Sweetwater Creek Bridge

Salmonid Habitat Restoration and Acquisition

Project ID	044 05 CW
Recovery Domains	Snake River
Start Date	04/10/2006
End Date	12/31/2007
Year	2005
Status	Completed
Last Edited	01/14/2025

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Description

Plans and specifications were done and the new bridge consists of pre-cast, pre-stress concrete tri-deck beams on pile driven foundations. The old culvert was removed; the channel was reshaped and rip-rapped. The bridge component was completed on August 22, 2007 and the disturbed areas were re-vegetated with native trees, shrubs and grasses by December 2007.

The project removed the blockage, increased fish passage, improved channel conditions, and increased spawning and rearing fish habitat for Snake River Basin ESU Steelhead. In addition, the bridge will pass flows in excess of a 500 year event as compared to a culvert designed for a 100 year flood event.

Project Benefit

This will remove the existing fish barrier and replace it with a bridge structure that will provide a natural stream bed to facilitate passage for ESA listed Snake River Basin ESU Steelhead.

Accomplishments

Metric

Completed

Originally
Proposed

Riparian Habitat

Stream Miles Treated

.10

Acres Treated

Fish Passage

Barriers Removed

Miles Opened

5.74

Source

Funds

PCSRF

$175,582

State

$56,443

Report Total:

$232,025

Worksites

Sweetwater Creek

Worksite Identifier: Sweetwater Creek
Start Date: 07/30/2007
End Date: 12/19/2007

Area Description

No Area Description data was found for this worksite.

Location Information

Basin: Clearwater (170603)
Subbasin: Clearwater (17060306)
Watershed:
Subwatershed:

State: Idaho
Recovery Domain: Snake River
Latitude: 46.318578
Longitude: -116.846895

ESU

Snake River Basin Steelhead DPS

Map

Photos

Metrics

C.0 Salmonid Habitat Restoration and AcquisitionY (Y/N)

. . C.0.a Habitat restoration and acquisition funding 232,025.00
. . C.0.b Length of stream treated/protected .75
. . C.0.c
Project identified in a Plan or Watershed Assessment

NPT/Watershed. 2004. Fish Passage Assessment. Lapwai, Idaho. NPCC. 2003. Draft Clearwater Subbasin Management Plan. Portland, Oregon.
. . C.0.d.1 Project Monitoring (LOV)
. . C.0.d.2 Monitoring Location (LOV)

. . C.0.d.3

Monitoring text (from Phase I)

Pre work and post implementation monitoring was conducted for this project. The subgrantee documented that the structure was built as planned and redocumented the newly constructed streambed which has a different subplane. The bridge engineering document on file with the Office of Species Conservation. In addition, the stream channel will be monitored at the bridge locations to ensure no head cutting occurs. Given the flashy nature of the system and the amount of bed load that moves, the channel will be allowed to adjust on its own for two years. After two high flow events the sites will be revisited by an in-house interdisciplinary team to determine if any further work is needed. All plantings will be monitored for survival and species composition by randomly selected one meter square vegetation plots using a Daubenmire frame and 5m survival plots.

. . C.2 Fish Passage ImprovementY (Y/N)
- . . . . C.2.a Fish Passage Funding 228,025.00
- . . . . C.2.b.1 Length of stream made accessible 5.74
- . . . . C.2.b.3 Type of blockage/barrier (LOV)
- . . . . C.2.b.4 Number of blockages/impediments/barriers impeding passage 1
- . . . . C.2.g.1 Bridge installed or improved at road stream crossingY (Y/N)
  - . . . . . . C.2.g.2 Number of bridges installed or improved/upgraded 1
  - . . . . . . C.2.g.3 Miles of stream made accessible by bridge installation or improvement/upgrade 3.54
- . . C.5 Riparian Habitat ProjectY (Y/N)
  - . . . . C.5.a Riparian Habitat Funding 4,000.00
  - . . . . C.5.b.1 Total riparian miles streambank treated .10
  - . . . . C.5.b.2 Total Riparian Acres Treated .1
  - . . . . C.5.c.1 Riparian plantingY (Y/N)
    - . . . . . . C.5.c.2
      Species of plants planted in riparian
      
      Salix exigua, Cratageus douglasii, Cornus sericea, Populus trichocarpa, Rosa woodsii, Symphoricarpos albus
    - . . . . . . C.5.c.3 Acres planted in riparian .1