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It should be recognized that springs and seeps may in same • instances enhance the diversity of the reclamation by providing areas conducive to the establishment of a different vegetative type. If it is determined that further action is needed to mitigate the adverse effects of a spring or seep, a site specific mitigation plan will be developed and implemented. At this time it is difficult to predict the unknown effects of springs and seeps. However, a generic mitigation plan could possibly involve one or more of the following: ditching to consolidate flows, containment of flows, directing flows to sediment ponds and possible treatment of discharges, etc. The Division will be notified of springs or seeps requiring further mitigation and the resulting mitigation plan to be implemented. DIVISION CONCERNS "Colowyo Coal will revise the Probable Hydrologic Consequences (PHC) section to address spoils spring development. The predictions will be based on projections made by CYCC and the BLM. Spoils hydrograph predictions will not be included, but general estimates of base and peak flows will be submitted." (Excerpted from the Preliminary Adequacy Review, Permit Renewal For The Hayden Gulch Mine, File No. C-80-003, October, 30, 1986.) • RESPONSE Location of Spoil Springs As a general rule the location of spoil springs have already occurred in the locations where spoil springs would have been expected to occur. ~Rbe- . NW ~ `r/le' Prior to mining, Seep Sp4 was noted as having received its water P~~^ ~'~'~ supply from one of the coal sequences to be mined and would dry up during P'~' the life of the mine. It was anticipated that upon backfilling and ~nt`!,a~i~ reclamation, the SP4 discharges would return to normal or to slightly ,~ty.y~^cly~~ higher than normal. The following table summarizes the quality of the sxe~4'< rlo5 water from the spring prior to mining and during mining with partial reclamation completed. ~,~ dv$ Revised November, 1986 I1