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Sample Design: WDFW Adult Enumeration: Weir Operation for Asotin & Tucannon Steelhead populations - Washington Department of Fish and Wildlife (WDFW)
  • ID: 3545
  • State: Finalized
  • Owner: Ethan Crawford
  • Spatial Design Category: Ease of Access
  • Sites in Design: 5
  • Has Location Privacy: No
  • Data Repository: PTAGIS Website (See Sample Design Overview for full list)

The details of this Sample Design, including all the parameters used to generate it, are included below. Sample designs must belong to a Study Plan.


Asotin and Tucannon steelhead are sole populations within the Lower Snake River Major Population Group (MPG).  Both populations include steelhead using small Snake River tributaries that have little or no fish monitoring.  We may conduct adult steelhead sampling operations (active and/or passive) in Pataha (trib to Tucannon), Alkali Flat, Deadman, and Penawawa Creeks (independent Snake River tributaries; Tucannon steelhead population) and Almota Creek (Snake River tributary; Asotin Population).  All of these tributaries are considered mSAs. Our adult monitoring opportunities are often limited by access via private landowners, and we may not be able to rotate trapping operations among tributaries as previously proposed.  

Adult enumeration will allow for the collection of critical data needed to assess stock status and productivity (e.g. run size, timing, age composition, sex ratios, etc.).  Adult escapement data will be used as a primary means of monitoring for VSP levels as recommended by NOAA and the Salmon Recovery Plan for SE WA, etc.  We will use the results from these adult enumeration sites in conjunction with results from spawning surveys and other escapement data collected for other portions of the Asotin and Tucannon populations to describe fish abundance, escapement, distribution, and productivity at the population level.  Adult enumeration will be used to assess stock status and aid in full population level run reconstruction estimates.



Start Year


End Year


Study Plan

Estimate Adult Steelhead Abundance Using Weirs in Small Streams Associated with Tucannon & Asotin Populations (2010-028-00) v1.0 v1.0

Data Repositories





Area of Inference


AOI Notes


Sample Sites
These are the unique sites that are participating in this sample design over the time period covered by the design.

Map of Sites


Sampling Schedule
This section describes which sites are scheduled to be sampled in any given year, and (if applicable) the panel and stratum that the sample site belongs to.

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Relevant acts include the Organic Act, 43 U.S.C. 31 et seq., 1879; Fish and Wildlife Coordination Act, 1934; Fish and Wildlife Act, 1956; Migratory Bird Treaty Act, 1918; Migratory Bird Conservation Act, 1900; Federal Land Policy and Management Act, 1976; Fish and Wildlife Improvement Act, 1978; Endangered Species Act, 1973; Marine Mammal Protection Act, 1972; Great Lakes Fishery Act, 1956; Nonindigenous Aquatic Nuisance Prevention and Control Act, 1990; Water Resources Development Act, 1990; and other authorizations conveyed to the U.S. Geological Survey.

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