| RSRinker Stockbridge Pipe | Stockbridge | GA | — | ◇ UNVERIFIED |
| RWRinker Whitestown Pipe | Whitestown | IN | — | ◇ UNVERIFIED |
| RWRinker Wilson Pipe | Wilson | NC | — | ◇ UNVERIFIED |
| RCRio's Concrete Pumping & Rental INC | Medley | FL | — | ◇ UNVERIFIED |
| RCRiver City Concrete, INC. | Selmer | TN | — | ◇ UNVERIFIED |
| RFRiver Front Recycling & Aggregate | Camden | NJ | — | ◇ UNVERIFIED |
| RFRiver Front Recycling & Aggregate CORP | Waterford Twp | NJ | — | ◇ UNVERIFIED |
| RRRiver Redi-mix INC | Minonk | IL | — | ◇ UNVERIFIED |
| RERivers Edge Ready Mix - Prior Lake | Prior Lake | MN | — | ◇ UNVERIFIED |
| RRRiverside Ready Mix, INC. | Grants Pass | OR | — | ◇ UNVERIFIED |
| RGRiverstone Group INC | Rock Island | IL | — | ◇ UNVERIFIED |
| RPR.j. Paquette Concrete | Holden | MA | — | ◇ UNVERIFIED |
| RIRlh Investments LLC | Chalmette | LA | — | ◇ UNVERIFIED |
| RERmc Ewell -holiday | Pasco | FL | — | ◇ UNVERIFIED |
| RPRmc Pacific Materials Incorporated | San Jose | CA | — | ◇ UNVERIFIED |
| R1Rmq 1 and 2 | Rocky Mount | NC | — | ◇ UNVERIFIED |
| RTRmusa - Troy | Troy | AL | — | ◇ UNVERIFIED |
| RCRoanoke Chowan Ready Mix | Ahoskie | NC | — | ◇ UNVERIFIED |
| RCRoanoke Concrete Products CO | Petersburg | IL | — | ◇ UNVERIFIED |
| RCRoanoke Concrete Products CO | Lincoln | IL | — | ◇ UNVERIFIED |
| RCRoanoke Concrete Products CO | Bloomington | IL | — | ◇ UNVERIFIED |
| RFRoaring Fork Redi Mix INC | Lakewood | CO | — | ◇ UNVERIFIED |
| RMRobert Medina and Sons - Concrete Batch | Taos | NM | — | ◇ UNVERIFIED |
| RARoberts Auto Salvage | Labelle | FL | — | ◇ UNVERIFIED |
| RCRoberts Concrete Products | Roberts | WI | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | Corona | CA | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | Corona | CA | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | Beaumont | CA | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | French Camp | CA | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix Lake Forest Plant 18 | Foothill Ranch | CA | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix San Bernardino Plant 12 | San Bernardino | CA | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix Santa Ana Plant 17 | Santa Ana | CA | — | ◇ UNVERIFIED |
| RRRobertsons Rialto Batch and Rock Plant | Rialto | CA | — | ◇ UNVERIFIED |
| RCRobins Construction - 5101 State Hwy 285 | Antonito Area | CO | — | ◇ UNVERIFIED |
| RSRockbridge Stone Products | Glasgow | VA | — | ◇ UNVERIFIED |
| RRRockcastle Ready Mix | Mount Vernon | KY | — | ◇ UNVERIFIED |
| RCRockford Cement Products CO | Rockford | IL | — | ◇ UNVERIFIED |
| RRRockingham Redi-mix - Clearbrook Facility | Stephenson | VA | — | ◇ UNVERIFIED |
| RRRockingham Redi-mix INC - Mt Sidney | Mount Sidney | VA | — | ◇ UNVERIFIED |
| RRRockingham Redi-mix INC - Strasburg | Strasburg | VA | — | ◇ UNVERIFIED |
| RRRockingham Redi-mix - Mt Jackson Facility | Mount Jackson | VA | — | ◇ UNVERIFIED |
| RCRock-tred CORP | Skokie | IL | — | ◇ UNVERIFIED |
| RFRockville Fuel and Feed | Rockville | MD | — | ◇ UNVERIFIED |
| RPRockwall Plant | Rockwall | TX | — | ◇ UNVERIFIED |
| RMRocky Mountain Premix - Wabash Plant | Colorado Springs | CO | — | ◇ UNVERIFIED |
| RMRocky Mountain Prestress LLC (structural Plant) | Denver | CO | — | ◇ UNVERIFIED |
| RMRocky Mountain Redi Mix Plt No3 | Rifle | CO | — | ◇ UNVERIFIED |
| RCRocla Concrete Tie Incorporated | Denver | CO | — | ◇ UNVERIFIED |
| RRRoessler Ready Mix INC | Columbia | IL | — | ◇ UNVERIFIED |
| RFRogers Field Production Facility | Nebo | LA | — | ◇ UNVERIFIED |