| HMHargrove Manufacturing | Sand Springs | OK | 20–99 | ◐ LIKELY ACTIVE |
| HMHarleysville Materials/lower Salford | Harleysville | PA | — | ◐ LIKELY ACTIVE |
| HAHarrison, Apac-atlantic, Rhodes Plant-franklin | Franklin | NC | — | ◐ LIKELY ACTIVE |
| HCHarrison Construction Division of Apac- | Dillsboro | NC | — | ◐ LIKELY ACTIVE |
| HCHarrison Construction Division of Apac-atlantic INC. | Burnsville | NC | — | ◐ LIKELY ACTIVE |
| HCHarrison Construction Division of Apac-atlantic INC. | Penrose | NC | — | ◐ LIKELY ACTIVE |
| HCHarrison Construction Division of Apac-atlantic, INC. | Waynesville | NC | — | ◐ LIKELY ACTIVE |
| HCHarrison Construction Divison of Apac-te | Murphy | NC | — | ◐ LIKELY ACTIVE |
| HRHarrison Redi-mix Corporation | Fairfax | VT | 20–99 | ◐ LIKELY ACTIVE |
| HSHarris Sand & Gravel INC | Valdez | AK | — | ◐ LIKELY ACTIVE |
| HCHarrod Concrete & Stone CO INC | Lexington | KY | — | ◐ LIKELY ACTIVE |
| HTHarrod Transport Company Harrod Concrete and Stone Company | Frankfort | KY | — | ◐ LIKELY ACTIVE |
| HWHarry W Kuhn INC | Lemont | IL | — | ◐ LIKELY ACTIVE |
| HCHarsco Corporation | Calvert | AL | — | ◐ LIKELY ACTIVE |
| HMHarsco Metals | Muscatine | IA | — | ◐ LIKELY ACTIVE |
| HMHarsco Minerals | Drakesboro | KY | — | ◐ LIKELY ACTIVE |
| HRHartleys Ready Mix Concrete | Winston Salem | NC | — | ◐ LIKELY ACTIVE |
| HGHartung Glass Industries Pueblo CO. | Pueblo | CO | 20–99 | ◐ LIKELY ACTIVE |
| HGHartung Glass Tukwila WA | Tukwila | WA | 100–499 | ◐ LIKELY ACTIVE |
| HLHaskell Lemon Const/norman Asphalt Plt | Norman | OK | — | ◐ LIKELY ACTIVE |
| HAHastings Asphalt Plant | Hastings | NY | — | ◐ LIKELY ACTIVE |
| HRHatfield Ready Mix, INC. | Batesville | AR | — | ◐ LIKELY ACTIVE |
| HPHawkeye Pedershaab Concrete Technologies, INC | Mediapolis | IA | — | ◐ LIKELY ACTIVE |
| HRHawkeye Ready Mix Hiawatha | Hiawatha | IA | 20–99 | ◐ LIKELY ACTIVE |
| HAHawkins Asphalt Paving Deason Plant | Shelbyville | TN | 1–19 | ◐ LIKELY ACTIVE |
| HAHawkins Asphalt Paving, LLC | Woodbury | TN | — | ◐ LIKELY ACTIVE |
| HAHawkins Asphalt Paving, LLC Dba Hawkins Asphalt Deason | Shelbyville | TN | — | ◐ LIKELY ACTIVE |
| HDH & D INC | Levering | MI | — | ◐ LIKELY ACTIVE |
| HHHeavy Highway Infrastructure-sanford Plant | Sanford | FL | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials Nazareth | Nazareth | PA | 1–19 | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials Ne Braddock Plt | Braddock | PA | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials Ne Llc/rich Hill Quarry | Connellsville | PA | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials Ne Llc/st Thomas | Saint Thomas | PA | — | ◐ LIKELY ACTIVE |
| HNHeidelbergmaterials Ne Llc/wrightsville | Wrightsville | PA | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials Ne Pittsburgh Plt | Pittsburgh | PA | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials Southeast Agg LLC - Leeds Plant | Leeds | AL | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Mtls Northeast Pa /glen Mills Quarry | Glen Mills | PA | — | ◐ LIKELY ACTIVE |
| HWHeidelberg - Watertown Quarry | Pamelia | NY | — | ◐ LIKELY ACTIVE |
| HMHeidleberg Materials Southeast Agg LLC - Rougemont | Rougemont | NC | — | ◐ LIKELY ACTIVE |
| HSHelena Sand & Gravel, INC | Helena | MT | 100–499 | ◐ LIKELY ACTIVE |
| HRHengel Ready Mix and Construction, Inc | Pillager | MN | 20–99 | ◐ LIKELY ACTIVE |
| HHHenry H. Ross and Son, INC. | Lititz | PA | 20–99 | ◐ LIKELY ACTIVE |
| HEHeritage Environmental Svcs LLC | Kansas City | MO | — | ◐ LIKELY ACTIVE |
| HLHermann Lumber Company Ready Mix | Hermann | MO | — | ◐ LIKELY ACTIVE |
| HRHernando Redi Mix | Nesbit | MS | — | ◐ LIKELY ACTIVE |
| HCHerzog Contracting (asphalt Plant) (portable)(air) | Portable | KS | — | ◐ LIKELY ACTIVE |
| HRHess Ready Mix Concrete | Schuylkill Haven | PA | — | ◐ LIKELY ACTIVE |
| HCHgr Cement, LLC | Mesquite | TX | — | ◐ LIKELY ACTIVE |
| HHH & H Paving, LLC | Quitman | GA | — | ◐ LIKELY ACTIVE |
| HMHighway Materials Inc/perkiomenville | Perkiomenville | PA | — | ◐ LIKELY ACTIVE |