| RLRoofblok Limited | Gardner | MA | — | ◇ UNVERIFIED |
| RRRoscoe Ready - Mix INC | Pecatonica | IL | — | ◇ UNVERIFIED |
| RRRoscoe Ready-mix INC | Belvidere | IL | — | ◇ UNVERIFIED |
| RCRosebud Concrete INC | Mission | SD | — | ◇ UNVERIFIED |
| RRRosenbalm Rockery | Fresno | CA | — | ◇ UNVERIFIED |
| RRRosenbalm Rockery | Madera | CA | — | ◇ UNVERIFIED |
| RCRosenfeld Concrete CORP | Hopedale | MA | — | ◇ UNVERIFIED |
| RCRosenfeld Concrete CORP | Framingham | MA | — | ◇ UNVERIFIED |
| RCRoseville-cemey Construction Materials,llc | Roseville | CA | — | ◇ UNVERIFIED |
| RIRoss Island Boise Concrete Plant | Portland | OR | — | ◇ UNVERIFIED |
| RIRoss Island Sand and Gravel Tait Facility | Portland | OR | — | ◇ UNVERIFIED |
| RIRoss Island Sand & Gravel CO | Portland | OR | — | ◇ UNVERIFIED |
| RRRost Ready Mix | Springfield | MO | — | ◇ UNVERIFIED |
| RRRost Ready Mix | Springfield | MO | — | ◇ UNVERIFIED |
| RRRoswell Ready Mix Concrete | Roswell | NM | — | ◇ UNVERIFIED |
| RCRouland Concrete and Supplies | Jacksonville | IL | — | ◇ UNVERIFIED |
| RRRound Rock Batch Plant | — | TX | — | ◇ UNVERIFIED |
| RCRowe Construction CO | Normal | IL | — | ◇ UNVERIFIED |
| RCRowe Construction CO - Plant 150 | Bloomington | IL | — | ◇ UNVERIFIED |
| RCRowe Construction Co-plant 170 | Bloomington | IL | — | ◇ UNVERIFIED |
| RMRowe Materials - Spotsylvania Plant | Fredericksburg | VA | — | ◇ UNVERIFIED |
| RRRowley Ready Mix, Inc. | Gloucester | MA | — | ◇ UNVERIFIED |
| RNRoxboro - Nc Rmc | Roxboro | NC | — | ◇ UNVERIFIED |
| RWRoyal White Cement | Houston | TX | — | ◇ UNVERIFIED |
| RRR R Beasley Incorporated - Kilmarnock | Kilmarnock | VA | — | ◇ UNVERIFIED |
| RSR & S Concrete | Fresno | TX | — | ◇ UNVERIFIED |
| RRR&t Redi Mix - 7355 Colorado 196 | Lamar 3.3 Mi. N of | CO | — | ◇ UNVERIFIED |
| RRRuach Resources LLC - Portable Wash Plant I | Tioga | ND | — | ◇ UNVERIFIED |
| RRRuach Resources LLC - Williston Ready Mix Plant | Williston | ND | — | ◇ UNVERIFIED |
| RBRubble Bee Recycling | Stafford | VA | — | ◇ UNVERIFIED |
| RCRuby Concrete Company INC | Madisonville | KY | — | ◇ UNVERIFIED |
| RCRuiz Concrete & Paving INC Dba Ruiz Engineering INC | Long Beach | CA | — | ◇ UNVERIFIED |
| RHRulon Harper Construction, INC. Pit No. 6 | Salt Lake County | UT | — | ◇ UNVERIFIED |
| RHRulon Harper Construction Pit #12 | Tooele | UT | — | ◇ UNVERIFIED |
| RRRussell Ready Mix Concrete, INC. | Russell | KS | — | ◇ UNVERIFIED |
| RCRvier City Redemix | Salmon | ID | — | ◇ UNVERIFIED |
| RBRw Busse Excavating | Grand Lake | CO | — | ◇ UNVERIFIED |
| SPSabine Pass Cbp | Port Arthur | TX | — | ◇ UNVERIFIED |
| SPSabine Pass Lng LP - Sabine Pass Lng Import Terminal | Johnsons Bayou | LA | — | ◇ UNVERIFIED |
| SPSabine Pass Washout Facility | Port Arthur | TX | — | ◇ UNVERIFIED |
| SPSacramento Prestige Gunite | Rocklin | CA | — | ◇ UNVERIFIED |
| SHSaint Henry Tile CO INC Dba Berne Ready Mix | Berne | IN | — | ◇ UNVERIFIED |
| SMSaldanas Masonry | Brownsville | TX | — | ◇ UNVERIFIED |
| SPSalem Plant | Salem | MO | — | ◇ UNVERIFIED |
| SRSalem Ready Mix, LLC | Salem | SD | — | ◇ UNVERIFIED |
| SCSalina Concrete Products | Salina | KS | — | ◇ UNVERIFIED |
| SCSalinas Concrete | Deming | NM | — | ◇ UNVERIFIED |
| SSalisbury | Salisbury | MD | — | ◇ UNVERIFIED |
| SMSamoa Maritime | Pago Pago | AS | — | ◇ UNVERIFIED |
| SWSamsula Waste INC | New Smyrna Beach | FL | — | ◇ UNVERIFIED |
| SBSan Benito Supply | Paso Robles | CA | — | ◇ UNVERIFIED |
| SBSan Benito Supply - Watsonville | Watsonville | CA | — | ◇ UNVERIFIED |
| SISandco INC | Durango | CO | — | ◇ UNVERIFIED |
| SCSand Creek Concrete LLC | Hoxie | KS | — | ◇ UNVERIFIED |
| SISandman INC Dba Star Concrete | Hollister | CA | — | ◇ UNVERIFIED |
| SISandman, INC. Dba Star Concrete | San Jose | CA | — | ◇ UNVERIFIED |
| SISandman INC Doing Business As Star Concrete | Morgan Hill | CA | — | ◇ UNVERIFIED |
| SASanford Airport Temporary Batch Plant | Sanford | FL | — | ◇ UNVERIFIED |
| SDSangre De Cristo Gravel Product | Las Vegas | NM | — | ◇ UNVERIFIED |
| SUSanjel Usa, INC. | Rifle Area | CO | — | ◇ UNVERIFIED |
| SJSan Juan Redimix LLC | Pagosa Springs | CO | — | ◇ UNVERIFIED |
| SJSan Juan Redimix - Pagosa Rmc | Pagosa Springs 2.1 Mi. Nw of | CO | — | ◇ UNVERIFIED |
| SFSanta Fe Aggregates INC | Sanger | CA | — | ◇ UNVERIFIED |
| SFSanta Fe Fee H Tb Swdw #12 Facility | Marksville | LA | — | ◇ UNVERIFIED |
| SMSanta Maria Concrete Plant | Santa Barbara | CA | — | ◇ UNVERIFIED |
| SRSantee Redi Mix | Moncks Corner | SC | — | ◇ UNVERIFIED |
| SLSantiago Lopez Concrete INC. | Lajas | PR | — | ◇ UNVERIFIED |
| SXSan Xavier Rock & Materials - Cortaro Plant #23 | Tucson | AZ | — | ◇ UNVERIFIED |
| STSarasota Transport LLC | Westerville | OH | — | ◇ UNVERIFIED |
| SPSaratoga Plant | Corpus Christi | TX | — | ◇ UNVERIFIED |
| SCSather Construction, LLC | Boise | ID | — | ◇ UNVERIFIED |
| SCSaunders Companies, INC. | Cortland | NY | — | ◇ UNVERIFIED |
| SRSavannah Ready Mix, LLC | Savannah | GA | — | ◇ UNVERIFIED |
| SCS.b. Cox Ready Mix | Newport News | VA | — | ◇ UNVERIFIED |
| SBS B Cox Ready Mix - Gloucester Plant | Gloucester | VA | — | ◇ UNVERIFIED |
| SBS B Cox Ready Mix INC - Chesapeake Plant | Chesapeake | VA | — | ◇ UNVERIFIED |
| SBS B Cox Ready Mix INC Doswell Plant | Doswell | VA | — | ◇ UNVERIFIED |
| SBS B Cox Ready Mix INC - Goochland Plant | Rockville | VA | — | ◇ UNVERIFIED |
| SBS B Cox Ready Mix-nottoway Plant | Blackstone | VA | — | ◇ UNVERIFIED |
| SRSchaaf Redi Mix | Atkinson | NE | — | ◇ UNVERIFIED |
| SCSchirz Concrete Products INC | Greenfield | IL | — | ◇ UNVERIFIED |
| STSchlumberger Technology Corporation | Grand Junction | CO | — | ◇ UNVERIFIED |
| SCSchreiter Concrete | Wright City | MO | — | ◇ UNVERIFIED |
| SRSchreiter Ready Mix | O Fallon | MO | — | ◇ UNVERIFIED |
| SSSchrey Systems INC | Newton | IL | — | ◇ UNVERIFIED |
| SCSchuster Concrete - Mid Pike | Rockville | MD | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix - Cp18 | Alexandria | VA | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix - Kalahari | Woodford | VA | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix - One Logistics | Winchester | VA | — | ◇ UNVERIFIED |
| SCSchuur Concrete LLC | Chandler | MN | — | ◇ UNVERIFIED |
 Schwartz Redi-mix INC | La Prairie | MN | — | ◇ UNVERIFIED |
| SRScioto Ready Mix | Dublin | OH | — | ◇ UNVERIFIED |
| SCScott City Ready Mix Plant | Scott City | KS | — | ◇ UNVERIFIED |
| SPScottsboro Plant | Scottsboro | AL | — | ◇ UNVERIFIED |
| SPSc Prestress Kingstree | Kingstree | SC | — | ◇ UNVERIFIED |
| SCScrap Central INC | Omaha | NE | — | ◇ UNVERIFIED |
| SCScruggs Concrete Company | Madison | FL | — | ◇ UNVERIFIED |
| SIScurlock Industries of Springfield-springfiled | Springfield | MO | — | ◇ UNVERIFIED |
| SCSd Concrete Pumping INC | Santee | CA | — | ◇ UNVERIFIED |
| SCSeaford Concrete Products | Bridgeville | DE | — | ◇ UNVERIFIED |
