Columbia Basin Fish and Wildlife Program Columbia Basin Fish and Wildlife Program
SOW Report
Contract 51686: 2007-003-00 EXP DWORSHAK DAM RESIDENT FISH MITIGATION
Project Number:
Title:
Dworshak Dam Resident Fish Mitigation
BPA PM:
Stage:
Closed
Area:
Province Subbasin %
Mountain Snake Clearwater 100.00%
Contract Number:
51686
Contract Title:
2007-003-00 EXP DWORSHAK DAM RESIDENT FISH MITIGATION
Contract Continuation:
Previous: Next:
46350: 2007-003-00 EXP DWORSHAK DAM RESIDENT FISH MITIGATION
  • 56059: 2007-003-00 EXP DWORSHAK DAM RESIDENT FISH MITIGATION
Contract Status:
History
Contract Description:
Contract Description:

This contracting period represents the fourth year of a nutrient supplementation project on Dworshak Reservoir.  This project is a joint venture between the U.S. Army Corps of Engineers (USACE) and the Idaho Department of Fish and Game (IDFG).  The USACE will supplement the reservoir with nitrogen to promote an improved nitrogen to phosphorus  ratio and increased foodweb efficiency.  The IDFG will be responsible for collecting limnological samples, which will be used for in-season management of nutrient supplementation and for evaluating project effectiveness.  The USACE has contracted TG-Ecologic to interpret the results of limnological sampling for recommending in-season adjustments to the amount of fertilizer to be applied.  Fish monitoring will also be conducted by the IDFG and, combined with limnological data, will allow for an overall assessment of project effectiveness.

Both limnological and fish sampling during this contracting period will be similar to the last contracting period.  During the last contracting period, sampling was scaled down somewhat, including less sampling of the hypolimnion and eliminating zooplankton sampling below 10 meters.  This sampling scheme has provided adequate data to address the goals of the project.  Limnological sampling will be further evaluated to determine how much it can be scaled back as the project transitions from an experimental phase to an operations phase.  Future changes to the sampling scheme will focus on key parameters to be monitored and times of year which prove to be most useful in actively managing the nutrient applications.  We will also seek input in adjusting the sampling scheme to improve monitoring of downstream water quality.

The project has progressed well during the first three seasons.  Nitrogen supplementation has resulted in increased densities of picoplankton and edible plankton.  Although kokanee were not necessarily longer than typically expected during years of similar densities (although this analysis is preliminary), they were considerably heavier.  This has lead to positive feedback from anglers despite lower than average kokanee abundance.  While undesired blooms of inedible diatoms and blue-green algae did occur, we gained greater understanding of how the reservoir responds to nutrient supplementation.  We expect effects of the supplementation to be incremental, with benefits seen at a higher trophic level in each subsequent year.  With this in mind, any noticeable benefits to the kokanee population this early in the project should be viewed as encouraging.  We expect a high density of adult kokanee during this contracting period, which will allow us to evaluate kokanee growth for a wide range of fish densities since the supplementation project began. A thorough analysis of the effects of supplementation is underway and will be included in future reports.
Account Type(s):
Expense
Contract Start Date:
03/01/2011
Contract End Date:
02/29/2012
Current Contract Value:
$212,318
Expenditures:
$212,318

* Expenditures data includes accruals and are based on data through 31-Aug-2021.

Env. Compliance Lead:
Work Order Task(s):
Contract Type:
Contract (IGC)
Pricing Method:
Cost Reimbursement (CNF)
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Viewing of Work Statement Elements

Deliverable Title WSE Sort Letter, Number, Title Start End Complete
BPA Environmental Compliance A: 165. BPA Environmental Compliance 03/11/2011 03/11/2011
Collection of reservoir limnology data B: 157. Collect reservoir limnology data 11/18/2011 11/09/2011
Analyze and interpret limnological data C: 162. Analyze and interpret limnological data 02/28/2012 02/28/2012
Conduct hydroacoustic survey D: 157. Conduct hydroacoustic survey 07/31/2011 07/29/2011
Conduct mid-water trawl surveys E: 157. Conduct mid-water trawl surveys 10/31/2011 10/26/2011
Survey kokanee spawners F: 157. Survey kokanee spawners 09/30/2011 09/23/2011
Analyze and interpret kokanee population data G: 162. Analyze and interpret kokanee population data 02/28/2012 02/28/2012
Present project results and findings H: 161. Present project results and findings 02/28/2012 10/28/2011
Manage project data I: 160. Manage project data 02/28/2012 02/28/2012
FY 11 SOW package and accrual estimate J: 119. Manage and Administer Projects 02/28/2012 01/06/2012
Final FY 10 annual report attached to this contract K: 132. Produce Annual Report for the period 3/1/10 - 2/28/11 01/31/2012

Viewing of Implementation Metrics
Viewing of Environmental Metrics Customize

Primary Focal Species Work Statement Elements
Kokanee (Oncorhynchus nerka)
  • 4 instances of WE 157 Collect/Generate/Validate Field and Lab Data
  • 1 instance of WE 161 Disseminate Raw/Summary Data and Results
  • 2 instances of WE 162 Analyze/Interpret Data

Sort WE ID WE Title NEPA NOAA USFWS NHPA Has Provisions Inadvertent Discovery Completed
A 165 BPA Environmental Compliance 03/01/2011
B 157 Collect reservoir limnology data 03/01/2011
C 162 Analyze and interpret limnological data 03/01/2011
D 157 Conduct hydroacoustic survey 03/01/2011
E 157 Conduct mid-water trawl surveys 03/01/2011
F 157 Survey kokanee spawners 03/01/2011
G 162 Analyze and interpret kokanee population data 03/01/2011
H 161 Present project results and findings 03/01/2011
I 160 Manage project data 03/01/2011
J 119 Manage and Administer Projects 03/01/2011
K 132 Produce Annual Report for the period 3/1/10 - 2/28/11 03/01/2011
L 185 Periodic Status Reports for BPA 03/01/2011