| Business | Phone |
| American Well Drilling Portland 97210 | (503) 274-7000 |
| Tacoma Pump & Drilling Co Inc Portland 97201 | (503) 241-9103 |
| Cascade Drilling Inc 6400 Se 101st Ave # 2d, Portland 97266 | (503) 775-4118 |
| Dbm Contractors Inc 8383 Ne Sandy Blvd, Portland 97220 | (503) 256-9662 |
| Dmi Drilling Construction 2215 Se 53rd Ave, Portland 97215 | (503) 224-8588 |
| Lzb Inc 1111 Se Stephens St, Portland 97214 | (503) 235-4625 |
| Malcolm Drilling Co Inc 5933 Ne Win Sivers Dr # 205m, Portland 97220 | (503) 222-3978 |