Water quality and discharge data from selected sites in the Fortymile and Tolovana drainages, summer 1987
Mack SF, Moorman MA, Harris L. 1987. Water quality and discharge data from selected sites in the Fortymile and Tolovana drainages, summer 1987. Alaska Division of Geological And Geophysical Surveys. Fairbanks, AK
Alaska Division of Geological and Geophysical Surveys investigators and cooperators collected samples for water quality analyses, measured discharges, and observed water levels at selected sites in the Fortymile and Tolovana River drainages to assist the U.S. Bureau of Land Management (BLM) complete environmental impact statements on the cumulative impacts of placer mining in those drainages. In the Fortymile drainage at all sites with ten or more observations, turbidity averaged less than four NTU's for the field season. No primary maximum contaminant concentrations established by the Alaska Department of Environmental Conservation were exceeded in the samples examined for dissolved constituents. For the samples examined for total recoverable constituents, the maximum contaminant concentration for chromium was exceeded at Walker Fork above the South Fork and at the West Fork Dennison sites, and for mercury at the South Fork at Taylor Highway Bridge site. In the Tolovana drainage average turbidity was higher, ranging from 10 to 27 NTU's for the field season. Water chemistry done in 1986 by the Alaska Department of Environmental Conservation showed primary maximum contaminant concentrations for arsenic and cadmium exceeded at one site on Livengood Creek. The complete data from this summer are included in appendices attached to the report.
- Type
- Unpublished Report
- Authors
- Mack, Stephen; Moorman, Mary; Harris, Linda
- Date of Issue
- 1987-12
- Publisher
- Alaska Division of Geological And Geophysical Surveys
- Units
- YUCH
- Keywords
- Contaminants, Cumulative Effects, Environmental Impacts, Fortymile River, Hydrology, land use (mining), Subarctic, Taiga, Tolovana River, Water - Hydrology, Water Quality