WRIA 32 Steelhead
Data
Population Info
This figure illustrates Summer steelhead trapped at the WDFW fish trap on the Touchet River in the City of Dayton, WA. The figure represents the total number of adult steelhead trapped beginning in 2000-to present. Natural fish are wild native steelhead, hatchery fish are fish from the Lyons Ferry hatchery on the Snake River, and hatchery endemic fish which are derived from wild eggs taken from the Touchet River natural population and raised in the WDFW Snake River Lab hatchery located in Dayton. It is important to note that fish numbers provided in this figure are a partial count of the total number of fish in the Touchet River, because under some conditions fish are able to pass the trap undetected and some fish spawn in the main river or in tributaries below the trap where they are not counted.
Note: The bars provided for 2010 is preliminary in-season counts.
Touchet River Summer Steelhead population estimate based on adult steelhead return counts at the WDFW Dayton fish trap. Population estimates are partial estimates for the Touchet River above the Dayton fish trap. Adult steelhead returning to tributaries downstream of the trap or spawning downstream of the trap are not included in this estimate. The recovery goal for adult steelhead in the Touchet River is 1000 adult natural fish returning to the spawning grounds. The recovery goal must be met or exceeded on 8 consecutive years for the Touchet population to be delisted.
The Touchet River natural steelhead population is comprised of the main stem Touchet, it's 3 forks (North Fork, South Fork and Wolf Fork), Coppei Creek, Whiskey Creek and Patit Creek. The recovery goal for the Touchet Steelhead populationis set at 1000 individuals over an 8 year geometric mean. The recovery goal is set for the entire Touchet drainage while the above graph represents a minimum census for adult steelhead returning to the Touchet River trap and Coppei Creek. Population numbers are counted at fish traps in the main stem Touchet River and also beginning in 2010 Coppei Creek. It is anticipated beginning in 2011 adult counts will begin in Pataha Creek as well. No adult population data is available in other tributaries. Fish tallies in this figure are for natural fish only.
Note: The bars in the above figure are colored to illustrate the origins of the fish and they are stacked to indicate numbers toward recovery.
Data
Population Info
The Walla Walla River Summer Steelhead population includes the Walla Walla River, Mill Creek, Dry Creek, Cotton Wood, Yellowhawk and Pine Creek. The Nursey Bridge Dam on the Walla Walla River near Milton-Freewater, OR (rkm 71.9) provides a natural trapping location where adult steelhead are counted. The counts are considered a partial count for fish passing above the Nursery Bridge Dam to spawn, because under some conditions fish can pass the dam without being seen. The orange bar in the figure above represents a 2010 count for both natural and hatchery steelhead. This estimate will be revised when the percent natural has been tabulated.
Note: This figure was created from a data table modified from the Confederated Tribes of the Umatilla Indian Reservation (CTUIR).
The Walla Walla River natural steelhead population is comprised of the main stem Walla Walla River, its 2 main forks (North and South Forks) and it's tributaries Mill Creek, Cottonwood Creek, Pine Creek, Dry Creek and Yellowhawk Creek. The above graph represents the number of adult steelhead counted at the Nursery Bridge Dam, Bennington Dam on Mill Creek or at the trap on Yellowhawk. Fish counts are not conducted in other tributaries. The data provided is to be considered partial because all trap locations have inefficiencies due to river conditions. In addition steelhead in unknown numbers spawn downstream of the traps and in several unmonitored tributaries.
Note: Data has been modified from the Confederated Tribe of the Umatilla Indian Reservation table 2009.