| Business | Phone |
| Boulder Creek Contractors Winthrop 98862 | (509) 996-3513 |
| Doug Haase Excavating Inc 272 Twin Lakes Rd, Winthrop 98862 | (509) 996-2033 |
| James A Wright Construction 19108 State Route 20, Winthrop 98862 | (509) 996-3249 |
| S & L Svc 595 E County Rd, Winthrop 98862 | (509) 429-1407 |
| S & L Svc & Excavation 595 Twisp Winthrop Eastside Rd, Winthrop 98862 | (509) 996-2544 |