
Last June, Portland General Electric released a comprehensive, multiyear water quality study of Lake Billy Chinook, the rivers that supply it, and the lower Deschutes River into which water is released. Among other things, the report showed that the Crooked River contains significant amounts of pollution. This pollution combined with sunlight generates suspended algae on the surface of Lake Billy Chinook which is subsequently released into Lake Simtutus and then the lower Deschutes River. Algae blooms are increasing in occurrence, leading the Oregon Health Authority to warn last June that “harmful algae blooms” could “routinely develop in the lake”.
One of the shortcomings in the Habitat Conservation Plan is lack of adequate consideration for water quality. Clearly, high temperatures and pollution can have adverse impacts on fish and the aquatic environment, including mortality (“take”). Irrigation return flows are “covered activities” but the HCP does not adequately examine impacts on water quality from agricultural runoff or provide for minimum standards in covered waterways.Read More »
Three federal agencies (Bureau of Reclamation, National Marine Fisheries Service, and US Fish & Wildlife) manage water releases out of Prineville Reservoir into the Crooked River. As of last week, they believe flows for fish and wildlife can be maintained through the winter. Prineville Reservoir has a capacity of 148,640 acre feet of water, approximately half of which is guaranteed for irrigation. Water in excess of that at the beginning of irrigation season is “fish water” to be released for the “maximum biological benefit” for fish and wildlife. Irrigation season ends in a month and Prineville Reservoir is still 66% full, leaving plenty of fish water to release during the winter. Keep reading for more details.


