| CWCentral Washington Concrete Othello | Othello | — | ◇ UNVERIFIED |
| CIChihuly INC | Tacoma | — | ◇ UNVERIFIED |
| CKClo K Stoneworks LLC | Bellingham | — | ◇ UNVERIFIED |
| CLCmu, LLC | Puyallup | — | ◇ UNVERIFIED |
| CNConcrete Norwest Smith Island | Everett | — | ◇ UNVERIFIED |
| CPConcrete Products of Western Washington | Puyallup | — | ◇ UNVERIFIED |
| CWCourt Walker LLC | Seattle | — | ◇ UNVERIFIED |
| CWCourt Walker LLC | Seattle | — | ◇ UNVERIFIED |
| CWCourt Walker LLC | Seattle | — | ◇ UNVERIFIED |
| CGCowden Gravel Cowden INC | Bellingham | — | ◇ UNVERIFIED |
| CPC P M Development CORP | Spokane Valley | — | ◇ UNVERIFIED |
| CPC P M Development CORP | Tyler | — | ◇ UNVERIFIED |
| CPCumberland Property | Cumberland | — | ◇ UNVERIFIED |
| DWDavid Wight Glass Art, Inc. | Bellingham | — | ◇ UNVERIFIED |
| DCDrb Company | Snohomish | — | ◇ UNVERIFIED |
| EGEfni Group INC | Washougal | — | ◇ UNVERIFIED |
| EMElectric Mirror, LLC | Everett | — | ◇ UNVERIFIED |
| EIEsmp INC | Monroe | — | ◇ UNVERIFIED |
| EGEvergreen Granite & Cabinet Su | Everett | — | ◇ UNVERIFIED |
| FCFloform Countertops | Spokane Valley | — | ◇ UNVERIFIED |
| GGGeorgia-pacific Gypsum LLC | Tacoma | — | ◇ UNVERIFIED |
| GNGlacier Northwest INC Everett | Everett | — | ◇ UNVERIFIED |
| GNGlacier Northwest INC Vancouver Ready Mix Plant | Vancouver | — | ◇ UNVERIFIED |
| GNGlacier Northwest Pioneer Aggregates | Dupont | — | ◇ UNVERIFIED |
| GNGlacier Northwest Ready-mix Plant Site | Gig Harbor | — | ◇ UNVERIFIED |
| GNGlacier Northwest Tumwater Plant | Tumwater | — | ◇ UNVERIFIED |
| GNGlacier Northwest Yelm Plant | Yelm | — | ◇ UNVERIFIED |
| GNGlacier Nw Plant Site | Aberdeen | — | ◇ UNVERIFIED |
| GGlassybaby | Seattle | — | ◇ UNVERIFIED |
| GGGranite Gallery LLC | Tumwater | — | ◇ UNVERIFIED |
| GNGranite Northwestriverscene Aggrega | Granite Falls | — | ◇ UNVERIFIED |
| GTGranite Transformations of Kin | Seattle | — | ◇ UNVERIFIED |
| GIGreenbank Inc | Coupeville | — | ◇ UNVERIFIED |
| HUHolcim US INC Ravensdale | Ravensdale | — | ◇ UNVERIFIED |
| IMIcon Materials | Seattle | — | ◇ UNVERIFIED |
| IMIcon Materials | Sumner | — | ◇ UNVERIFIED |
| IIInterpace Industries Site | Spokane | — | ◇ UNVERIFIED |
| ICInterstate Concrete and Asphalt CO Elk | Elk | — | ◇ UNVERIFIED |
| ICInterstate Concrete & Asphalt - Market | Spokane | — | ◇ UNVERIFIED |
| ILIssato LLC | Puyallup | — | ◇ UNVERIFIED |
| JNJulio N. Esteban Mejia | Puyallup | — | ◇ UNVERIFIED |
| KIKoncrete Industries Coneco Portable | Walla Walla | — | ◇ UNVERIFIED |
| KIKyocera Industrial Ceramics CO | Vancouver | — | ◇ UNVERIFIED |
| MGMaterial Good LLC | Seattle | — | ◇ UNVERIFIED |
| MAMaytown Aggregates | Tenino | — | ◇ UNVERIFIED |
| MOMeans Ornamental Concrete Studio II | Olympia | — | ◇ UNVERIFIED |
 Miles Sand & Gravel CO | Puyallup | — | ◇ UNVERIFIED |
| Miles Sand & Gravel CO | Auburn | — | ◇ UNVERIFIED |
| Miles Sand & Gravel Company | Everett | — | ◇ UNVERIFIED |
| Miles Sand & Gravel Company Poulsbo Facility | Poulsbo | — | ◇ UNVERIFIED |
