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Old Mattole Road Bridge

Photos 

Old Mattole Roat Bridge

Photo taken by Walt Frazer in June 2008

BH Photo #121855

Map 

Facts 

Overview
Pratt half-through truss bridge over McNutt Creek on Old Mattole Road
Location
Humboldt County, California
Status
Open to traffic
History
Built 1926
Design
Pratt half-through pony truss
Dimensions
Span length: 84.0 ft.
Total length: 84.0 ft.
Deck width: 13.1 ft.
Approximate latitude, longitude
+40.35278, -124.33278   (decimal degrees)
40°21'10" N, 124°19'58" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/386820/4467765 (zone/easting/northing)
Quadrangle map:
Petrolia
Average daily traffic (as of 1979)
100
Inventory numbers
CA 4C-69 (California bridge number)
CA 04C-69 (California bridge number)
BH 10917 (Bridgehunter.com ID)
Inspection report (as of March 2016)
Overall condition: Fair
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Very Good (8 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 62.2 (out of 100)
View more at BridgeReports.com

Update Log 

  • February 17, 2010: Updated by Craig Philpott: Detailed truss design description
  • August 18, 2008: New photos from Walt Frazer

Sources 

  • Walt Frazer - abooks [at] humboldt1 [dot] com
  • Craig Philpott - craigphilpott63 [at] gmail [dot] com