Background:  The Tucannon River basin is located within the ceded-area of the CTUIR 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.  The long term goal of increasing abundance should lead to de-listing of the species, which is the overall recovery goal for the system. Previous assessment efforts (CTUIR, WDFW, CCD and SRSRB) have identified the habitat-limiting factors associated with the decline of ESA-listed populations.  

The Tucannon River Geomorphic Assessment & Habitat Restoration Study (Anchor QEA, April 2011) identified and prioritized stream reaches and restoration actions which would best improve habitat for salmonids.  Focusing on the high priority areas for Tucannon spring Chinook, the Columbia Conservation District (CCD) coordinated the development of a habitat restoration plan for the Tucannon River from RM-20 upstream to RM-50; the CCD continued to work with the Snake River Salmon Recovery Board (SRSRB), through the Tucannon River Programmatic Habitat project, and extended the Tucannon River restoration plan from RM-20 downstream to the confluence of the Snake River.  This Conceptual Restoration Plan (Anchor QEA, November 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.

Overview: The Snake River Salmon Recovery Board (SRSRB) manages the Tucannon River Programmatic Habitat Project (2010-077-00) through a parent contract for the operations support, management organization, implementation assistance, and reporting described in this summary. The goal of the Tucannon River programmatic is to restore habitat function and natural channel processes in the spring Chinook priority restoration reaches of the Tucannon River, leading to improved population productivity and abundance.  The CTUIR manages this contract as a contribution in support of programmatic goals, consistent with the CTUIR River Vision: a desired riverine system that is shaped and maintained by the dynamic interactions and interconnections of its natural physical and ecological processes. The restoration actions proposed for implementation in the prioritized river segments promote and enhance the interconnected nature of the five primary touchstones of the Tribes' Vision: a) hydrology, b) geomorphology, c) connectivity, d) riparian community, and e) aquatic biota.  

Major limiting factors influencing the condition of these touchstones throughout the project reaches proposed for treatment in the watershed, include:  
  • Anthropogenic modifications affecting and causing the loss of natural channel forming processes that link the Tucannon River to its floodplain;
  • Loss of key in-channel habitat complexity and structure, including diversity and quantity, especially in the form of gravel sorting, varied velocities, and pools associated with recruitment of large wood; and
  • Elevated summer water temperature, and reduced flow duration.
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Contract Summary: This contract continues the CTUIR role anticipated in the Accords (BPA) and the Tucannon Habitat Programmatic Project: to inform and conduct project evaluation, selection, management, implementation planning, data collection, monitoring, outreach and other tasks, where tribal staff can provide expertise; and to be an implementer of the on-the-ground project construction activities for projects identified in the Programmatic work plan, and sub-regional Snake River Salmon Recovery Plan. Contract tasks include identifying and sequencing projects for implementation pursuant to the prioritized restoration strategy of the Habitat Programmatic, and consistent with the Tribes' First-Foods paradigm and River Vision principles; the CTUIR staff will partner with SRSRB participants and others to implement the priority projects.

This yearly contract supports the recurring development of future habitat project concepts, refinement of restoration approaches, the production of engineered designs for selected projects, implementation work-planning and construction scheduling for approved projects, and the build-out of completed projects.

  • Ongoing: In this contract term, CTUIR staff continues to support and maintain watershed coordination with SRSRB, CCD, WDFW and Nez Perce Tribe, through ongoing communication and collaboration, shared work-tasks, and monthly and quarterly meetings. The CTUIR is also a member of and attends the meetings of the SRFB Lead-Entity committee, to review, rank and select projects for funding in the State of Washington (RCO) Salmon Recovery sub-regional process for the Snake River. CTUIR staff attends SRSRB (Board) Meetings on a monthly basis, and acts as the RTT Board Liaison to ensure pertinent information is transferred from the RTT to the Board. The CTUIR continues project development efforts and implementation tasks addressed to improving habitat structure and function at Project Areas (PA) throughout the Tucannon Watershed.

  • Current: Habitat project development, design and implementation emphases in the current contract period are at: PA-17 and PA-27/28.1. Longer-term efforts at PA-18 continue to be evaluated and monitored. Actions proposed in these project areas are identified as a high priority for habitat improvements (Anchor QEA, Nov 2011), and focus on increasing the amount of large wood debris (LWD) to increase channel complexity and floodplain connectivity, the highest priority outcomes for spring Chinook in the Tucannon. Description of the project areas with respect to existing natural processes and habitat conditions is to be provided in the associated project Design Reports, along with the specific physical and biological objectives that the proposed restoration features are expected to achieve for each phase of the design/build-out for these project areas.  
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Workplan (FY21): CTUIR will lead the implementation management and supervision for: pre-construction tasks, site preparation, materials acquisition, permitting, and design finalization in PA-17 and for the second half of Phase-I (0.5-1.0) at PA-27/28.1.  

(1)  Project Elements (PA-17/18): Included in the Hartsock Floodplain Restoration Project (WDFW), Phase-1 of the Hartsock project area (PA-18) was completed in summer of 2017; the intention is to be ready for implementation of Phase-II of the PA-17/18 design in 2021. Note (caveat): CTUIR staff expects these next phases (Phase-2 and beyond in PA-17) to be challenging as we move from public to private lands. CTUIR anticipates needed flexibility in the dates for project design completion and implementation planning, to adapt to changing circumstances, adjusting time frames as development proceeds.

Phase-2 (FY2021/22): work with local landowners to confirm restoration project commitments on the upper 1.5 miles: PA-17  
  -- Ongoing restoration planning with additional local landowners to determine interest in a future restoration project;
  -- Complete landowner agreements verifying landowner participation in the restoration project;
  -- Continue project design review with Tucannon implementers and landowners in PA-17, currently at 60% design stage;
  -- Work through project design to 100% with Tucannon implementers and landowners, identify project elements and start permitting during Spring 2021.  
  -- Project implementation would start summer of 2021, if momentum continues with willing landowners in PA-17.

Phase-3 (FY2022/23): work with Columbia County and private landowners in the bottom of reach: PA-18
  -- Long-term planning with Columbia County for the replacement of the downstream Tucannon River Road Bridge;
  -- Work with private landowners to gauge interest in levee removal and side channel reactivation;
  -- Complete landowner agreements verifying landowner participation in the restoration project;
  -- Start project design with Tucannon implementers and landowners in PA-18 starting with 15% design;
  -- Work through project design to 100% with Tucannon implementers and landowners, identify project elements and start permitting during 2022;
  -- Project implementation would start summer of 2022, if we have willing landowners in PA-18; and if we can find funding to replace Columbia County Bridge.

(2)  Project Elements (PA-27/28.1): In addition to further developing Phase-II and managing the work at PA-17/18, CTUIR staff will also be managing project implementation for the second-half of Phase-I at PA-27/28.1 (Phase I-B).

Phase I-B (FY2021): the initial-half of the project originally proposed as Phase-I was completed during the abbreviated Summer 2020 work-period.
  -- Currently in the design phase (see contract #73982 REL98), to be ready for implementation by Jul 2021;
  -- CTUIR project staff will be working with the private landowner and design subcontractor through the design period in an accelerated timeframe (Dec-Jun);
  -- 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.

Phase II (FY2022/23): the intention is to be ready for implementation of Phase-II of the PA-27/28.1 design in 2022.
  -- The design focus for the project area is on improving the multiple habitat structure, floodplain connection, and stream function deficiencies associated with this reach of the Tucannon River;
  -- The project’s contribution to the overall watershed-scale restoration plan will be described in each of the phased Basis of Design Reports (BDR);
  -- The anticipated 30-60% designs for both phases, will identify the following types of measures that can address spring Chinook limiting factors, and the touchstones of the CTUIR River Vision: 1) Increasing large woody debris loading to promote instream habitat quantity, quality/complexity; 2) Increasing instream habitat quantity/quality with habitat boulder clusters; 3) Hydraulically reconnecting the river with its floodplain through side channel construction (improved off channel habitat, floodplain vegetation); 4) Restoring riparian forest vegetation to promote future large wood loading and summer water temperature reductions; 5) Replacing downstream bridge to increase flood conveyance, and reduce upstream geomorphic effects;
  -- These design features are intended to benefit spring Chinook by providing better refuge and spawning habitat for adults, reducing redd-scour during winter flood events, and increasing rearing habitat and over-winter survival for juveniles;
  -- Construction considerations and best management practices will be included in the BDR for each development phase and in the 80% design drawings that support the proposed treatment actions, once they are completed.