Work Elements A, B and C are covered under the CTUIR Project 2008-202-00.  They are tracked here and included only for context (e.g., EC tracking)

Project spans two contract periods over a 24 - 30 month duration covering design (Year-1) and the subsequent construction of restoration features (design implementation) in Year-2.

This contract is to complete the Implementation Phase (Year 2):  
  -- any subsequent design modifications that may be required (following review), or as an adaptation in response to changes in channel geomorphology or site conditions (since completion of the design phase)
  -- permitting
  -- environmental and cultural resource clearances, and
  -- implementation of the design (construction of improved habitat features, and actions to restore ecological function).

Summary: This contract will be used to fund the implementation...  of restoration actions in the Tucannon River, at Project Area 1 (RM 49.3-50.0), including: environmental compliance as needed, materials acquisition & transport, and the placement of constructed features in the Tucannon River. The project implementation schedule is targeted for construction in 2014.  

Enhancing and restoring instream habitat in this project area will be accomplished through a variety of treatment actions in the main channel, along the banks, and within the floodplain. These treatments include construction of instream habitat features such as Large Woody Debris (LWD) complexes, engineered log jams (ELJs), re-activation of historical side channels, removal of infrastructure such as spoils material and artificial embankments near an adjacent campground slated for removal by WDW, creation of pocket habitat via boulder placement, rectification of passage concerns associated with pre-existing cross vane structures built by state/county agency personnel over a decade ago which are operating outside of state passage criteria. and the installation of riparian plantings.  The principal benefits of project implementation will be restoration of historic spring Chinook spawning, rearing, and migration corridor habitats.  The associated treatment of riparian areas is expected to induce naturally occurring repair, restoration, and recovery of both floodplain and riparian zone function and processes.

The primary restoration objective identified for PA 1 is to improve; floodplain connectivity, and habitat complexity through the placement of whole conifer trees and boulders, and riparian conditions. Project designs will be a collaborative effort with landowners United States Forest Service (USFS) and the Washington Department of Fish and Wildlife (WDFW). Implementation strategies and materials shall be consistent with operational and sizing guidelines accepted by the cooperating partnership entities.  Designs will incorporate objectives set by the Tucannon Habitat Programmatic (2010-077-00) improvement for the Tucannon River core spring Chinook spawning and rearing area by approaching the target of having one piece of LWD per active channel width.  A total of 50 (3'x3') boulders and 200 trees shall be added to the project area via helicopter and trackhoe. Selection of aerial placement of key member tree materials during implementation is essential for achieving required sizing of trees, of which will be supplemented via ground implementation with smaller trees and boulders. Proper sinuosity shall be achieved by channel shaping and side channels shall be re-activated by excavating and/or deflection flows o re-activate widespread floodplain function.

Design Focus:  Emphasis is on increasing in-channel complexity through the placement of LWD to promote the reduction of channel confinement.  A description of the project area with respect to existing natural processes and habitat conditions is provided in the Design Report, along with the specific physical and biological objectives that the proposed restoration features are expected to address and achieve.  In addition, the project’s contribution to the overall watershed-scale restoration plan is described.  Construction considerations, implementation cost estimates, and best management practices are included for the treatment actions proposed in the restoration plan and Design Reports for Area 1.

Expected Implementation Actions (from the Design Report):  Re-invigorate floodplain, habitat complexity, and braided channels. Install ELJs and other LWD to initiate side channel development through the floodplain and reactivate areas adjacent to a state owned campground of which is slated for removal just prior to 2014 implementation. Remove detrimental anthropogenic infrastructure on the land surface such as levees and spoils and modify existing wood and rock structures to improve their habitat benefits and reduce impediments to natural processes.  (Re)plant adjacent floodplain and riparian areas; re-vegetate and restore disturbed construction access sites, staging areas, and decommissioned campground sites.    

Potential Challenges:  Access to treatment areas via ground mobilization may cause short-term disturbance, but minimized by a well designed planning of the access routes. Some trees and other existing vegetation may be disturbed in the process of gaining access to and placing the LWD structures and channel shaping. LWD placement strategies will consider remedies towards minimizing the potential for a degree of material mobilization not sought.  
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Design Phase (provided here for context):  The Year-1 contract encompassed:
- a final assessment, design report, and project design,
- any subsequent design modifications (following review), and
- the initiation of permitting requirements, and environmental and cultural resources clearances, if possible.

Background:  Under prior contracts, the Columbia Conservation District (CCD) coordinated the development of a habitat restoration plan for the Tucannon River from RM-30 upstream to RM-50. CTUIR cooperated in the effort by providing professional input as well as financing for aspects of the assessment of the Tucannon Watershed. Through empowerment of the Programmatic dedication of additional funds to the Tucannon Chinook salmon recovery effort, the Snake River Salmon Recovery Board (SRSRB) and Tucannon Coordination Committee (TCC) have supported the completion of restoration assessment and planning from RM-30 downstream to the confluence of the Snake River.  This Conceptual Restoration Plan (Anchor QEA, 2011) has prioritized projects into three Tiers (1-3) based on the projected effects of implementation as a benefit to Snake River spring Chinook, cost-efficiency relative to those benefits, and the feasibility of construction.  Project Area 1 was identified as a high priority reach in the Tucannon Geomorphic Assessment. The TCC assigned sponsorship of this particular project to Confederated Tribes of the Umatilla Indian Reservation (CTUIR) and the Regional technical team (RTT) concurred.  The CTUIR is responsible for surveying, developing the design, permitting, obtaining clearances, implementing the project, monitoring and maintaining subsequent restoration response.

The design of the Area-1 project will completed by CTUIR entities using Accord dollars,

The Design Plan for Project Area 1 will initiate in the late summer/early fall period of 2013, and be completed by 2014.

Status:  The Accord 2013 contract will produce the engineering design report, construction specifications, and estimate of probable costs required to permit and implement the Project Area-1 Tucannon River project.  Contract staff will to initiate and coordinate permitting requirements and environmental clearances starting in 2013  in anticipation of design implementation and project construction in the summer of 2014.  Cultural Resource protection investigations associated with planned materials staging areas, equipment mobilization, and work-site access in particular have required immediate attention and deliberate scheduling to initiate compliance actions such as surveys, and other requirements, in order for clearances to be timely during the expected construction period.  
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Future Management Considerations

Background:  The Tucannon River basin is located in Southeast Washington State in Columbia and Garfield counties.  The system-wide restoration objective for the Tucannon River is to improve habitat conditions for Endangered Species Act (ESA) listed species (Snake River Spring Chinook and Steelhead) for all life history stages.  It is expected that improved habitat conditions will lead to an increase in the abundance of listed species returning to the river.  Increasing abundance will lead to de-listing of the species, which is the overall recovery goal for the system.  Previous efforts (CCD 2004; SRSRB 2006) have identified the habitat-limiting factors associated with the decline of ESA-listed populations.

Geomorphic Implications:  LWD placement throughout the stream reach will force pools and hydraulic variability in the plane-bed channel sections, decrease instream velocities, and provide additional hydraulic complexity in the deep, incised sections. Placing ELJs in strategic locations along the left bank will promote side channel development through the former Russell property, developing a more complex channel network. Throughout the LWD placement areas, the structures will promote retention of additional LWD and bed-load that will promote building up the bed elevation over time and increasing floodplain connectivity, will ease channel confinement and allow for better floodplain connectivity during high flows.

Biological Benefits:  Adding complexity to the project area via LWD will address habitat limiting factors in the mainstem by diversifying the channel and initiating side channel development. In the short term, the pools that form at the structures will increase the available area for holding in the project area. The hydraulic diversity created by the structures will provide high-flow refuge and low-flow cover for juveniles. The structures also sort bed-load sediment, leading to the formation of spawning areas. In the long term, ELJs will promote channel complexity by splitting flow and encouraging the natural processes that drive the formation of habitat elements such as pools and side channels. The availability of diverse habitats will increase the carrying capacity for juvenile salmonids and increase the number of pools for holding adults. Levee removal and modifying the existing revetment structures will increase floodplain connectivity and the ability for the channel to migrate throughout the valley. In the long term, increased floodplain connectivity will lead to better riparian conditions that drive many ecosystem processes that are beneficial to both aquatic and non-aquatic species.   Show More