A10_Atch_3_SheepBridgePhotos.pdf
PDF 14 MB Posted
- Attached to
- Teton Canyon Trail Bridge Replacements
- Solicitation number
- 1240LN25R0007
- Issued by
-
Department of Agriculture Forest Service
About this file
This document appears to be a set of site documentation and engineering photos for a bridge replacement project, focusing on the Sheep Bridge site. The images detail existing conditions, proposed modifications, and environmental restoration plans for a bridge crossing a creek. Key details include:
The project involves replacing an existing 50-foot bridge with an 80-foot prefabricated steel underhung truss bridge. Significant environmental restoration is planned, including removing existing infrastructure like earthen fill material, crib logs, gabion wire, and concrete/rebar on both north and south sides of the creek. The new bridge design aims to improve stream flow dynamics by placing abutments above the Ordinary High Water Mark (OHWM) and reshaping streambanks to match natural channel and floodplain dimensions. The site documentation includes multiple perspectives of the existing bridge, trail approaches, and detailed annotations highlighting areas of proposed removal and reconstruction.
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Text version
Existing Sheep Bridge photo looking south.
Flow is from left to right. Photo date: 6/16/2021
Earthen fill material, crib logs, & gabion wire to be removed.
Elevated boardwalk on south side.
Concrete and rebar to be removed on north side of creek.
Existing bridge looking upstream. Span = ~50 ft.
Photo date: 6/16/2021
Darker lumber is elevated boardwalk on south approach.
Existing bridge looking south: River right to river left.
North existing abutment slightly above OHWM
Existing bridge looking downstream.
South side existing bridge abutment (river left): At/near OHWM.
OHWM influenced by woody debris caught under bridge.
Elevated boardwalk and gabion on south trail approach
OHWM
OHWM is influenced by undersized bridge. Bridge span will be increased from 50 to 80 feet and elevated to increase capacity. New abutment will be placed above OHWM.
With the enlarged new bridge, the streambanks will be reshaped to match the natural channel/floodplain dimensions immediately up and downstream.
Elevated boardwalk and gabions on south trail approach
Elevated boardwalk and gabions on south trail approach.
Elevated boardwalk and gabions on south trail approach at/near OHWM. Bridge size/capacity will be increased reduce woody debris capture under bridge and restore natural OHWM.
Elevated boardwalk and gabions on south trail approach
Earthen fill material, crib logs, & gabions to be removed on south side of creek downstream of bridge.
Earthen fill material, crib logs, and gabion wire to be removed on south side of creek.
Concrete/rebar material to be removed on north side of creek downstream of bridge.
Earthen fill material, crib logs, and gabion wire to be removed on south side of creek downstream of bridge.
Earthen fill material, cribbing, & gabions to be removed on south side of creek downstream of bridge. Appears to be old bridge abutment material with log cribbing.
Crib logs with rebar/bolts
Downstream side:
Gabion WireUpstream side: Crib log
Gabion Wire Crib log
Concrete/rebar material to be removed on north side of creek downstream of bridge.
OHWM
Concrete/rebar material to be removed on north side of creek downstream of bridge – Right at OHWM.
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File details come from the government source that posted it. Updated .