Tucannon River Geomorphic Assessment and Design
Salmonid Restoration Planning and Assessments
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| 10-1831 P | | Snake River | | 12/10/2010 | | 03/10/2013 | | 2008 | | Completed | | 05/01/2025 | | |
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Description
The Walla Walla Community College coordinated with the Columbia Conservation District (CCD) in the completion of the Tucannon R Geomorphic Assessment & Habitat Restoration Study (Anchor April 2011) of the entire 50 miles of the main stem Tucannon River. This report led to the development of the Conceptual Restoration Plan, Reaches 6-10 (Anchor Nov 2011) followed by Reach 5 (Anchor Oct 2012) and Reaches 3-4 (Anchor Oct 2012b), for the same 50 miles. The plan illustrates the restoration objectives based on factors limiting salmonids recovery, and develops conceptual restoration actions needed to achieve desired condition. In total, 46 individual conceptual restoration projects were developed and prioritize based on expected biological response, consistency with natural geomorphic process, benefit to cost ratio and priority to recovery. The restoration concepts were developed and refined in the Regional Technical Team leading to discussion of alternatives and selection of preferred.
This project specifically funded the completion of a restoration plan for the 7 mile Reach 5 (Anchor Oct 2012), development of one tier 1 project into a conceptual design and design report (PA-24), and two projects into preliminary designs and reports (PA-14 & PA-15). PA-14 design will be developed to final for implementation in 2013-2014 and PA-15 is scheduled for final design in 2013 and implementation in 2014. Initially, it was anticipated that this project would be conducting part of the Geomorphic Assessment but, due to efficiency, the CCD completed the assessment with other funds allowing this project to instead complete a preliminary design on PA-14. Additionally, it was anticipated that at least one design project would be located within Reach 5, however none of the projects in Reach 5 were ranked as tier 1 so the three selected Tier 1 designs were located outside Reach 5.
This project is expected to benefit Chinook salmon and steelhead.
Project Benefit
The goal of this project was to capitalize on the completion of the Tucannon Geomorphic Assessment (Anchor 2011) by completing the development of the Conceptual Restoration Plan for Reach 5, develop a conceptual restoration design and two preliminary designs. Restoration will focus on the improvement of stream channel complexity and floodplain connectivity, the major factors limiting salmonids in the Tucannon. The first implementation from the design developed in this project is scheduled for July 2013. Funding Details |
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| PCSRF | $201,878 |
| Other | $39,714 |
| Report Total: | $241,592 |
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Worksites
1-Tucannon River Reach HWY 12
- Worksite Identifier: 1-Tucannon River Reach HWY 12
- Start Date:
- End Date:
Area Description
No Area Description data was found for this worksite.
Location Information
- Basin: Lower Snake (170601)
- Subbasin:
- Watershed:
- Subwatershed:
- State: Washington
- Recovery Domain: Snake River
- Latitude: 46.46054045
- Longitude: -117.83809369
ESU
- Snake River Basin Steelhead DPS
- Snake River Spring/Summer-run Chinook Salmon ESU
- Snake River Fall Chinook Salmon ESU
Map
Photos
Metrics
Metrics
- B.0
Salmonid Restoration Planning and AssessmentsY (Y/N)
- . . B.0.a
Planning And Assessment Funding 241,592.00
- . . B.0.b.1
Area Encompassed 2,696.0
- . . B.0.b.2
Stream Miles Affected 25.80
- . . B.1
Restoration Planning And CoordinationY (Y/N)
- . . . . B.1.a
Planning and Coordination funding 202,592.00
- . . . . B.1.b.8
Conducting habitat restoration scoping and feasibility studiesY (Y/N)
- . . . . . . B.1.b.8.a
| Name of plan implemented | |
| Anchor QEA October 2012, Conceptual Restoration Plan, Reach 5 Tucannon River RM 13.4 to 20, Snake River Salmon Recovery Board, Dayton WA. |
- . . . . . . B.1.b.8.b
| Description and scope of the plan implemented | |
| A restoration plan was developed for the 7 miles beginning at RM 13.4 and continued up to RM 20. The plan followed the format used on the other 43 miles of the mainstem Tucannon and has been developed as an addendum to the Conceptual Restoration Plan Reaches 6-10, Tucannon River Phase II (Anchor Nov 2011). The plan developed conceptual restoration plans for discrete projects within Reach 5 for the purpose of substantially improving habitat conditions for ESA listed salmonids. Concept development was determined based on the finding of the Geomorphic Assessment (Anchor QEA, 2011), field reconnaissance, existing species, and input from the local Regional Technical Team and public. Based on the results of the conceptual designs the project were tiered into three categories based on species benefit, conformity to natural process and cost benefit. |
- . . . . B.1.b.11
Engineering/design work for restoration projectsY (Y/N)
- . . . . . . B.1.b.11.a
| Name of plan implemented | |
| Anchor QEA, 2012, 60% Design Report Project Area 14 Tucannon River, Snake R Salmon Recovery Board, 410B East Main St., Dayton WA
Anchor QEA, 2012. Final 30% Design Report Project Area 15 Tucannon River, RM37.15 -35.35. Snake R Salmon Recovery
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- . . . . . . B.1.b.11.b
| Description and scope of the plan implemented | |
| The PA14 report described the pre-project channel and floodplain conditions of the 2.05 mile reach, what the restoration objectives for the reach are and the likely geomorphic impact of the restoration actions. The design calls for the placement of engineered log jams for the purpose of collecting and retaining sediment in gravel bars and on the floodplain. It is anticipated more wood passing into the project reach would be retained on constructed structures. Structures are also designed to agrade the stream bed so that floodplain connectivity is improved and high flow side channels are engaged.
The PA 15 report similarly described the pre-project channel and floodplain conditions of the 1.8 mile reach, what the restoration objectives for the reach are and the likely geomorphic impact of the restoration actions. This project will increase instream habitat complexity and promote natural channel processes by strategic placement of LWD, modification or enhancement of existing infrastructure, and excavation to reconnect a former mainstem channel. Collectively, the project elements target retention of mobile wood and sediment, side channel development, and increased connectivity between the river and the adjacent floodplain. An existing tributary, spring channel, and pond will also be enhanced to provide additional quality off-channel instream and riparian habitat. |
- . . B.2
Salmonid Habitat Assessment / InventoryY (Y/N)
- . . . . B.2.a
Habitat Assessment Funding 39,000.00
- . . . . B.2.d
Habitat surveysY (Y/N)
- . . . . . . B.2.d.1
Type of habitat survey/assessment (LOV)
- . . . . . . B.2.d.2
Amount of habitat assessed 943.0
- . . . . . . B.2.d.3
Amount of habitat assessed that needed restoration 872.3
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