Bonanza City Stream & Floodplain Project, P3

Salmonid Habitat Restoration and Acquisition

Instream Habitat Riparian Habitat Upland Habitat And Sediment
Project ID018 19 SA
Recovery DomainsInterior Columbia
Start Date03/01/2020
End Date10/31/2022
Year2019
StatusOngoing
Last Edited04/15/2022
 
1 - 1

Description    


Phase III of the Bonanza City Stream & Floodplain Project will continue the work of rehabilitating river function, complexity, and floodplain connectivity of the Yankee Fork Salmon River, which was historically dredge-mined. The 0.83 mile section of river within the project area was obliterated in the early 1950’s by the Yankee Fork Gold Dredge and has since been unable to recover. Under Phase III, the river will be temporarily shunted into a bypass channel and new sections of river channel that were built during Phase II. The existing river channel will be rehabilitated through channel reconfiguration, 0.29 mile of roughened/stabilized bank, installation of large wood structures (channel structure placement), riffle-run-pool sequences, floodplain features, and landslide simulation. Noxious weed control will occur in treated riparian, floodplain, and upland areas. Riparian plantings will occur along newly constructed banks, with seeding of 0.8 acres of rehabilitated upland areas for erosion and sediment control. 1.8 acre of dredge tailings will be removed (debris removal) from the project site.


At the end of Phase III, the new channel sections from Phase II will be reconnected with the rehabilitated existing river channel and the temporary bypass channel will be obliterated. The outcome of the overall project will be to restore appropriate sinuosity to the currently straightened and simplified channel. The outcomes include additions of stream length, increases in habitat complexity needed for salmonid habitat recovery, and restored hydrologic function of this section of river. The outcome of Phase III, specifically, will be rehabilitation of the existing channel and reconnection to previously constructed new stream channel segments.


Note that this project is multi-year funded from FY17 and FY19.

Project Benefit    


The overall goal of the three-phase Bonanza City Stream & Floodplain Project is to reconstruct this 0.83 mile section of river to repair the damage caused by the historic dredge-mining. Reconstructing the river includes removal of more than 100,000 cubic yards of dredge tailings that currently confine the river to a flume-like channel. The removal of these tailings was accomplished during Phase I. Phase II included building new sections of river channel ‘in the dry’. Phase III of the project rehabilitates existing sections of river. The final goals and objectives for the finished project are for the river to have a level of sinuosity and complexity that more closely resembles the historic conditions that the Yankee Fork chinook salmon and steelhead populations evolved to thrive in. The rehabilitated sections of channel will have pools for rearing juvenile salmonids, glides for spawning

adults, slower water velocities that are more suitable for all age-classes, and complexes of large and small wood to restore levels of cover. These critical fish habitat elements are almost completely lacking in the existing river channel. The final objective of Phase III is to initiate revegetation of the of the project area’s riparian areas, uplands, and floodplains.

Accomplishments

Metric Completed Originally
Proposed
Instream Habitat
  Stream Miles Treated .72
Riparian Habitat
  Stream Miles Treated .82
  Acres Treated 2.4
Upland Habitat
  Acres Treated .8

Funding Details

SourceFunds
PCSRF$602,638
Other$219,989
Report Total:$822,627


Project Map



Worksites

WS-1    


  • Worksite Identifier: WS-1
  • Start Date: 03/01/2020
  • End Date: 12/31/2021
Area Description
Bonanza City Stream & Floodplain Project Phase III

Location Information

  • Basin: Salmon
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: Idaho
  • Recovery Domain: Interior Columbia
  • Latitude: 44.370133
  • Longitude: -114.726075

ESU

  • Snake River Basin Steelhead DPS
  • Snake River Spring/Summer-run Chinook Salmon ESU

Map

Photos

Metrics

Metrics
  • C.0 Salmonid Habitat Restoration and AcquisitionY (Y/N)
    •      . . C.0.a Habitat restoration and acquisition funding .00
    •      . . C.0.b Length of stream treated/protected
    •      . . C.0.c
      Project identified in a Plan or Watershed Assessment
    •      . . C.0.d.1 Project Monitoring (LOV)
    •      . . C.0.d.2 Monitoring Location (LOV)
    •      . . C.4 Instream Habitat ProjectY (Y/N)
      •      . . . . C.4.a Instream Habitat Funding
      •      . . . . C.4.b Total length of instream habitat treated
      •      . . . . C.4.c.1 Channel reconfiguration and connectivityY (Y/N)
        •      . . . . . . C.4.c.2 Type of change to channel configuration and connectivity (LOV)
        •      . . . . . . C.4.c.3 Miles of stream treated for channel reconfiguration and connectivity
        •      . . . . . . C.4.c.4 Miles of off-channel stream created through channel reconfiguration and connectivity
        •      . . . . . . C.4.c.5 Acres of off-channel or floodplain connected through channel reconfiguration and connectivity
        •      . . . . . . C.4.c.6 Instream pools created/added through channel reconfiguration and connectivity
      •      . . . . C.4.d.1 Channel structure placementY (Y/N)
        •      . . . . . . C.4.d.2 Material used for channel structure (LOV)
        •      . . . . . . C.4.d.3 Miles of stream treated through channel structure placement
        •      . . . . . . C.4.d.5 Pools expected to be created through channel structure placement
        •      . . . . . . C.4.d.6 Yards of average stream-width at mid-point of channel structure placement project (Yards)
        •      . . . . . . C.4.d.7 Number of structures placed in channel
      •      . . . . C.4.e.1 Streambank stabilization Y (Y/N)
        •      . . . . . . C.4.e.2 Material Used For Streambank Stabilization (LOV)
        •      . . . . . . C.4.e.3 Miles of streambank stabilized
      •      . . C.5 Riparian Habitat ProjectY (Y/N)
        •      . . . . C.5.a Riparian Habitat Funding
        •      . . . . C.5.b.1 Total riparian miles streambank treated
        •      . . . . C.5.b.2 Total Riparian Acres Treated
        •      . . . . C.5.c.1 Riparian plantingY (Y/N)
          •      . . . . . . C.5.c.2
            Species of plants planted in riparian
          •      . . . . . . C.5.c.3 Acres planted in riparian
          •      . . . . . . C.5.c.4 Miles of streambank treated with riparian planting
        •      . . . . C.5.h.1 Riparian plant removal/controlY (Y/N)
          •      . . . . . . C.5.h.2
            Species of plants treated/removed in riparian
          •      . . . . . . C.5.h.3 Acres of riparian treated for plant removal/control
          •      . . . . . . C.5.h.4 Miles of streambank treated for riparian plant removal/control
        •      . . . . C.5.j.1 Debris/structures removalY (Y/N)
          •      . . . . . . C.5.j.2 Acres of riparian treated for debris/structures removal
        •      . . C.6 Upland Habitat And Sediment ProjectY (Y/N)
          •      . . . . C.6.a Upland Habitat / Sediment Funding
          •      . . . . C.6.b.1 Acres of upland habitat area treated
          •      . . . . C.6.b.2 Miles of road treated in upland area
          •      . . . . C.6.b.3 Cubic yards (to nearest yard) of sediment prevented from entering stream (Cubic yards)
          •      . . . . C.6.f.1 Planting for erosion and sediment controlY (Y/N)
            •      . . . . . . C.6.f.2
              Species of plants planted for erosion and sediment control
            •      . . . . . . C.6.f.3 Acres planted for erosion and sediment control
          •      . . . . C.6.h.1 Upland vegetation managementY (Y/N)
            •      . . . . . . C.6.h.2
              Species of plants in upland vegetation management
            •      . . . . . . C.6.h.3 Acres treated for upland vegetation management