| RDRedi-mix Dallas | Dallas | TX | — | ◇ UNVERIFIED |
| RRRegional Ready Mix LLC | Rochelle | IL | — | ◇ UNVERIFIED |
| RCReis Concrete Products INC | Alexandria | KY | — | ◇ UNVERIFIED |
| RPRex Portable Concrete Plant No. 2701 | Claremore | OK | — | ◇ UNVERIFIED |
| RRReynolds Ready Mix LLC | Loxley | AL | — | ◇ UNVERIFIED |
| RHR H Loven Co, INC. | Boone | NC | — | ◇ UNVERIFIED |
| RCRichmond Concrete Richmond Plant Division of Ernst Enterprises | Richmond | IN | — | ◇ UNVERIFIED |
| RRRich Readimix Concrete INC | Greenbrae | CA | — | ◇ UNVERIFIED |
| RRRidge Rock - East Ellijay Plant | East Ellijay | GA | — | ◇ UNVERIFIED |
| RCRiemers-kaufman Concrete Products | Lincoln | NE | — | ◇ UNVERIFIED |
| RRRiley Ready Mix & Materials Inc-riley Ready Mix & Materials INC | Saint Louis | MO | — | ◇ UNVERIFIED |
| RARinker Albuquerque Pipe | Bernalillo | NM | — | ◇ UNVERIFIED |
| RARinker Alexandria Pipe | Alexandria | LA | — | ◇ UNVERIFIED |
| RCRinker Charlotte Pipe | Concord | NC | — | ◇ UNVERIFIED |
| RCRinker Columbia Pipe | Columbia | SC | — | ◇ UNVERIFIED |
| RERinker El Paso Pipe | Santa Teresa | NM | — | ◇ UNVERIFIED |
| RGRinker Greenfield Pipe | Greenfield | IN | — | ◇ UNVERIFIED |
| RLRinker Las Vegas Pipe | Henderson | NV | — | ◇ UNVERIFIED |
| RMRinker Materials | Littleton | CO | — | ◇ UNVERIFIED |
| RMRinker Materials | West Des Moines | IA | — | ◇ UNVERIFIED |
| RMRinker Materials Hydro Conduit | Grand Island | NE | — | ◇ UNVERIFIED |
| RMRinker Materials Hydro Conduit- Frederick | Frederick | MD | — | ◇ UNVERIFIED |
| RMRinker Materials/lockhart (iw) | Orlando | FL | — | ◇ UNVERIFIED |
| RMRinker Miami Pipe | Miami | FL | — | ◇ UNVERIFIED |
| RMRinker Middletown Pipe | Middletown | DE | — | ◇ UNVERIFIED |
| RMRinker Myrtle Beach Pipe | Aynor | SC | — | ◇ UNVERIFIED |
| RORinker Oklahoma City Pipe | Oklahoma City | OK | — | ◇ UNVERIFIED |
| RORinker Orlando Pipe | Apopka | FL | — | ◇ UNVERIFIED |
| RPRinker Pittsburgh Pipe | Oakdale | PA | — | ◇ UNVERIFIED |
| RRRinker Reno Pipe | Sparks | NV | — | ◇ UNVERIFIED |
| 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 | Bloomington | IL | — | ◇ UNVERIFIED |
| RCRoanoke Concrete Products CO | Lincoln | 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 |
| 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 | Corona | 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 |
| RFRockville Fuel and Feed | Rockville | MD | — | ◇ UNVERIFIED |
| RPRockwall Plant | Rockwall | TX | — | ◇ UNVERIFIED |
| RMRocky Mountain Premix - Wabash Plant | Colorado Springs | CO | — | ◇ UNVERIFIED |
| RMRocky Mountain Redi Mix Plt No3 | Rifle | CO | — | ◇ UNVERIFIED |
| RRRoessler Ready Mix INC | Columbia | IL | — | ◇ UNVERIFIED |
| RFRogers Field Production Facility | Nebo | LA | — | ◇ UNVERIFIED |
| RGRogers Group, INC. - Livingston Quarry - Allons Plant/imi-tn, INC. | Livingston | TN | — | ◇ UNVERIFIED |
| RRRogers Ready Mix | Sparta | IL | — | ◇ UNVERIFIED |
| RRRogers Ready-mix & Materials | Byron | IL | — | ◇ UNVERIFIED |
| RRRogers Ready-mix & Materials INC | Rockford | IL | — | ◇ UNVERIFIED |
| RRRogers Redi-mix | Ruma | IL | — | ◇ UNVERIFIED |
| RLRollcon Llc, Onsite Plant | Clinton | MS | — | ◇ UNVERIFIED |
| RRRonald Reagan Cbp | Georgetown | TX | — | ◇ UNVERIFIED |
| RRRoscoe Ready - Mix INC | Pecatonica | IL | — | ◇ UNVERIFIED |
| RCRosebud Concrete INC | Mission | SD | — | ◇ UNVERIFIED |
| RCRosenfeld Concrete CORP | Hopedale | MA | — | ◇ UNVERIFIED |
| RCRouland Concrete and Supplies | Jacksonville | IL | — | ◇ UNVERIFIED |
| RMRowe Materials - Spotsylvania Plant | Fredericksburg | VA | — | ◇ UNVERIFIED |
| RCRowland Concrete Company | Danville | VA | — | ◇ UNVERIFIED |
| RNRoxboro - Nc Rmc | Roxboro | NC | — | ◇ UNVERIFIED |
| RRRoxbury Ready Mix Incorporated | Charles City | VA | — | ◇ UNVERIFIED |
| RRR R Beasley Incorporated - Kilmarnock | Kilmarnock | VA | — | ◇ UNVERIFIED |
| RRRuach Resources LLC - Portable Wash Plant I | Tioga | ND | — | ◇ UNVERIFIED |
| RBRubble Bee Recycling | Stafford | VA | — | ◇ UNVERIFIED |
| RHRulon Harper Construction, INC. Pit No. 6 | Salt Lake County | UT | — | ◇ UNVERIFIED |
| RRRussell Ready Mix Concrete | Russell | KS | — | ◇ UNVERIFIED |
| RARustin Ardmore Rmc Plant | Ardmore | OK | — | ◇ UNVERIFIED |
| RCRvier City Redemix | Salmon | ID | — | ◇ UNVERIFIED |
| SSacaton | Sacaton | AZ | — | ◇ UNVERIFIED |
| SRSaginaw Rock Products Company | Saginaw | MI | — | ◇ UNVERIFIED |
