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Proposals

Project 2009-012-00 - Willamette Bi-Op Habitat Restoration
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Biop Fish Accord
 
GEOREV-2009-012-00Proposal Version 1Existing ProjectPending BPA Response2009-012-00Willamette Bi-Op Habitat RestorationThe primary goal of the project is to add to the critical freshwater habitat components necessary for the support of anadromous and native resident fish species below the Willamette River dams. The Willamette basin lowlands are dominantly privately owned and the floodplain has been significantly altered. This program links current research on the geomorphology, hydrology and hyporheic flows of the river that provide survival habitat for anadromous and resident native fish. The program will build on what is known to increase the conservation "footprint" in the floodplain and add floodplain forest and off-channel habitat for native fish. Recent sampling of floodplain habitats by ODFW has shown that steelhead and Chinook salmon use the full floodplain for rearing. While the significance of the use has not yet been determined, the extent and use of complex habitats is being documented at this time. The project is based on the awareness that the Willamette River is constrained by flow alteration from tributary flood control dams and large-scale revetment projects that limit channel dynamics. In addition the project was developed with the understanding that the floodplain was dominantly privately owned and used for urban, agricultural or aggregate mining purposes. Given that situation, a significant amount of early effort, not funded by BPA, was expended to build local non-profit capacity. Early efforts also included outreach to agricultural landowners and aggregate mining operators to identify areas of mutual interest that would allow for expanded floodplain use by aquatic resources, yet not create unnecessary conflict with other users. The early application of funding has been to conduct restoration on previously acquired conservation properties and to acquire additional conservation properties. Concurrent with the addition of lands to the conservation portfolio, funding has gone toward planning for future restoration of conservation lands. Beyond building capacity, adding conservation lands in the floodplain, and planning for future restoration, Oregon Watershed Enhancement Board (OWEB) and Meyer Memorial Trust (MMT) have invested in information that will assist improved understanding and decisionmaking in the future. MMT has funded mapping of the estimated extent of the 2-year regulated flood to illustrate biologically important areas of the floodplain. Additionally, OWEB and MMT have funded the development of a river-scale, geographic monitoring framework. The "slices" or georeferenced 100-meter cross sections of the river perpendicular to the thalweg, is a framework for monitoring change through time. The framework has been used to document historic change in floodplain forest, channel complexity, fish species presence, and cold water habitats. OWEB and MMT have funded Oregon State University to conduct fish species monitoring to sample three reaches of the river in representative habitats using the georeferenced "slices" to randomly locate sample sites. The project is intended to result in the addition of mainstem habitats for juvenile anadromous fish and other native species (Oregon chub and lamprey) that use back-water habitats. To date, the program has added approximately 2,800 acres of conserved lands along the river. There are nearly ten miles of riverfront lands available for habitat restoration in the near future. Restoration has proceeded on the Green Island properties (RM 173-175) and is funded with BPA funds for further activities in summer 2013. Restoration alternatives are being evaluated for Harkens Lake (RM 154) and Horseshoe Lake (RM 125) that are both partially funded with BPA funds. Floodplain revegetation funded by OWEB and MMT will be evaluated by effectiveness monitoring. The Floodplain Revegetation Effectiveness Monitoring program was developed to inform future revegetation projects. The habitat restoration work will be evaluated using the "slices" to monitor change by river reach. The magnitude of effects of passage at the flood control dams and other limiting factors do not allow direct changes to listed fish abundance to specific project-scale restoration projects. The program will be evaluated against the goals of a conservation vision like the "conservation 2050" scenario developed by Hulse, et.al., 2002).Kenneth Bierly (Inactive)12/17/201211/26/2013Kenneth Bierly (Inactive)Oregon Watershed Enhancement Board, Meyer Memorial TrustHabitatNone2013 Geographic Category Review2013 Geographic ReviewBiOp