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Technical Revision No. 79 -PAR Responses 11 Apri/ /8, 1997 Page 46. MCC will begin monitoring the springs in the RPE area. The springs are located in azeas where sufficient data can be obtained prior to impacting them with the RPE. 47. The Division's question inquires about stream buffer zones in the vicinity of the RPE, mine entrance and North Soil Storage area. MCC has prepazed a drawing to be inserted into Appendix M of Exhibit 70. As shown on the enclosed Wright Water Engineers drawing, the riparian area in Sylvester Gulch is limited to the azea immediately adjacent to the stream. RPE road -While the entire RPE haul road will be within 100 feet of Sylvester Gulch, there is only a small portion of the road that will effect riparian vegetation. This portion is the stream crossing. As MCC will restore the original stream channel when the crossing (culvert and fill material) is removed. The water quantity and quality of Sylvester Gulch will not be adversely affected, because temporary erosion control measures will be utilized during construction of the crossing, and the outslopes will be protected by vegetation. Riparian vegetation will also be reestablished in the azea where riparian vegetation had been disturbed. MCC will utilize the plan as discussed in the discussion entitled "Riparian Areas" in the mining and reclamation plan. Mine entrance -Please note that the mine entrance is an existing entrance, MCC is only proposing to widen the entrance. Figure 2.0 shows that the outside edge of the widened entrance is more than 100 feet from Sylvester Gulch; therefore, not within the stream buffer zone. RPE sedimentation pond -All of the sediment control figures in Appendix B show that State Highway 133 is between the RPE pond and the North Fork of the Gunnison River and is approximately 200 feet from the river; therefore, is not within the stream buffer zone. North Soi/Storage Area -While the North Soil Storage Area is within 100 linear feet of the North Fork of the Gunnison River, it is approximately 35 feet above the elevation of the river. The slope from the North Soil Storage Area to the river is approximately 100 feet. The construction of the North Soil Storage Area will not effect the stream channel, MCC will protect the water quality and quantity, and it is not appropriate to plant riparian vegetation upon reclamation as the baseline survey documented the lack of riparian vegetation. RPE - As shown on the Stream Buffer Zone figure, a portion of the RPE is located within 100 feet of Sylvester Gulch. As stated previously, riparian vegetation is limited to the channel itself; therefore, reclaiming the area with riparian vegetation is not appropriate. MCC will not disturb the stream channel and the quality and quantity of water will not be impacted because all surface runoff flows to the RPE pond and dischazged to the North Fork. 48. The USGS gaging station on the North Fork of the Gunnison River is above the RPE.