Bridgehunter.com | Freestone Flat Road Bridge

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Freestone Flat

Looking NE.

Photo taken by Craig Philpott in March 2010

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Street View

Description

Bridge appears to be a combination of two different designs resulting from unknown retrofits or repairs. Steel stringer west end terminates at steel vertical support transition point to central and east end sections consisting of "double single" "bailey type" prefabricated truss elements with steel grate deck.

Facts

Overview: Deck truss bridge over Salmon Creek on Freestone Flat Road in Occidental
Location: Sonoma County, California
Status: Open to traffic
History: Built 1955
Design: Steel stringer west side approach with "Bailey type" prefabricated truss elements on center and east side.
Dimensions: Length of largest span: 63.0 ft.
Total length: 103.0 ft.
Deck width: 12.1 ft.
Approximate latitude, longitude: +38.37889, -122.92278 (decimal degrees)
38°22'44" N, 122°55'22" W (degrees°minutes'seconds")
Approximate UTM coordinates: 10/506744/4247857 (zone/easting/northing)
USGS topographic map: Camp Meeker
Inventory numbers: CA 20C-440 (California bridge number)
BH 11611 (Bridgehunter.com ID)
Inspection (as of 10/2011): Deck condition rating: Imminent Failure (1 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Poor (4 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 34.1 (out of 100)
Average daily traffic (as of 2008): 100

Update Log

June 6, 2010: New Street View added by Craig Philpott
March 3, 2010: Updated by Craig Philpott: Updated design and added photos

Sources

Craig Philpott - cphilpott [at] puc [dot] edu
Prefabricated Bridge Elements and Systems - US Dept. of Transportation discussion of prefabricated bridge truss systems.

Freestone Flat Road Bridge