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Isthmus Slough Bridge

Photo taken by Michael Goff on March 20, 2008

Overview: Bascule bridge over Isthmus Slough on Coos River Highway
Location: Coos Bay, Coos County, Oregon
Status: Open to traffic
History: Built 1931
Builders: - Conde B. McCullough of Redfield, North Dakota (Bridge Engineer)
- Liesch & Tofte (Contractor)
Design: Double leaf Chicago style bascule lift
Dimensions: Length of largest span: 140.0 ft.
Total length: 1,691.0 ft.
Deck width: 27.0 ft.
Approximate latitude, longitude: +43.35644, -124.19395 (decimal degrees)
43°21'23" N, 124°11'38" W (degrees°minutes'seconds")
Approximate UTM coordinates: 10/403247/4801090 (zone/easting/northing)
USGS topographic map: Coos Bay
Inventory numbers: OR 01132F (Oregon Dept. of Transportation structure number)
BH 29927 (Bridgehunter.com ID)
Inspection (as of 02/2012): Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 46.6 (out of 100)
Average daily traffic (as of 2010): 3,000