Old Duncan Grade Road Bridge

Photos

Old Duncan Mills Grade

Looking north

Photo taken by Craig Philpott in September 2009

BH Photo #146311

Overview: Pratt through truss bridge over Austin Creek on Old Duncans Grd Road
Location: Sonoma County, California
Status: Intact but closed to all traffic
History: Built 1924
Design: Pratt through truss
Dimensions: Length of largest span: 117.1 ft.
Total length: 265.1 ft.
Deck width: 16.7 ft.
Also called: Austin Creek Bridge
Approximate latitude, longitude: +38.47083, -123.04694 (decimal degrees)
38°28'15" N, 123°02'49" W (degrees°minutes'seconds")
Approximate UTM coordinates: 10/495904/4258058 (zone/easting/northing)
Quadrangle map:: Duncans Mills
Elevation: 51 ft. above sea level
Average daily traffic (as of 2015): 30
Inventory number: BH 43378 (Bridgehunter.com ID)
Inspection report (as of June 2018): Overall condition: Poor
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Poor (4 out of 9)
Sufficiency rating: 42.9 (out of 100)
View more at BridgeReports.com