Facts
- Overview
- Rainbow arch bridge over North Fork Mad River on Maple Creek Road
- Location
- Humboldt County, California
- Status
- Open to traffic
- History
- Built 1928
- Design
- Concrete through arch
- Dimensions
-
Length of largest span: 144.0 ft.
Total length: 429.2 ft.
Deck width: 18.7 ft.
Vertical clearance above deck: 13.5 ft.
- Recognition
- Eligible for the National Register of Historic Places
- Approximate latitude, longitude
- +40.87000, -123.96194 (decimal degrees)
40°52'12" N, 123°57'43" W (degrees°minutes'seconds") - Inventory numbers
- CA 4C-26 (California bridge number)
BH 10912 (Bridgehunter.com ID) - Inspection (as of 07/2004)
- Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 49.8 (out of 100) - Average daily traffic (as of 1976)
- 850