Mount Si Road Bridge

Photos

Removing the deck of the old bridge

Photo Courtesy of King County Department of Transportation

BH Photo #132896

Overview: Through truss bridge over Middle Fork Snoqualmie River on Mount Si Road in Tanner
Location: King County, Washington
Status: Replaced by a NEW THROUGH TRUSS bridge in 2008
History: Built 1904; rehabilitated 1955, Replaced 2008-09
Design: Pin-connected, 9-panel Parker through truss
Dimensions: Length of largest span: 171.9 ft.
Total length: 290.0 ft.
Deck width: 19.0 ft.
Vertical clearance above deck: 14.0 ft.
Recognition: Eligible for the National Register of Historic Places
Approximate latitude, longitude: +47.48667, -121.76000 (decimal degrees)
47°29'12" N, 121°45'36" W (degrees°minutes'seconds")
Approximate UTM coordinates: 10/593411/5259993 (zone/easting/northing)
Quadrangle map:: North Bend
Inventory number: BH 34307 (Bridgehunter.com ID)