| TRTroesh Ready Mix Sand/gravel | Nipomo | CA | — | ◇ UNVERIFIED |
| TSTroutdale Sand and Gravel Company | Troutdale | OR | — | ◇ UNVERIFIED |
| TDTroy Davis and Company, LLC | Clever | MO | — | ◇ UNVERIFIED |
| TRTroy Ready Mix Incorporated | Troy | NC | — | ◇ UNVERIFIED |
| TVTroy Vines Barstow Plant | Barstow | TX | — | ◇ UNVERIFIED |
| TVTroy Vines Garden City Plant | Garden City | TX | — | ◇ UNVERIFIED |
| TVTroy Vines Monahans Plant | Monahans | TX | — | ◇ UNVERIFIED |
| TVTroy Vines Odessa Concrete Plant | Odessa | TX | — | ◇ UNVERIFIED |
| TNTruckee North Tahoe Materials | Truckee | CA | — | ◇ UNVERIFIED |
| TETrue Enterprise LLC | Miramar | FL | — | ◇ UNVERIFIED |
| TCTube City Ims, LLC | Middletown | OH | — | ◇ UNVERIFIED |
| TRTucker Readymix INC | Somerset | KY | — | ◇ UNVERIFIED |
| TRTulare Ready Mix Calportland Company | Tulare | CA | — | ◇ UNVERIFIED |
| TITungco INC | Hanson | KY | — | ◇ UNVERIFIED |
| TRTurlock Ready Mix Calportland Company | Turlock | CA | — | ◇ UNVERIFIED |
| TRTuskegee Ready Mix | Montgomery | AL | — | ◇ UNVERIFIED |
| TRTuskegee Ready Mix, INC. | Tuskegee | AL | — | ◇ UNVERIFIED |
| TCTutor-saliba Corporation | Lakehead | CA | — | ◇ UNVERIFIED |
| TCTwin Cities Ready Mix, Inc.-eufaula Facility | Eufaula | OK | — | ◇ UNVERIFIED |
| TFTwin Falls Redi-mix | Twin Falls | ID | — | ◇ UNVERIFIED |
| TKTwin K Enterprises, LLC Dba Harriman Batch Plant | Harriman | TN | — | ◇ UNVERIFIED |
| TATwisselman Aggregate Mine | California Valley | CA | — | ◇ UNVERIFIED |
| TTTwo Thousand Fahrenheit INC | Becker | MN | — | ◇ UNVERIFIED |
| TBTxi Bastrop Ready Mix | Bastrop | LA | — | ◇ UNVERIFIED |
| TDTxi - Domino Portable 156 | Waxahachie | TX | — | ◇ UNVERIFIED |
| TETxi East Texas Ready Mix | Longview | TX | — | ◇ UNVERIFIED |
| TFTxi Forney Portable 137 | Forney | TX | — | ◇ UNVERIFIED |
| TGTxi - Grapevine Portable | Grapevine | TX | — | ◇ UNVERIFIED |
| TKTxi Killeen Ready Mix | Killeen | TX | — | ◇ UNVERIFIED |
| TLTxi Lewisville Ready Mix | Lewisville | TX | — | ◇ UNVERIFIED |
| TOTxi Operations | Streetman | TX | — | ◇ UNVERIFIED |
| TOTxi Operations Lp-south Ready Mix Plant | Beaumont | TX | — | ◇ UNVERIFIED |
| TOTxi Operations LP - Txi Portable Ready Mix #134 | Portable Source | LA | — | ◇ UNVERIFIED |
| TOTxi Operations Sprangler Road Ctm | Dallas | TX | — | ◇ UNVERIFIED |
| TPTxi - Portable 134 North Qr 35 Project | Fort Worth | TX | — | ◇ UNVERIFIED |
| TTxi-portable134 (terrell) | Terrell | TX | — | ◇ UNVERIFIED |
| TPTxi - Portable 154 Ready Mix | Longview | TX | — | ◇ UNVERIFIED |
| TPTxi - Portable 904 - Pike Project Lancaster | Lancaster | TX | — | ◇ UNVERIFIED |
| TPTxi - Portable 916 - Dallas Pdc Project | Lancaster | TX | — | ◇ UNVERIFIED |
| TPTxi Port Arthur Ready Mix | Port Arthur | TX | — | ◇ UNVERIFIED |
| TRTxi Riverside INC | Riverside | CA | — | ◇ UNVERIFIED |
| TRTxi-silsbee Ready Mix | Silsbee | TX | — | ◇ UNVERIFIED |
| TSTxi South Texas Ready Mix | Tomball | TX | — | ◇ UNVERIFIED |
| TSTxi - Spicewood Ready Mix | Marble Falls | TX | — | ◇ UNVERIFIED |
| TRTxi-winnsboro Ready Mix | Winnsboro | TX | — | ◇ UNVERIFIED |
| TBTxm - Bastrop Ready Mix | Bastrop | TX | — | ◇ UNVERIFIED |
| TGTxm - Green Ready Mix | Austin | TX | — | ◇ UNVERIFIED |
| TJTxm - Jarrell Ready Mix | Jarrell | TX | — | ◇ UNVERIFIED |
| TKTxm - Kirby Ready Mix | San Antonio | TX | — | ◇ UNVERIFIED |
| TLTxm - Lago Vista Ready Mix | Lago Vista | TX | — | ◇ UNVERIFIED |
| TLTxm - Leander Ready Mix | Leander | TX | — | ◇ UNVERIFIED |
| TSTxm - San Marcos Ready Mix | San Marcos | TX | — | ◇ UNVERIFIED |
| TTTxm - Taylor Ready Mix | Taylor | TX | — | ◇ UNVERIFIED |
| TTTxm - Tesla Rd Ready Mix | Austin | TX | — | ◇ UNVERIFIED |
| TWTxm - Westside Ready Mix | San Antonio | TX | — | ◇ UNVERIFIED |
| URUmatilla Ready Mix | Pendleton | OR | — | ◇ UNVERIFIED |
| URUmatilla Ready Mix Hermiston Plant | Hermiston | OR | — | ◇ UNVERIFIED |
| UCUnicon Concrete Incorporated | High Point | NC | — | ◇ UNVERIFIED |
| UCUnicon Concrete Incorporated Plant Number 6 | Durham | NC | — | ◇ UNVERIFIED |
| UCUnimin Corporation | Gleason | TN | — | ◇ UNVERIFIED |
| UCUniontown Concrete Plt | Hopwood | PA | — | ◇ UNVERIFIED |
| UCUnited Concrete CORP | Waukegan | IL | — | ◇ UNVERIFIED |
| UCUnited Contractors Midwest | Chapin | IL | — | ◇ UNVERIFIED |
| UMUnited Materials Company-st Louis | Saint Louis | MO | — | ◇ UNVERIFIED |
| UMUnited Metro Materials | Phoenix | AZ | — | ◇ UNVERIFIED |
| UMUnited Metro Materials (dba Rinker Materials) El Mirage 106 | El Mirage | AZ | — | ◇ UNVERIFIED |
| URUnited Ready Mix INC | Pekin | IL | — | ◇ UNVERIFIED |
| URUnited Ready Mix INC | Peoria | IL | — | ◇ UNVERIFIED |
 United States Gypsum Company | Spruce Pine | NC | — | ◇ UNVERIFIED |
 Universal Minerals International INC. | Louisville | KY | — | ◇ UNVERIFIED |
| URUpchurch Ready Mix Concrete CO | East Saint Louis | IL | — | ◇ UNVERIFIED |
| URUpchurch Ready Mix Concrete CO INC | Belleville | IL | — | ◇ UNVERIFIED |
| UCUpper Cape Ready Mix | East Falmouth | MA | — | ◇ UNVERIFIED |
| UUrbix | Mesa | AZ | — | ◇ UNVERIFIED |
| UIU-rent INC. | Camarillo | CA | — | ◇ UNVERIFIED |
| UIU-rent INC. | Saticoy | CA | — | ◇ UNVERIFIED |
| UNUs301 Nice-middleton Bridge Replacement Project | Newburg | MD | — | ◇ UNVERIFIED |
| UEUs69 Express 135th Loop Ramp | Overland Park | KS | — | ◇ UNVERIFIED |
| UEUs69 Express Bvpw Batch Plant | Overland Park | KS | — | ◇ UNVERIFIED |
| UNUsace New River Chamber Batch Concrete Plt | Monaca | PA | — | ◇ UNVERIFIED |
| UCUSA Concrete LLC | La Grande | OR | — | ◇ UNVERIFIED |
| UFUsc - Ferrara Brothers LLC - Chelsea Road | Staten Island | NY | — | ◇ UNVERIFIED |
| UKUsc - Kings LLC - Inwood | Inwood | NY | — | ◇ UNVERIFIED |
| UKUsc - Kings LLC - on Time | Flushing | NY | — | ◇ UNVERIFIED |
| UCU.s. Concrete Company/superior Concrete Materials | Washington | DC | — | ◇ UNVERIFIED |
| UCU.s. Concrete, INC. | Staten Island | NY | — | ◇ UNVERIFIED |
| UCU.s. Concrete, INC. | Staten Island | NY | — | ◇ UNVERIFIED |
| UCUS Concrete On-site INC | Camp Grove | IL | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | San Juan | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - Ft. Lauderdale Ao | Miami | FL | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Houston South Area Office | Galveston | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - Tampa Ao | Orlando | FL | — | ◇ UNVERIFIED |
| USU.s. Silica Company, | Middleton | TN | — | ◇ UNVERIFIED |
| USUS Silica Kosse Plant | Kosse | TX | — | ◇ UNVERIFIED |
| USUS Steel Corporation | Lorain | OH | — | ◇ UNVERIFIED |
| UCUstone Cement Products & Solution LLC | Medley | FL | — | ◇ UNVERIFIED |
| UTUtica Transit Mix and Supply | Sterling Heights | MI | — | ◇ UNVERIFIED |
| VDValco Div-3 | Lamar | CO | — | ◇ UNVERIFIED |
| VIValco INC | Canon City | CO | — | ◇ UNVERIFIED |
| VIValco INC | Rocky Ford 2.0 Mi. E of | CO | — | ◇ UNVERIFIED |
