| Dr. Pipeline LLC | Nampa | ID | $0 |
| DSM Properties, LLC | Baltimore | MD | $0 |
| DSW Services LLC | Harrisburg | PA | Subcontractor |
| Durham Pump, Inc. | Durham | CA | $0 |
| Earth Tech Drilling, Inc. | Pompano Beach | FL | Subcontractor |
| Earthworks Excavation And Associates LLC | Higginsville | MO | $0 |
| East Central Vernon Water System, Inc. | Leesville | LA | $0 |
| East Coast Infrastructure Inc. | Yorktown | VA | Subcontractor |
| Eastern Water Solutions, Inc. | Oxford | CT | $0 |
| Ed Boland Construction, Inc. | Great Falls | MT | Subcontractor |
| Ella S.a. Contracting, L.P | San Antonio | TX | Subcontractor |
| Ellingson Drainage Inc. | West Concord | MN | Subcontractor |
| Elliott Construction LLC | Bryan | TX | $0 |
| El Paso Trench Safety, Inc. | El Paso | TX | Subcontractor |
| Empire Excavation & Development Corp. | Kamas | UT | $0 |
| Empire Pipe Cleaning And Equipment, Inc. | Orange | CA | $0 |
| Enertex | Marseille | | Subcontractor |
| Entech Corp. | Closter | NJ | $0 |
| Environmental Drilling & Geothermal Exploration Solutions Inc. | Ravenel | SC | Subcontractor |
| Environmental Drilling Service, Inc. | Orlando | FL | Subcontractor |
| Enviroscape Inc. | Sandston | VA | Subcontractor |
| Euro-ecologic SRL | Vlahita | | Subcontractor |
| Ewing Co. Inc. | Meridian | ID | $0 |
| Excel Pump And Well Inc. | Helena | MT | Subcontractor |
| Falwell Corporation | Lynchburg | VA | $0 |
| Fayetteville Contractors Inc. | Fayetteville | PA | Subcontractor |
| Ferguson Contracting, Inc. | Pinehurst | ID | $0 |
| Field Lining Systems Inc. | Avondale | AZ | $0 |
| Fields Excavating Inc. | Kitts Hill | OH | $0 |
| Finley Asphalt & Sealing, LLC | Bristow | VA | Subcontractor |
| First Quality Building & Design, Inc. | Waimanalo | HI | Subcontractor |
| Fit Excavating Inc. | Topeka | KS | Subcontractor |
| Five Bs Construction & Utilities Inc. | Spring Branch | TX | $0 |
| Flippo Construction Company, Inc. | Forestville | MD | Subcontractor |
| Florida Aquastore And Utility Construction, Inc. | Boca Raton | FL | Subcontractor |
| Florida Design Drilling LLC | West Palm BCH | FL | $0 |
| Forrest Sewer Pump Service, Inc. | Virginia Beach | VA | $0 |
| Fury Site Works Inc. | North Bend | WA | $0 |
| Gabe's Construction Co. Inc. | Sheboygan | WI | Subcontractor |
| Gaines & Co. Inc. | Reisterstown | MD | Subcontractor |
| Gaines Construction, LLC | Knightdale | NC | Subcontractor |
| Gammon Well Co. Inc. | Provdence FRG | VA | $0 |
| Garney Federal, Inc. | Kansas City | MO | Subcontractor |
| General Excavating, LLC | Lincoln | NE | Subcontractor |
| General Industries, Inc. | Spokane Valley | WA | $0 |
| General Paving And Contracting, Inc. | Halethorpe | MD | $0 |
| Gene Summers Construction, Inc. | North Little Rock | AR | $0 |
| Geocentric Drilling Inc. | West Sacramento | CA | Subcontractor |
| Gerber Construction, Inc. | Lehi | UT | $0 |
| Gilbert Engineering Company | Statesville | NC | $0 |
| Glacier Construction Co. Inc. | Centennial | CO | Subcontractor |
| GMC Contracting, Inc. | Anchorage | AK | Subcontractor |
| G & M Earth Moving Inc. | Holbrook | NY | Subcontractor |
| Goins Enterprises Inc. | Joplin | MO | $0 |
| Goodman & Mehlenbacher Enterprises Inc. | Kennewick | WA | Subcontractor |
| Graham Drilling, Inc. | Sheridan | MT | $0 |
| Great Lakes T. V. Seal, Inc. | Green Bay | WI | $0 |
| Greenbriar Digging Service LP | Brookhaven | MS | $0 |
| Griner Drilling Service Inc. | Columbia | MS | $0 |
| Gs Vet Group Inc. | Dallas | GA | $0 |
| Gulf Coast Utility Contractors, L.L.C. | Panama City | FL | Subcontractor |
| Guthrie Sales & Service Company, Inc. | Brentwood | TN | $0 |
| G. W. Tatro Construction, Inc. | Jeffersonville | VT | $0 |
| Haier Plumbing & Heating Inc. | Okawville | IL | $0 |
| Hall And Heflin Septic Tank Service, Inc. | Warsaw | VA | $0 |
| " Hall's Pump & Well, Inc." | Lake City | FL | $0 |
| Hank Williams, Inc. | Norwood | CO | $0 |
| Hawkins Betty G | Blue Ridge | GA | $0 |
| Hayes Contractors, LLC | Elizabethton | TN | $0 |
| Haynie Leadership Group, Inc. | Dallas | TX | $0 |
| H.b. Development Company | Port Huron | MI | $0 |
| Heller Co. Inc. | Hot Springs National Park | AR | $0 |
| H & G Underground Utilities, L.L.C. | La Porte | IN | $0 |
| H & H Plumbing & Utilities, Inc. | Norman | OK | Subcontractor |
| Hierholzer Engineering Inc. | Marion | TX | $0 |
| High Desert Underground, Inc. | Apple Valley | CA | $0 |
| H & L Drilling Inc. | East Helena | MT | $0 |
| H L Management Service LLC | Cleveland | TN | $0 |
| Holt Services Inc. | Edgewood | WA | Subcontractor |
| Horizon Underground LLC | Bean Station | TN | $0 |
| Horton Excavating LLC | Pollok | TX | $0 |
| Howerton Construction Co. | Felicity | OH | $0 |
| Howk Well & Equipment Co. Inc. | Modesto | CA | $0 |
| HSP & H LLC | Memphis | TN | $0 |
| Hubert Donald Construction Co. Inc. | Kingsville | TX | $0 |
| Humbard Contracting, Inc. | Green Forest | AR | $0 |
| Hydra-numatic Sales Co. | Butler | NJ | $0 |
| Hydrogeologic Services, Inc. | Albuquerque | NM | Subcontractor |
| Hydro Resources - Rocky Mountain Inc. | Fort Lupton | CO | Subcontractor |
| Independent Enterprises Inc. | Oakdale | PA | $0 |
| Industrial Process Technology, Inc. | Mitchell | SD | $0 |
| Infrastructure Systems, LLC | Orleans | IN | $0 |
| Inland Waters Pollution Control Inc. | Detroit | MI | $0 |
| Inliner Solutions, LLC | Orleans | IN | Subcontractor |
| Innova Engineering, LLC | Tucson | AZ | Subcontractor |
| Integrity Inspection Solutions, Inc. | Caldwell | ID | Subcontractor |
| Ipr Northeast LLC | Hyattsville | MD | Subcontractor |
| Ipr Southeast LLC | Tucker | GA | Subcontractor |
| Iron Horse LLC | Fairview | OR | $0 |
| Irvine Pipeline Co. Inc. | Riverside | CA | Subcontractor |
