| Company Name | Owner Name | Address | Phone |
| A-C Construction | Robert Cox | 9324 Badger Canyon Road Benton City WA 99320 | (509)6283689 |
| Adrian's Excavating | Thomas Adrian | 2805 W. Corral Creek Rd. Benton City WA 99320 | (509) 588-3101 |
| Alba's Excavating | John R. Alba | PO Box 25 Grandview WA 98930 | (509) 882-2047 |
| Badger Development | Clayne Wiser | 22307 S. Cottonwood Dr. Kennewick WA 99338 | 509-521-2282 |
| Bauder Grading & Excavation LLC | Cory Bauder | 1963 Saint Street, Site #7 Richland WA 99354 | 509-438-8628 |
| Bear Excavation Inc | Walt Bear | 45309 S 4600 PRSE Kennewick WA 99337 | 509-582-4817 |
| Bert's Excavating | John Dalrymple | PO Box 73 Sunnyside WA 98944 | (509) 837-2117 |
| Big Ds Construction | Duane Howard | 3902 N Swallow Ave Pasco WA 99301 | (509) 542-8322 |
| C & E Trenching | Everett Wray | 2761 W. Sagemoor Rd. Pasco WA 99301 | 509-545-6940 |
| Cadillac Lawn Care Inc. | Raymond D. Goehring | POB 1930 West Richland WA 99353 | (509) 628-0111 |
| Conrad Russell Excavation LLC | Conrad Russell | 100513 W. OIE Hwy Prosser wa 99350 | 509-973-1140 |
| Cox Excavating | Phil Cox | 8800 Selph Landing Road Pasco WA 99301 | (509) 547-6527 |
| Culbert Construction | Steve Culbert | 4908 Sonora Drive Pasco WA 99301 | 509-544-0229 |
| D-D Tri Rivers Excavation | David Matson | 19624 Webber Canyon Road Benton City WA 99320 | (509) 588-3711 |
| Don Pratt Construction | Dale Perry | 7535 W. Kennewick Ave, Ste I Kennewick WA 99336 | 509-735-9182 |
| Four Point Construction | Ken Kites | 586 S. 38th Avenue #28 West Richland WA 99353 | 509-539-1044 |
| G Star | Juan Gamez | 24001 Bunn Road Prosser WA 99350 | 509-391-7283 |
| Goodman & Mehlenbacher Enterprises, INC | Tim Goodman | 37133 S. Olympia Kennewick WA 99337 | 509-582-5570 |
| Grant Co. Excavation LLC | J.L. Hawkins | POB 96 Ephrata WA 98823 | (509)754-9712 |
| Hutchison Construction | Larry Hutchison | 137275 E. Christensen Road Kennewick wa 99338 | 509-539-4649 |
| Intermech Inc. | James Jarrett | PO Box 1370 Richland WA 99352 | (509) 628-9141 |
| J&B Enterprises | Jim Ezell | 245504 E. Hover Road Kennewick WA 99337 | (509) 528-1857 |
| Jahns Pipe Construction, Inc | David Jahns | 2731 W Hwy 26 Othello WA 99344 | (509) 488-2842 |
| Jenkins Excavating | F. Eugene Jenkins | 9703 W. Court Street Pasco WA 99301 | (509) 547-9478 |
| Joe Rada Excavating | Joe Rada | 440 Merry Lane Burbank WA 99323 | 509-727-2085 |
| John Marvin, Inc. | Marvin Thurgood | 5335 W. Van Giesen West Richland WA 99353 | (509) 967-2940 |
| John Rada Excavating Inc. | John Rada | 2501 E. Lewis Place Pasco WA 99301 | (509) 547-3509 |
| K. Kaser | Dale Nichols | 229 N. Fruitland Kennewick WA 99336 | (509) 586-7335 |
| Mahaffey Enterprises Inc. | Dustin Mahaffey | 1213 S. Clodfelter Road Kennewick WA 99338 | (509) 627-4593 |
| Meeske Excavation | Mitch Meeske | 25001 N. Rothrock Rd. Prosser WA 99350 | (509) 832-2354 |
| Mr. Rooter Plumbing | Shaylin King | P.O. Box 826 Richland wa 99352 | 509-628-9069 |
| Murphey Brothers General Excavation | Rick Murphey | 144001 W. Johnson Road Prosser WA 99350 | 509-786-3103 |
| MVL Inc DBA Aqua Test Inc. | Matt Lee | 28620 Maple Valley Black Diamond Rd Maple Valley WA 98038 | (206) 718-7035 |
| Onsite | Byron Jones | 107610 E. 245 PRSE Kennewick WA 99338 | 509-628-2150 |
| Pegram Construction | Doyle Pegram | PO Box 418 Othello WA 99344 | (509) 488-2246 |
| Pipe of Washington | Dale Ainsworth | POB 4772 Pasco WA 99301 | (509)366-0738 |
| Precision Leasing and Sales | Erin Hamilton | P. O. Box 3535 Pasco WA 99302 | 509-547-6699 |
| Premier Excavation | Todd Johnson | 2222 Robertson Dr Richland WA 99354 | 509-375-1805 |
| PS Northwest Construction Inc. | Paul Stamschror | 3091 Scoon road Sunnyside WA 98944 | 509-839-3378 |
| R-2 Construction | Rick Harper | 18621 S. Haney Road Kennewick WA 99337 | (509) 582-3319 |
| Rada Inc. | Debi Rada | 2707 E. Lewis Place Pasco WA 99301 | 509-547-3974 |
| Ray Poland & Sons Inc. | John E. Lynch | 503 W Columbia Dr Kennewick WA 99336 | (509) 586-2158 |
| Red-D Backhoe Service | Mike B. Diorio | PO Box 3781 Pasco WA 99301 | (509) 547-7234 |
| Roto-Rooter | John Freand | 801 S Clodfelter Kennewick WA 99336 | (509) 783-7311 |
| Scout Lake Construction | Jeff Hudson | 830 Nagler Road Selah WA 98942 | (509)697-4425 |
| Selland Construction Inc. | Brad Selland | 1285 S. Wenatchee Ave. Wenatchee WA 98801 | (509)662-7119 |
| Shoemaker Excavation | Cameron Shoemaker | 34004 S Gerards Road Kennewick WA 99337 | 509-582-4769 |
| Stuth Company Inc. | Bill Stuth | PO Box 950 Maple Valley WA 98038 | (425) 255-3546 |
| Tri City Sales Inc. | Jay Compton | PO Box 7347 Kennewick WA 99336 | (509) 727-8757 |
| Triple S Excavating, Inc. | Lars Michelson | 4308 Cochins Lane Pasco WA 99301 | 509-318-0090 |
| Van Belle Construction Inc | Kyle Van Belle | 1306 Desert Cove Prosser WA 99350 | 509-781-0551 |
| Watts Construction, Inc. | Loren Watts | 4828 Southridge Blvd. Kennewick WA 99338 | 509-735-7969 |
| Wentz 20X Excavating | Craig A. Wentz | 155808 W. Buena Vista Rd. Prosser WA 99350 | (509) 781-1266 |