| IHInterstate Highway Construction | Denver | CO | — | ◐ LIKELY ACTIVE |
| IMIrving Materials INC Indpls Plant 5 | Indianapolis | IN | — | ◐ LIKELY ACTIVE |
| IMIrving Materials INC Kinser Pike Plt | Bloomington | IN | — | ◐ LIKELY ACTIVE |
| ICIvm Chemical INC | Glendale Heights | IL | — | ◐ LIKELY ACTIVE |
| JRJahna Ranch Readymix Facility I | Davenport | FL | — | ◐ LIKELY ACTIVE |
| JAJ and J Concrete | Coldwater | MS | — | ◐ LIKELY ACTIVE |
| JPJensen Precast | Sacramento | CA | — | ◐ LIKELY ACTIVE |
| JJJ J Ferguson, Pretress and Precast Company Greenwood | Greenwood | MS | — | ◐ LIKELY ACTIVE |
| JCJohnson Concrete Company | Concord | NC | — | ◐ LIKELY ACTIVE |
| JCJ&r Constructors Group (asphalt Plant)(portable)(air) | Portable | KS | — | ◐ LIKELY ACTIVE |
| JCJ&s Concrete Number 1 Old | Lancaster | SC | — | ◐ LIKELY ACTIVE |
| JLJuul Labs, INC. | Durham | NC | — | ◐ LIKELY ACTIVE |
| KCKay Concrete Materials-aurora | Aurora | MO | — | ◐ LIKELY ACTIVE |
| KWKc Wilbert Vault | Grandview | MO | — | ◐ LIKELY ACTIVE |
| KCKelly's Concrete & Building Materials INC | Fremont | CA | — | ◐ LIKELY ACTIVE |
| KCKentucky Concrete INC - Shelby CO Concrete INC | Shelbyville | KY | — | ◐ LIKELY ACTIVE |
| KRKern's Ready Mixed Concrete, INC. | Stillwater | OK | — | ◐ LIKELY ACTIVE |
| KRKerr's Redi Mix INC | Centre | AL | — | ◐ LIKELY ACTIVE |
| KIKester INC | Bensenville | IL | — | ◐ LIKELY ACTIVE |
| KCKienstra Concrete (missouri Bottom Rd) | Bridgeton | MO | — | ◐ LIKELY ACTIVE |
| KCKl - Chempak | Greenville | SC | — | ◐ LIKELY ACTIVE |
| KCKl Chempak, INC. | Lester | PA | — | ◐ LIKELY ACTIVE |
| KRKnight's Redi-mix (jedburg Facility) | Summerville | SC | — | ◐ LIKELY ACTIVE |
| KCKuhlman Concrete, LLC | Fort Myers | FL | — | ◐ LIKELY ACTIVE |
| KKKwik Kleen | Pomona | CA | — | ◐ LIKELY ACTIVE |
| LPLafarge Powers Ready Mix | Carbondale | CO | — | ◐ LIKELY ACTIVE |
| LCLandus Cooperative | Ralston | IA | — | ◐ LIKELY ACTIVE |
| LSLan Se, LLC Dba Gate Precast Company | Ashland City | TN | — | ◐ LIKELY ACTIVE |
Leo O'laughlin Inc-leo O'laughlin INC | Shelbina | MO | — | ◐ LIKELY ACTIVE |
| LCLexington Concrete and Block Company, INC. | Mendenhall | MS | — | ◐ LIKELY ACTIVE |
| LCLexington Concrete and Block Company Inc, Lexington Plant | Lexington | MS | — | ◐ LIKELY ACTIVE |
| LCLexington Concrete and Block Company Inc, Pearl Plant | Pearl | MS | — | ◐ LIKELY ACTIVE |
| LRLincoln Ready Mix Concrete | Lincoln | DE | — | ◐ LIKELY ACTIVE |
| LLLiquid Labs LLC | Toms River | NJ | — | ◐ LIKELY ACTIVE |
| LPLongleaf Packaging | Holly Hill | SC | — | ◐ LIKELY ACTIVE |
| LRLoveland Ready Mix | Loveland | CO | — | ◐ LIKELY ACTIVE |
| LSLuck Stone | Burkeville | VA | — | ◐ LIKELY ACTIVE |
| LSLuck Stone - South Richmond Plant | Richmond | VA | — | ◐ LIKELY ACTIVE |
| MCMagnolia Cbp | Magnolia | TX | — | ◐ LIKELY ACTIVE |
| MRMainline Ready Mix | Fort Myers | FL | — | ◐ LIKELY ACTIVE |
| MIManatts INC | Ankeny | IA | — | ◐ LIKELY ACTIVE |
| MCMarshall Concrete | Christiansburg | VA | — | ◐ LIKELY ACTIVE |
| MCMaschmeyer Concrete - Okeechobee Plant | Okeechobee | FL | — | ◐ LIKELY ACTIVE |
| MPMetro Products & Const-robeson | Lumberton | NC | — | ◐ LIKELY ACTIVE |
| MRMetro Ready Mix | Prince George | VA | — | ◐ LIKELY ACTIVE |
| MCMeuth Concrete - Cadiz Plant | Cadiz | KY | — | ◐ LIKELY ACTIVE |
| MCMeuth Construction Supply | Madisonville | KY | — | ◐ LIKELY ACTIVE |
| MMMeyer Material | Mchenry | IL | — | ◐ LIKELY ACTIVE |
| MBMichels Batch Plant - Berthold | Berthold | ND | — | ◐ LIKELY ACTIVE |
| MBMidwest Block & Brick-kansas City Plant | Kansas City | MO | — | ◐ LIKELY ACTIVE |