Facts
- Overview
- Tunnel under Knapps Hill on Alt US 97
- Location
- Chelan County, Washington
- Status
- Open to traffic
- History
- Built 1936
- Design
- Tunnel
- Dimensions
-
Total length: 788.1 ft.
- Inventory number
- BH 34150 (Bridgehunter.com ID)
- Inspection
- Average daily traffic (as of 2002)
- 3,427