED |
| NTNewcold Tacoma | Tacoma | — | ◇ UNVERIFIED |
| NMNorth Marina Ameron Hulbert | Everett | — | ◇ UNVERIFIED |
| OBOldcastle Buildingenvelope Vancouver | Battle Ground | — | ◇ UNVERIFIED |
| OPOldcastle Precast, INC. - Bellingham | Bellingham | — | ◇ UNVERIFIED |
| OPOlympian Precast INC | Redmond | — | ◇ UNVERIFIED |
| PGPacific Grinding Wheel CO | Marysville | — | ◇ UNVERIFIED |
| PCPcl Construction Services | Auburn | — | ◇ UNVERIFIED |
| POPort Orchard Sandg Brem Rock Pit | Bremerton | — | ◇ UNVERIFIED |
| PGPryor Giggey CO | Chehalis | — | ◇ UNVERIFIED |
| PIPyrotek Incorporated | Spokane | — | ◇ UNVERIFIED |
| RCReece Construction Company | Arlington | — | ◇ UNVERIFIED |
| SBScarsella Bros Cascade Quarry | Gold Bar | — | ◇ UNVERIFIED |
