| Shook Construction Co. | Moraine | OH | Subcontractor |
| Simple Drain Repairs Inc. | West Berlin | NJ | $0 |
| Sioux City Engineering Co. | Sioux City | IA | $0 |
| Site Engineering, Inc. | Atlanta | GA | $0 |
| Site Work Specialists, Inc. | Rapid City | SD | $0 |
| S & J Service Inc. | Hyattsville | MD | $0 |
| Slaughter Construction Company, Inc. | Bay Minette | AL | Subcontractor |
| Slowey Construction, Inc. | Yankton | SD | $0 |
| Smithco Construction Inc. | Caballo | NM | Subcontractor |
| Snedegar Construction Inc. | Bloomington | IN | $0 |
| SNL Group Inc. | Redding | CA | $0 |
| Sooner Site Utility And Construction, LLC | Oklahoma City | OK | $0 |
| Southard Construction Of Joplin Inc. | Joplin | MO | Subcontractor |
| Spaccamonti Excavating, LLC | Pueblo | CO | $0 |
| Spagnoli Excavating & Sons, Inc. | Newburgh | NY | Subcontractor |
| Spiess Construction Co. Inc. | Orcutt | CA | Subcontractor |
| Spiniello Companies | Livingston | NJ | Subcontractor |
| Spring & Associates, Inc. | Easton | MD | Subcontractor |
| SSP Industries, LP | Killeen | TX | Subcontractor |
| S St George Enterprises Inc. | Fredonia | NY | Subcontractor |
| Staab Construction Corp. | Marshfield | WI | $0 |
| Star Controls Inc. | Coral Springs | FL | $0 |
| STC Construction Inc. | Springville | NY | $0 |
| Steele & Associates Inc. | Alpharetta | GA | $0 |
| Steffl Drilling & Pump Inc. | Willmar | MN | $0 |
| Stella May Contracting, Inc. | Edgewood | MD | Subcontractor |
| Stillwater, LLC | Pasco | WA | $0 |
| Stonehouse Drilling & Construction LLC | Reno | NV | Subcontractor |
| Storms Construction Inc. | Mandan | ND | $0 |
| Strack, Incorporated | Fairburn | GA | $0 |
| Stuivenga Vessey Logging, Inc. | Grangeville | ID | Subcontractor |
| Suncoast Infrastructure Inc. | Florence | MS | Subcontractor |
| Superman Corporation | Tamuning | GU | Subcontractor |
| S.u.r. Construction West, Inc. | Winchester | NH | $0 |
| Swick Cable Contractors Inc. | Ely | IA | $0 |
| Sychar LLC | Bloomfield | NM | Subcontractor |
| Tab Contractors, Inc. | Las Vegas | NV | Subcontractor |
| Taggart Contracting, Inc. | Newfolden | MN | $0 |
| T.a.m. Construction, Inc. | Athens | OH | $0 |
| Taylor Corp. | Anniston | AL | Subcontractor |
| Taylor Northwest LLC | Bend | OR | $0 |
| T B Landmark Construction, Inc. | Jacksonville | FL | Subcontractor |
| T Buck Construction Inc. | Turner | ME | $0 |
| Temple Grading And Construction Company, Inc. | Bunnlevel | NC | Subcontractor |
| Terracon Constructors Inc. | Geyserville | CA | Subcontractor |
| Texas Aquastore Inc. | Van Alstyne | TX | $0 |
| TGS Contractors, Inc. | Minden | LA | $0 |
| T. G. Utility Company, Inc. | Jacksonville | FL | Subcontractor |
| Thein Well Company, Incorporated | Spicer | MN | $0 |
| The Mattingly Group LLC | Hollywood | MD | Subcontractor |
| Thompson Brothers Construction, LLC | Hillsboro | KY | $0 |
| Three Dog Construction Inc. | Ketchikan | AK | $0 |
| Thweatts Plumbing & Electrical LLC | Atkins | VA | $0 |
| Tierra Contracting | Santa Barbara | CA | $0 |
| Timber Mountain Construction Inc. | Grants Pass | OR | $0 |
| Toano Well And Pump Service, Inc. | Toano | VA | Subcontractor |
| Tom Brigman Contractors Inc. | Newberry | SC | Subcontractor |
| Top Grade Excavating Inc. | Farley | IA | $0 |
| Tower Works Inc. | Maple Park | IL | $0 |
| Town Of Appomattox | Appomattox | VA | $0 |
| Town Of Varick | Romulus | NY | $0 |
| Tracy E Thomas | Boonsboro | MD | $0 |
| Traut Companies | Saint Joseph | MN | Subcontractor |
| Trek Inc. | Bunkie | LA | Subcontractor |
| Trey Construction Inc. | Memphis | TN | $0 |
| Trine Construction Corp. | Saint Charles | IL | $0 |
| Trinity Excavating & Construction Inc. | Olathe | KS | $0 |
| Tri-star Contracting II, Inc. | Desert Hot Springs | CA | $0 |
| Tri-state Sewer Services LLC | Newark | DE | Subcontractor |
| Tri-state Utilities LLC | Chesapeake | VA | Subcontractor |
| Tri-valley Construction, Inc. | Yakima | WA | $0 |
| Trugrit Enterprises LLC | Elizabeth | CO | Subcontractor |
| T & T Construction Inc. | Fountain Hills | AZ | $0 |
| Tybe Company LLC | Newbern | TN | $0 |
| Ulliman Schutte Construction, LLC | Miamisburg | OH | $0 |
| Underground Construction Inc. | Minot Afb | ND | $0 |
| Underwater Resources Inc. | San Leandro | CA | Subcontractor |
| Unilliance, Inc. | Oak Harbor | OH | $0 |
| United Storm Water, Inc. | City Of Industry | CA | $0 |
| US Pipelining LLC | Langhorne | PA | Subcontractor |
| Vacri Construction Corp. | Binghamton | NY | $0 |
| Valley Pipeline Services Inc. | Palm Desert | CA | Subcontractor |
| Valley Well Drilling, LLC | Kailua | HI | Subcontractor |
| Valvetek Utility Services Inc. | Kenilworth | NJ | $0 |
| V. B. Hawthorne & Son, Inc. | Sumter | SC | $0 |
| Veteran Drilling | Norco | CA | Subcontractor |
| Vido Artukovich & Son, Inc-vidmar, Inc. A JV | South El Monte | CA | $0 |
| Viitas Excavating Inc. | Cook | MN | $0 |
| Visu-sewer, LLC | Pewaukee | WI | $0 |
| Wabash Utilities, Inc. | Vincennes | IN | $0 |
| Walters Morgan Construction Inc. | Manhattan | KS | Subcontractor |
| Walton, Inc. | Heyburn | ID | $0 |
| W. A. Rasic Construction Company, Inc. | Long Beach | CA | Subcontractor |
| Water Works Board Of The City Of Fort Payne, The | Fort Payne | AL | $0 |
| Watts Construction, Inc. | Kennewick | WA | Subcontractor |
| W. C. Spratt Incorporated | Fredericksburg | VA | Subcontractor |
| Weeks Drilling And Pump Co. | Sebastopol | CA | $0 |
| Weisz & Sons, Inc. | Bismarck | ND | $0 |
| Western Summit Constructors, Inc. | Irving | TX | $0 |
| Westland Drilling & Construction LLC | Moses Lake | WA | $0 |
