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An existing 8.4’x5’ open-bottom arch at RM 11.7 on Deer Creek, a tributary to the Wallowa River, is undersized and a barrier to fish passage. Additionally, a 3-foot high waterfall over a log weir 15 feet downstream of the culvert outlet ensures only large fish get past this point. Replacing the arch and removing the log weir will open 2.5 miles of habitat for juvenile steelhead trout and 5.0 miles of habitat for juvenile and sub-adult bull trout. The proposed solution is to replace this arch with a 23’(span) x 7’(rise) x 40’ bottomless concrete box with wing walls set at stream grade and remove the downstream log weir to restore up- and down-stream connectivity for all aquatic organisms. Partners include the GRMWP, BPA, & USFS. USFS engineering designs for this project are complete.
Deer Creek is a 20 mile-long creek located in the Lower Wallowa Watershed of the Wallowa River Subbasin o... f the Grande Ronde Basin. From its confluence with the Wallowa River to approximately RM 10, Deer Creek is on private land. The upper 10 miles are on USFS land, with 6 miles of that in the Eagle Cap Wilderness. The culvert proposed for replacement is at RM 11.7 on USFS land. Deer Creek contains spawning and rearing habitat for Snake River steelhead trout and bull trout, both of which are listed as threatened under the Endangered Species Act.
One of the key limiting factors to bull trout and steelhead distribution in the Lower Wallowa River Watershed are fish passage barriers such as the arch/log weir combination addressed in this proposal. Replacing this arch will restore passage to 2.5 miles of juvenile steelhead habitat and 5.0 miles of juvenile/sub-adult bull trout habitat. Replacing this arch will also eliminate the current risk of headcutting under the arch should the log weir downstream fail.
The Deer Creek arch was rated “very high” for replacement in the 2001 Culvert Fish Passage Rating and Prioritization Report by the Wallowa-Whitman National Forest (W-WNF) staff based on Region 6 fish passage evaluation criteria. The Nez Perce Tribe also ranked the Deer Creek arch and downstream log weir as high replacement priorities in Wallowa County (Barrier Prioritization, Wallowa County, 2007, www.nezperce.org/~dfrm/Watershed/). USFS aquatics personnel worked with local private, state, and tribal counterparts in identifying the need to replace this culvert, and determined that replacing this arch was the number one priority over all other culverts in the Wallowa County. The Deer Creek arch is also the W-WNF’s highest priority for replacement in 2008. Replacement of this culvert is considered a key recovery action for bull trout while also benefiting steelhead.
Proposed practice: remove log weir and replace undersized arch with concrete box.
Detailed description: An existing 8.4’(span) x 5’(rise) x 61’arch will be removed and replaced with a 23’(span) x 7’(rise) x 40’ concrete bottomless box with wingwalls. The box is designed to pass the 100-year peak flow event. The log weir downstream will be removed, and 248 total feet of stream channel (extending 116 feet upstream and 68 feet downstream of concrete box and wingwalls) will be reconstructed to its natural gradient of 5% with a bankfull width of 18’ using stream simulation design. Thirteen rock steps will be constructed approximately 20 feet apart throughout the reconstructed channel to provide grade control and imitate natural steps in the channel upstream of project area. These actions will restore access to 2.5 miles of upstream habitat for juvenile Snake River steelhead and 5.0 miles of upstream habitat for juvenile/sub-adult bull trout.
The Grande Ronde Subbasin Plan identified the Wallowa Steelhead population as a habitat priority for Grande Ronde steelhead (pg 4). Key habitat quantity and sediment loads highly impacted steelhead survival in the greatest proportion of steelhead Geographic Areas (pg. 12). The Grande Ronde Subbasin Plan Supplement (2004) Table 3-2 pg. 16 identifies key habitat quantity and sediment as key limiting factors for steelhead populations in the Lower Wallowa. Table 3-3 pg. 17 recommends identification and reduction of largest tributary sediment sources resulting in moderate improvements to steelhead abundance, productivity and diversity. Table 5-4 pg. 40 summarizes priority attributes for the Wallowa-Lostine River and includes key habitat quantity, habitat diversity, and sediment all attributes improved by this project.
The Lower Wallowa River Watershed is one of the five highest-priority Geographic Areas for the Grande Ronde Subbasin Steelhead Population (pg 16) and is a Geographic Area priority for multiple fish populations (pg 17). The EDT analysis of restoration scenarios showed that that largest potential increase in both steelhead and spring Chinook production occurs in the Wallowa River watershed. Based on this finding, priority should be given to improving fish passage in the Wallowa River watershed (pg 37).
Key issues impacting bull trout populations are increasing stream temperatures from water withdrawals and changes in riparian function, fish passage barriers, and competition with non-native species (pg 37). Bull trout strategy is to address fish passage barriers to ensure connectivity between local populations. The Subbasin Plan recommends fixing passage barriers due to low flows, diversions and culverts to restore fish passage into habitat (pg 46). Restoring watershed connectivity by restoring fish passage to good habitats has been identified as one of the methods to prioritize projects in the Grande Ronde Subbasin.
Account Type(s):
Capital
Contract Start Date:
05/01/2008
Contract End Date:
08/31/2009
Current Contract Value:
$100,595
Expenditures:
$100,595
* Expenditures data includes accruals and are based on data through 31-Mar-2025.
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All environmental compliance activities & documentation including NEPA, ESA, cultural resources & removal/fill permitting will be completed by the U.S. Forest Service (USFS) and submitted to Bonneville Power Administration (BPA) & Grande Ronde Model Watershed (GRMW).
Coordinate with the GRMW as specified in the GRMW-BPA MOU
In order to establish the roles and responsibilities of BPA and GRMW in the management of projects that are funded through the Grande Ronde Model Watershed Program, BPA and GRMW developed a Memorandum of Understanding (GRMW-BPA MOU dated 03/02/06). The intent of this MOU is to ensure coordination and consistency of the projects funded through the Grande Ronde Model Watershed Program with GRMW goals and objectives consistent with the Council's recommendations and BPA's decisions regarding funding.
The goal of this work element is facilitate the coordination as specified in the MOU. The cost of this work element is paid for with funds from three separate administration contracts with Eastern Oregon University, Union County, and Grande Ronde Model Watershed Foundation.
The USFS will manage all aspects of the project including environmental compliance, agency coordination, subcontracting, fiscal accounting and reporting. The GRMW will participate on an as-needed basis including work in Pisces, coordination, and reporting.
The cost of GRMW work in this work element is funded by the Grande Ronde Model Watershed Foundation administration contract. The cost of USFS work in this work element is funded through cost-share by the USFS.
Bottomless concrete box construction will include the following activities:
* By-pass construction and removal
* In-water work area isolation and fish salvage, if necessary
* Equipment mobilization
* Provide materials and supplies
* Removal of existing culvert
* Excavate for concrete bottomless box footings
* Construct footings
* Install pre-cast, segmented concrete bottomless box and wing walls
* Backfill structure and grade road surface
* Install 13 instream rock steps above, within & below structure
* Cleanup site, surface road
* Erosion seed all disturbed ground
All activities to be subcontracted through normal USFS construction contract process (advertise, bid and award)
Project completion report for the period of May 2008 - April 2009
Submit project completion report to BPA via PISCES attachment tab.
Progress reports must conform to BPA guidelines. See the ''formatting guidelines'' link at the Technical Reports and Publications page: https://www.cbfish.org/Help.mvc/GuidanceDocuments.
The Contractor shall report on the status of milestones and deliverables in Pisces. Reports shall be completed quarterly. Additionally, when indicating a deliverable milestone as COMPLETE, the contractor shall provide metrics and the final location (latitude and longitude) prior to submitting the report to the BPA COTR.
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