| 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 |
| RERivers Edge Ready Mix - Prior Lake | Prior Lake | MN | — | ◇ UNVERIFIED |
| RCRmc Carolina Materials Incorporated | Morrisville | NC | — | ◇ UNVERIFIED |
| RPRmc Pacific Materials Incorporated | San Jose | CA | — | ◇ UNVERIFIED |
| RTRmusa - Troy | Troy | AL | — | ◇ UNVERIFIED |
| RCRoberts Concrete Products | Roberts | WI | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | Beaumont | 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 |
| RRRock & Rail - Highway 34 Facility | Windsor Area | CO | — | ◇ UNVERIFIED |
| RPRockwall Plant | Rockwall | TX | — | ◇ UNVERIFIED |
| RRRonald Reagan Cbp | Georgetown | TX | — | ◇ UNVERIFIED |
| RARusstech Admixtures INC | Louisville | KY | — | ◇ UNVERIFIED |
| RARustin Ardmore Rmc Plant | Ardmore | OK | — | ◇ UNVERIFIED |
| SSacaton | Sacaton | AZ | — | ◇ UNVERIFIED |
| SASan Angelo 1 | San Angelo | TX | — | ◇ UNVERIFIED |
| SASan Angelo 2 | San Angelo | TX | — | ◇ UNVERIFIED |
| SFSan Francisco (a) | San Francisco | CA | — | ◇ UNVERIFIED |
| S1Savannah (plant 11) | Savannah | GA | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix, LLC | Owings Mills | MD | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix Llc-guilford Rd | Jessup | MD | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix Llc-hobbs Rd | Denton | MD | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix Llc-southlawn Ln | Rockville | MD | — | ◇ UNVERIFIED |
| SBSeminole Bp | Seminole | OK | — | ◇ UNVERIFIED |
| SRSemo Ready Mix Inc-cape Girardeau | Jackson | MO | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service, INC. | Knoxville | TN | — | ◇ UNVERIFIED |
| SRService Rock Products INC 4th St | Henderson | NV | — | ◇ UNVERIFIED |
| SRService Rock Products INC. - Beesley Nv | Las Vegas | NV | — | ◇ UNVERIFIED |
| SRService Rock Products INC Lone Mountain Nv Facility | Las Vegas | NV | — | ◇ UNVERIFIED |
| SRService Rock Products INC Sloan | Las Vegas | NV | — | ◇ UNVERIFIED |
| SRService Rock Products - Pahrump Plant | Pahrump | NV | — | ◇ UNVERIFIED |
| SCS&g Concrete Brooklyn Plant | Baltimore | MD | — | ◇ UNVERIFIED |
| SGS & G Concrete Company, Llc- Grantley Ave. Plant | Baltimore | MD | — | ◇ UNVERIFIED |
| SCS&g Concrete Edgewood | Edgewood | MD | — | ◇ UNVERIFIED |
| SCShea Concrete Products INC | Wilmington | MA | — | ◇ UNVERIFIED |
| SCShea Concrete Products - Rochester | Rochester | MA | — | ◇ UNVERIFIED |
 Sherman Industries INC. Bessemer Plant | Bessemer | AL | — | ◇ UNVERIFIED |
| Sherman Industries INC N Central Al Div | Rainbow City | AL | — | ◇ UNVERIFIED |
| Sherman Industries - Leeds Plant | Leeds | AL | — | ◇ UNVERIFIED |
| SPSherman Plant | Sherman | TX | — | ◇ UNVERIFIED |
| STSherman Tarrant Plant | Birmingham | AL | — | ◇ UNVERIFIED |
| SCSika Corporation | Streetsboro | OH | — | ◇ UNVERIFIED |
| SCSiouxland Concrete CO | South Sioux City | NE | — | ◇ UNVERIFIED |
| SPSmokey Point Concrete | Arlington | WA | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix Concrete | South Pittsburg | TN | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix Concrete, LLC | Nashville | TN | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix Concrete, LLC | Saint Cloud | FL | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix Concrete, LLC - Capital Ready Mix | Colorado Springs | CO | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix Concrete LLC - (formerly Metro Ready Mix Concrete, Llc) | Franklin | TN | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix Concrete, LLC - Highway 85 Ready | Colorado Springs | CO | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix, LLC | Murfreesboro | TN | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix, Plant 31 | Knoxville | TN | — | ◇ UNVERIFIED |
| SRSonag Ready Mix | Milwaukee | WI | — | ◇ UNVERIFIED |
| SCSouth Carolina Prestress CORP | Florence | SC | — | ◇ UNVERIFIED |
| SCSouth Central Concrete Bayport Plant | Pasadena | TX | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials-andrews Plant | Andrews | NC | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials - Bryson City | Bryson City | NC | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials-charlotte South Plant | Charlotte | NC | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials Fletcher Plant | Fletcher | NC | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials-hendersonville Plant | Hendersonville | NC | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials-lake Norman Plant | Stanley | NC | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials-salisbury Plant | Salisbury | NC | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials - Sherrills Ford | Sherrills Ford | NC | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials - Sylva Plant | Sylva | NC | — | ◇ UNVERIFIED |
| SESouthern Equipment Dba Ready Mix Concrete - Plant 6 | Apex | NC | — | ◇ UNVERIFIED |
| SESouthern Equipment - Raleigh Concrete Plant 4 | Cary | NC | — | ◇ UNVERIFIED |
| SRSouthern Rm LLC - Goldsboro | Goldsboro | NC | — | ◇ UNVERIFIED |
| SSSouthern Star Concrete - Mesquite Plant | Mesquite | TX | — | ◇ UNVERIFIED |
| SNSouth Norman Batch Plant | Norman | OK | — | ◇ UNVERIFIED |
| SRSouthside Ready Mix | Fort Smith | AR | — | ◇ UNVERIFIED |
| SCSpartan Concrete | Novi | MI | — | ◇ UNVERIFIED |
| SRSpecht Rd Rm | San Antonio | TX | — | ◇ UNVERIFIED |
| SRSpringdale Ready Mix | Springdale | AR | — | ◇ UNVERIFIED |
| SCSpringville Concrete Batch Plant | Springville | UT | — | ◇ UNVERIFIED |
| SISrm Inc-kelly Plant | Edmond | OK | — | ◇ UNVERIFIED |
| SISrm Inc-norman Plant | Norman | OK | — | ◇ UNVERIFIED |
| SPStaker & Parson Companies- Beck Street Consolidated | Salt Lake City | UT | — | ◇ UNVERIFIED |
| SPStaker & Parson Companies Point West Ready-mix Concrete | Lehi | UT | — | ◇ UNVERIFIED |
| SCStandard Concrete Products INC | Santa Monica | CA | — | ◇ UNVERIFIED |
| SMStandard Materials Group, Inc.- Portable Rm 5036 | Bentonville | AR | — | ◇ UNVERIFIED |
| SRStandard Ready Mix Concrete | Sioux City | IA | — | ◇ UNVERIFIED |
| SDSteel Dynamics Columbus, LLC | Columbus | MS | — | ◇ UNVERIFIED |
| SCStephens City | Stephens City | VA | — | ◇ UNVERIFIED |
| S2Stephenville 2 | Stephenville | TX | — | ◇ UNVERIFIED |
| SCSterling Concrete CORP | Sterling | MA | — | ◇ UNVERIFIED |
| SWStern Williams | Carterville | MO | — | ◇ UNVERIFIED |
| SRStillwater Ready Mix INC / Concrete Batch Plant | Stillwater | OK | — | ◇ UNVERIFIED |
| SCStrata Concrete-west Fargo | West Fargo | ND | — | ◇ UNVERIFIED |
| SVSummit View | Fort Collins | CO | — | ◇ UNVERIFIED |
| STSuncoast Tampa Bay Block & R-m CO INC | Tampa | FL | — | ◇ UNVERIFIED |
| SCSunroc Corporation | Hurricane | UT | — | ◇ UNVERIFIED |
| SCSunroc Corporation Badger Concrete Batch Plant | Boise | ID | — | ◇ UNVERIFIED |
