| Business | Phone |
| A A Earth Auger & Concrete 8222 Pipeline Rd E, Tacoma 98443 | (253) 531-6954 |
| Slead Construction 9021 Waller Rd E, Tacoma 98446 | (253) 531-2409 |
| Layne Geo Construction 10906 D St E, Tacoma 98445 | (253) 536-1161 |
| Holocene Drilling Inc 3719 70th Ave E B, Tacoma 98424 | (253) 922-7040 |