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Edna Mine. Ten trace elements were studied and only manganese and selenium were
<br />• found to exceed the Public Health Service drinking water standards a significant
<br />number of Times. The most consistent change in water quality was the ubiquitous
<br />increase in total dissolved solids. The quantitative impacts relative to the dissolved
<br />solids are discussed in detail in Section 2.5.
<br />Skogerboe, et al., 1979, studied The quality of surface and subsurface drainage
<br />from the Edna Mine. They found no detectable impact on Trout Creek with respect
<br />to AI, As, Cd, Cr, Cu, Fe, Pb and Zn. However, they did infer that significant
<br />increases in Mn and Se could occur, but further stated that these increases are not
<br />of sufficient magnitude to impact the aquatic biota. The sampling of aquatic life
<br />found in Section 2.7 confirms that no noticeable impact occurs.
<br />In The course of our study, we have collected and analyzed 24 grab samples from
<br />Trout Creek. fn comparing the analyses to the National Academies of Science and
<br />Engineering, Water Quality Criteria for Human Consumption or Marine Life, it was
<br />found that none of the analyses for boron or selenium exceeded the standards, but
<br />that 15 of the 24 analyses exceeded the manganese standard. The manganese
<br />standard is not based on toxicity, but rather on undesirable qualities of taste.
<br />• 2.2.3 METHODS
<br />2.2.3.1 Existing Information
<br />REFERENCES C{TED
<br />Hounslow, A., J. Fitzpatrick, L. Cerillo and M. Freeland, 1978, Overburden Miner-
<br />alogy as Related to Ground-Water Chemical Changes in Coal Strip Mining:
<br />U.S. Envir. Protect. Agency, Rpt. EPA-60017-78-156, 299 p.
<br />McWhorter, D. B., J. W. Rowe, M. W. VanLiew, R. L. Chandler, R. K. Skogerboe,
<br />D. K. Sunada and G. V. Skogerboe, 1979, Surface and Subsurface Water Quality
<br />Hydrology in Surface Mined Watersheds. Office of Research and Development,
<br />U.S.E.P.A., Cincinnati, Ohio, EPA-600/7-79-193A.
<br />Moron, S. R., G. H. Groenewold and J. A. Cherry, 1978, Geologic, Hydrologic,
<br />and Geochemical Concepts and Techniques in Overburden Characterization
<br />for Mined-Land Reclamation: North Dakota Geological Svrvey, Rpt. 63,
<br />152 p.
<br />Skogerboe, R. K., C. S. Lavallee, M. M. Miller and D. L. Dick, 1979, Environmental
<br />Effects of Western Coal Surface Mining: Part III -The Water Quality of
<br />• Trout Creek, Colorado: U.S. Envir. Protect. Agency, Rpt. EPA-600/3-79-008,
<br />57 p.
<br />2.2-6
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