| 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 |
| SPSaint-gobain Proppants (lr) | Benton | AR | — | ◇ UNVERIFIED |
| SHSaint Henry Tile CO INC Dba Berne Ready Mix | Berne | IN | — | ◇ 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 |
| 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 |