| Business | Phone |
| Metropolitan Sewer Svc 114 Sw 129th St, Seattle 98146 | (206) 542-5466 |
| Spraylawn Hydroseeding Seattle 98188 | (206) 941-2040 |
| Puget Sound Dredging Co 810 3rd Ave 201, Seattle 98104 | (206) 623-7775 |
| Versatile Drilling Contractors 7201 Detroit Ave Sw, Seattle 98106 | (206) 763-9776 |
| Leary Construction Co 2442 Nw Market St, Seattle 98107 | (206) 783-0309 |
| Northwest Boring 7023 Perimeter Rd S, Seattle 98108 | (206) 768-2786 |
| Water Tectonics Inc 1545 W Nickerson St, Seattle 98119 | (206) 284-9330 |
| Peacefield Construction 611 22nd Ave, Seattle 98122 | (206) 760-4545 |
| Seattle Sewer Svc Seattle 98125 | (206) 363-6736 |
| O'Neill Plumbing Co 6056 Califnoria Ave Sw, Seattle 98166 | (206) 241-4822 |
| Terra-Firma Drilling 2426 Sw 172nd St, Seattle 98166 | (206) 243-9681 |