Summary Description: Assess losses of resident fishery at Dworshak Dam. Study rainbow trout and smallmouth bass. Gather physical & biological data for M&E; of impacts from Dworshak operations. Apply data to formulate biological/integrated rule curves. See also 8709900.

Background: The study is designed to assess the impacts of the original construction and current operation of Dworshak Dam on the resident fishery, speecifically rainbow trout and smallmouth bass. This project functions in conjunction with 8709900.

Milestones: The Nez Perce identified critical uncertainties in managing this fishery. Continued study designs to assess population, and age and growth determinations of resident fishery at Dworshak reservoir. C-14 and primary productivity studies were also undertaken. Assisted EIS on resident fish work group of Systems Operation Review (SOR). Continued monthly creel census, food studies, fish population samplings, and age and growth determinations.Obtained current data base for fish stocks (rainbow trout, smallmouth bass, and forage species) in Dworshak Reservoir. Formulation of protection, mitigation, and enhancement opportunities for these fish stocks; Established food habits of rainbow trout, population dynamics and habitat preferences of smallmouth bass, and the status of other forage species. Electrofishing in selected areas to augment population data of rainbow trout, smallmouth bass, and forage species. Assess status of forage species such as redside shiners and crayfish. Analyze data to determine impacts of reservoir operation on smallmouth bass. Contract 1987BI35165 was completed and closed 1998. Work on this project was transferred to Master Contract 1997AM30423 task order 1997AT34029.

Results: The results of this study and that of BPA Project 8709900, including fishery management recommendations, were combined in a comprehensive reservoir management plan in 1991.

Publications:

Publication Title	Report Type	Coverage Years	Published	Pages	DOE/BP Number
Dworshak Dam Impact Assessment and Fishery Investigation and Trout, Bass, and Forage Species	Summary	1987 - 1991	Oct 1992		35165-4 R 082
Dworshak Reservoir Investigations Trout, Bass, and Forage Species	Annual	1989 - 1989	Jul 1990		35165-3 R 061
Dworshak Reservoir Investigations Trout, Bass, and Forage Species	Annual	1988 - 1988	Jul 1989		35165-2 R 053
Dworshak Reservoir Investigations Trout, Bass, and Forage Species	Annual	1987 - 1987	May 1988		35165-1 R 041

Project Classification Keys:
Primary: All projects in the Resident Fish Program
Secondary: Research, evaluation, and studies
Tertiary: Development and testing of Models

Work Sites

Site/Subsite Names	Site Type	Types of Work Performed
DWORSHAK RESERVOIR/	Reservoir (incl. lakes, ponds,etc.)	Survey, study, research, monitor, evaluate
OROFINO/NEZ PERCE TRIBE	Office (business, hdqtrs, university)	Survey, study, research, monitor, evaluate

Project Budget and Obligation:

Fiscal Year	Initially Authorized	Latest Authorized	Authorized Change	Obligation In Process	Bonneville Overhead	Contracted Obligation	Contracted Agent
1987	$111,517	$0	$-111,517	$0	$0	$111,517	NEZ PERCE TRIBE
1988	$109,783	$115,000	$5,217	$0	$0	$109,783	NEZ PERCE TRIBE
1989	$115,000	$145,829	$30,829	$0	$0	$145,829	NEZ PERCE TRIBE
1990	$115,000	$106,593	$-8,407	$0	$0	$106,593	NEZ PERCE TRIBE
1994	$0	$323,565	$323,565	$0	$0	$159,969	NEZ PERCE TRIBE
1995	$0	$0	$0	$0	$0	$10,000	NEZ PERCE TRIBE
1996	$181,000	$172,554	$-8,446	$0	$0	$172,554	NEZ PERCE TRIBE
1997	$143,400	$143,392	$-8	$0	$0	$143,392	NEZ PERCE TRIBE
1998	$175,000	$174,677	$-323	$0	$0	$174,677	NEZ PERCE TRIBE
Totals:	$950,700	$1,181,610	$230,910	$0	$0	$1,134,314	.