William's Creek (Shoup) Bridge Replacement

Williams Creek (Shoup) Bridge Replacement Project Header

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Acrobat Icon Newsletter for April 19, 2018  (Acrobat, 1.2 MB)

Construction Photos

What is the project, and where is the work taking place?

The project is a cooperation between the Bureau of Land Management (BLM), U.S. Forest Service (USFS), Lemhi County, Idaho, and the Federal Highway Administration (FHWA) - Western Federal Lands Highway Division (WFLHD). This project concerns the reconstruction of the Shoup Bridge and approximately 1,380 feet of Forest Highway 21, better known as Williams Creek Road and its approaches. Shoup Bridge is the primary access to the central portion of the Salmon - Challis National Forest, private property, and commercial mining operations on the west side of the Salmon River. The project is approximately 5 miles south of Salmon, Idaho just off of US Highway 93. The construction will consist of replacing the existing single-lane, 3-span concrete and steel structure with a two-lane, single span steel network-arch structure.

Why is reconstruction needed?

The existing Shoup Bridge is a single-lane structure with a limited capacity, is over 60 years old and needs to be replaced in order to continue to serve as a critical transportation link. The bridge provides vital access to local residents and emergency services; will relieve traffic conflicts caused by the existing single-lane bridge; alleviate queuing of traffic which at times backs up onto U.S. Highway 93 (US 93); and accommodate heavy truck traffic from timber harvest, forest fire, and mining operations. Removing the existing bridge piers with in the river will provide long-term benefits to threatened and endangered fish species present in the Salmon River.

What reconstruction is occurring?

The reconstruction includes widening the existing road, replacing the existing bridge, building approaches, and performing the secondary activities needed to support these actions. FHWA is constructing two 11-foot lanes with 5-foot shoulders. Guardrail will be installed at the bridge approaches and departures. Surface drainage will be accomplished through the use of drop-inlets, culverts, riprap and drainage swale. Traffic will be detoured onto a temporary structure up river while the old bridge is demolished and new abutments are constructed to accept the new bridge structure.

Documents and Updates

Map showing general vicinity of project
View a larger interactive map of the project area.

Project Details
Project # ID PFH 91(1)
Project Name Williams Creek (Shoup) Bridge Replacement Project
Location Approximately 5 miles south of Salmon, ID in Lemhi County
Awarded to RSCI
Award Date June 24, 2016
Award Amount $6,071,729.60
View Tabulation of Bids
Status Completed

Contact Information

Federal Highway Administration
Western Federal Lands Highway Division
610 East Fifth Street
Vancouver, WA 98661-3801