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Geology and Ground-Water Hydrology of Spirit Lake Blockage, Mount St. Helens, Washington, with Implications for Lake Retention

Description: The following report follows the geological and ground-water hydrology study of the Spirit Lake blockage in Mount St. Helens that took place after a rockslide-debris avalanche in May 18, 1980.
Date: 1989
Creator: Glicken, Harry; Meyer, William & Sabol, Martha
Partner: UNT Libraries Government Documents Department
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Developing a Predation Index and Evaluating Ways to Reduce Salmonid Losses to Predation in the Columbia River Basin, Annual Progress Report August 1988-September 1989.

Description: We are reporting progress on the predator-prey study for the period August 28, 1988 to September 1, 1989. The purpose of this research is to evaluate the feasibility of an index for assessment of predation in various reservoirs throughout the Columbia River basin, to describe the relationships among predator-caused mortality of smolts and physical and biological variables; to examine the feasibility of developing bounty, commercial or recreational fisheries on northern squawfish (Ptychocheilus … more
Date: December 1989
Creator: Nigro, Anthony A.
Partner: UNT Libraries Government Documents Department
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