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Rainbow Bridge

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Overview
Steel through arch bridge over Swinomish Slough on Pioneer Parkway in La Conner
Location
Skagit County, Washington
Status
Open to traffic
History
Built 1957
Builders
- Harry R. Powell (Design Engineer)
- Neukirch Brothers (Contractor)
Design
Steel through arch
Dimensions
Length of largest span: 580.1 ft.
Total length: 797.0 ft.
Deck width: 24.0 ft.
Vertical clearance above deck: 16.6 ft.
Recognition
Eligible for the National Register of Historic Places
Approximate latitude, longitude
+48.38691, -122.50253   (decimal degrees)
48°23'13" N, 122°30'09" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/536831/5359424 (zone/easting/northing)
USGS topographic map
Anacortes South
Inventory number
BH 34485 (Bridgehunter.com ID)
Inspection (as of 04/2012)
Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 56.4 (out of 100)
Average daily traffic (as of 2012)
4,967

Sources 

  • K. A. Erickson