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2.05 APPLICATION FOR PERMIT FOR SURFACE OR UNDERGROUND ACTIVITIES -- <br />MINIMUM REQUIREMENTS FOR OPERATION AND RECLAMATION PLANS. <br />2.05.6 Mitigation of Surface Coal Mining Operation Impacts. (Cont'd.) <br />(3) (b) (ii) (Cont'd.) <br />Baseline Hydrology Monitoring Program- Permit and Adiacent Areas <br />In 1982 and 1983, the Operator instituted a hydrology monitoring program to obtain baseline <br />information on several representative springs, ponds, streams, and groundwater wells. Several <br />water resources from each of the five drainages within or adjacent to the permit area were chosen <br />for monthly monitoring (see Volume 4, Map No. 41). These water resources, springs 16 through <br />31, ponds 81 through 90, stream monitoring stations SWA through SW -12, and groundwater <br />monitoring wells DH -58, DH -60, DH -65, DH -68, DH -70, DH -76, and GR -77, were chosen as <br />representative resources based upon the locale and distribution in the drainages, the use of the <br />water, whether the water resource was an adjudicated water right, perennial discharge, and the site <br />acceptability. This past water monitoring program is discussed in the following sections. <br />The list of monitoring stations above is not complete. Please refer to the monitoring site tables in <br />Volume 4 and Map 4-1 for a complete listing. <br />In discussions between the Operator, DMRS, and the BLM in Montrose, the involved parties <br />concluded that an emphasis should be given to the hydrologic monitoring within the area to be <br />. impacted by the mining in the next five years and adjudicated water rights within the permit area. As <br />a result of past higher production rates, a majority of the permit area was included by the Operator in <br />the five -year mine plan area. The current projection of the five -year mine plan encompasses a <br />much smaller portion of the permit area and hydrologic monitoring is now limited to the latest <br />projected five -year mine plan area and additional areas which have recently been mined. <br />Past Surface Water Monitoring - Permit and Adjacent Area <br />The Operator divided the surface water monitoring requirements into streamflow monitoring and <br />pond monitoring. <br />The Operator installed and monitored eight continuously recording stream monitoring stations in the <br />Stevens Gulch, East Roatcap Creek, Main Roatcap Creek, and Terror Creek drainages. In 1982, <br />the Operator retained Watec, Inc. of Aurora, Colorado, to calculate flume sizings and install stream <br />gauges SW -1, SW -2, SW -5, and SW -6. Piteau and Associates of Golden, Colorado, installed <br />stream gauges SW -9, SW -10, SW -11, and SW -12 in 1983. Most of these stations consist of a <br />Parshall flume, a stilling well, and a 32 -day Steven's type "F" recorder. The monitoring <br />n <br />-116- <br />08/10 <br />PR-04 <br />