| 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 |
| 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 |
 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 |
| SCSeaford Concrete Products | Bridgeville | DE | — | ◇ UNVERIFIED |
| SCSealy Concrete | Sealy | TX | — | ◇ UNVERIFIED |
| SCSebewaing Concrete Prod INC | Sebewaing | MI | — | ◇ UNVERIFIED |
| SASebring Airport Temporary Ready Mix Plant | Orlando | FL | — | ◇ UNVERIFIED |
| SCSe Concrete INC | Kingston | MA | — | ◇ UNVERIFIED |
| S0See 041-0231-03 Pete Lien & Sons | Colorado Springs | CO | — | ◇ UNVERIFIED |
| S0See 075/0089 Mcatee Construction Co- Riv | Sterling | CO | — | ◇ UNVERIFIED |
| SCSei Concrete - Clay CO Facility | Manchester | KY | — | ◇ UNVERIFIED |
| SOSemo Operating Company | Bragg City | MO | — | ◇ UNVERIFIED |
| SOSemo Operating Company | Cape Girardeau | MO | — | ◇ UNVERIFIED |
| SOSemo Operating Company | Advance | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix | Sikeston | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Advance | Advance | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Cape Girardeau North | Cape Girardeau | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Cape Girardeau South | Cape Girardeau | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Dexter | Dexter | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix, INC. | Cape Girardeau | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Kennett | Kennett | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Marston Site | Marston | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Poplar Bluff North | Poplar Bluff | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Poplar Bluff South | Poplar Bluff | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Sikeston East | Sikeston | MO | — | ◇ UNVERIFIED |
| SRSemo Ready Mix - Sikeston West | Sikeston | MO | — | ◇ UNVERIFIED |
| SBSeppi Brothers | Wuori Township | MN | — | ◇ UNVERIFIED |
| SBSeppi Brothers Concrete Products Corporation | Virginia | MN | — | ◇ UNVERIFIED |
| SBSeptember Bloom, INC | Mcminnville | TN | — | ◇ UNVERIFIED |
| SBSeptember Bloom Ready Mix Concrete Plant | Mcminnville | TN | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service | Chattanooga | TN | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service - Athens | Athens | TN | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service Inc, Helen of Troy Site | Olive Branch | MS | — | ◇ UNVERIFIED |
| SRSe Ready Mix - Okeechobee Commerce Park | Okeechobee | FL | — | ◇ UNVERIFIED |
| SPServall Plant/erie | Erie | PA | — | ◇ UNVERIFIED |
| SLService Lumber Company | Rolling Fork | MS | — | ◇ UNVERIFIED |
| SRService Rock Prods INC Las Vegas | Las Vegas | NV | — | ◇ UNVERIFIED |
| SRService Rock Products | Barstow | CA | — | ◇ UNVERIFIED |
| SRService Rock Products Corporation | Henderson | NV | — | ◇ UNVERIFIED |
| SRService Rock Products Corporation | Las Vegas | NV | — | ◇ UNVERIFIED |
