| KRKnights Redi-mix Concrete Plant 2 | Walterboro | — | ◇ UNVERIFIED |
| KRKnight's Redi Mix Jedburg Plant 4 | Summerville | — | ◇ UNVERIFIED |
| KRKnights Redi-mix Midlands LLC Plant 6 Blythewood | Blythewood | — | ◇ UNVERIFIED |
| KMKrm Midlands LLC Irmo Plant 7 | Irmo | — | ◇ UNVERIFIED |
| KMKrm Midlands LLC Lexington Plant 9 | Lexington | — | ◇ UNVERIFIED |
| KMKrm Midlands LLC - Lugoff Plant 8 | Lugoff | — | ◇ UNVERIFIED |
| KMKrm Midlands LLC Pineview Plant 3 | North Charleston | — | ◇ UNVERIFIED |
| KMKrm Midlands, Llc-plant 8 | Lugoff | — | ◇ UNVERIFIED |
| KSKrm South LLC - Hardeeville Plant 16 | Hardeeville | — | ◇ UNVERIFIED |
| KSKrm South - Plant 15 | Ridgeland | — | ◇ UNVERIFIED |
| LBLafarge Building Materials Aiken Redi Mix | Aiken | — | ◇ UNVERIFIED |
| LCLanier Construction:lexington Concrete | Lexington | — | ◇ UNVERIFIED |
| MTMark Twain Redi-mix | Williamston | — | ◇ UNVERIFIED |
| MIMesser Industries - Closed | Greer | — | ◇ UNVERIFIED |
| MIMetrocon INC | Travelers Rest | — | ◇ UNVERIFIED |
| MIMetrocon Inman Plant | Inman | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation Belton | Anderson | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation Richburg | Richburg | — | ◇ UNVERIFIED |
| MMetromont:whitehorse | Greenville | — | ◇ UNVERIFIED |
| MCMorgan Concrete CO Pickens | Sunset | — | ◇ UNVERIFIED |
| PCPiedmont Concrete:spartanburg | Spartanburg | — | ◇ UNVERIFIED |
| P8Plant 84 - Florence | Florence | — | ◇ UNVERIFIED |
| PIPpg Industries Fiber Glass Products INC | Chester | — | ◇ UNVERIFIED |
| RCRc Construction CO INC | Charleston | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete #84 Florence-closed | Florence | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete #85 Marion | Marion | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO | Columbia | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO Portable Plt | Georgetown | — | ◇ UNVERIFIED |
| RRReflective Recycling of Sc LLC | Pacolet | — | ◇ UNVERIFIED |
| RCRichtex Corporation Ninety Six Plant 9 | Ninety Six | — | ◇ UNVERIFIED |
| SSScotts Sierra:travelers Rest-closed | Travelers Rest | — | ◇ UNVERIFIED |
| SPSite Prep INC of Nc | Orangeburg | — | ◇ UNVERIFIED |
| SPSite Prep INC of Nc | Gaston | — | ◇ UNVERIFIED |
| SASrm Aiken Plant | Aiken | — | ◇ UNVERIFIED |
| SBSrm - Bluffton #344 | Bluffton | — | ◇ UNVERIFIED |
| SGSrm Georgetown Plant | Georgetown | — | ◇ UNVERIFIED |
| SGSrm Georgetown Plant | Georgetown | — | ◇ UNVERIFIED |
| SMSrm Myrtle Beach Plant | Myrtle Beach | — | ◇ UNVERIFIED |
| SRSrm Ridgeland Plant | Ridgeland | — | ◇ UNVERIFIED |
| SLStevenson-weir Lockhart | Union | — | ◇ UNVERIFIED |
| SSStevenson-weir/ Southern, LLC - Greenville Plant | Greenville | — | ◇ UNVERIFIED |
| SRS&w Ready Mix Concrete Company LLC | Clinton | — | ◇ UNVERIFIED |
| TCThomas Concrete Charleston King St. | Charleston | — | ◇ UNVERIFIED |
| TCThomas Concrete Chester | Chester | — | ◇ UNVERIFIED |
| TCThomas Concrete Conway West | Conway | — | ◇ UNVERIFIED |
| TCThomas Concrete Gaston | Gaston | — | ◇ UNVERIFIED |
| TCThomas Concrete - Little River | Little River | — | ◇ UNVERIFIED |
| TCThomas Concrete of Carolina INC South Plant | Fort Mill | — | ◇ UNVERIFIED |
| TCThomas Concrete of South Carolina INC - Fountain Inn | Fountain Inn | — | ◇ UNVERIFIED |
| TCThomas Concrete of South Carolina INC – Greenville Plant | Greenville | — | ◇ UNVERIFIED |
