Times When Spawning Or Incubating Salmonids Are Least Likely to Be Within Washington State Freshwaters
Washington Department of Fish and Wildlife TIMES WHEN SPAWNING OR INCUBATING SALMONIDS ARE LEAST LIKELY TO BE WITHIN WASHINGTON STATE FRESHWATERS June 1, 2018 Page 1 Washington Department of Fish and Wildlife (WDFW) biologists will use this table as a starting point when they consider timing restrictions for any hydraulic project for which they will issue a written HPA. WDFW developed this table based on the general conditions and fish life histories present within broad reaches of stream or sub- basins. Based on the site-specific conditions, circumstances, work proposed, and fish life stages present, timing restrictions for individual hydraulic project sites may differ from those upon which this table was based; therefore alternative work times may be appropriate for some projects. The table identifies times when salmonid eggs and fry are least likely to be incubating within stream gravels. In the case of some large streams, such as the Columbia and Snake Rivers, outmigration timing of smolts was also considered. Check the listing for the county in which in-water work will occur to identify times that may avoid impact to spawning and incubating fish life. Biologists will also consider such things as the expected impact of construction activities, equipment type and access, life history stages of all species of fish life present, presence or absence of spawning habitat and incubating fish at or near the project site, weather (heavy rain, snow, frozen soils), work site containment, wastewater management, best management practices proposed by the project proponent, mitigation measures volunteered or imposed upon the project, and other circumstances and conditions when permitting in-water work.
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