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McGary Grade Road Bridge

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McGary Grade Road Bridge

Photo taken by Mike Goff in May 2012

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Overview
Polygonal Warren pony truss bridge over Potlatch River on McGary Grade Road
Location
Nez Perce County, Idaho, and Latah County, Idaho
Status
Open to traffic
History
Built 1935; rehabilitated 1970
Design
Polygonal Warren pony truss with alternating verticals
Dimensions
Length of largest span: 107.9 ft.
Total length: 109.9 ft.
Deck width: 25.3 ft.
Approximate latitude, longitude
+46.58952, -116.68662   (decimal degrees)
46°35'22" N, 116°41'12" W   (degrees°minutes'seconds")
Approximate UTM coordinates
11/523535/5159341 (zone/easting/northing)
USGS topographic map
Juliaetta
Inventory numbers
ID 29840 (Idaho bridge number)
BH 14938 (Bridgehunter.com ID)
Inspection (as of 09/2011)
Deck condition rating: Fair (5 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 48.5 (out of 100)
Average daily traffic (as of 2010)
120

Update Log 

  • May 7, 2012: Updated by Mike Goff: Corrected design and added photos

Sources 

  • Mike Goff - michael [dot] goff [at] hotmail [dot] com