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_~ . ,r ,.- -2- August 12, 1983 Water quality monitoring should be continued for all alluvial wells (Sylvester Gulch and North Fork of the Gunnison) and wells completed in unconsolidated (colluvial) deposits within the area of surface facilities. Tnis monitoring should be conducted quarterly for the electro-conductivity and temperature. Ground Water Quantity All monitoring wells completed within rock strata, unconsolidated deposits and alluvium snould be monitored monthly. This monitoring snould consist of measurements of water levels. All water level data for each well should be plotted on separate hydro graphs for inclusion in the annual hydrologic reports. Flow rates should oe monitored for all springs and seeps between the Ury Fork of Minnesota Creek and the North Fork of the Gunnison (located on Exnibit 2.8.88 of the application). Flow rates are to be monitored monthly except when snow pack restricts access. Measurements of pH, electro-conductivity and temperature may be dropped for springs and seeps located in the Dr~ Creek Drainage and located above the "F" seam crop line in the North Fork Drainage. The monitoring of spring and seep flows were required 1) to insure an adequate baseline for future permits in the Dry Fork Drainage 2) to quantify the impacts of mining in the North Fork drainage and 3) to detect any unforeseen impacts to springs and seeps in the Dry Fork drainage. Surface Water Quality The monitoring of surface water quality in the Minnesota Creek Basin may be reduced to monthly monitoring of field parameters of pH, electro-conductivity and temperature. Quarterly laboratory analyses of surface waters in the rlinnesota Creek basin are not necessary, given that no surface facilities (i.e. entries, escape ways, ventilation shafts, mine roads, etc.) are presently located in or planned for construction in this drainage basin. Surface water quality samples should still be collected and analyzed for the reduced parameter list (Attachment A) at the following stations: North Fork above Mine, North Fork oelow Mine, and Sylvester Gulch (quarterly). Surface Water Quantity Continuous recordings of stream flows should be continued at all surface water stations. The continuous recording surface water monitoring stations should be maintained and upgraded to improve the collection of stream flows. N good baseline on the Minnesota Creek Basin and effects of mining on surface water flow will be critical in future permitting.