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When ground and surface monitoring resume, the applicant will conduct an annual spoil spring survey that will presumably support these projections. Any springs with dischazge of at least 10 GPM will be identified and sampled for a full suite of parameters, with a report to be submitted to the Division by June 15 of each year. The applicant has also committed to replacement of any adjudicated source of water that may be impacted by the proposed mining operation, as would be required by Colorado water law. b. Surface Water The probable hydrologic consequences resulting from the mining activities to surface water at the Hamilton Mine permit area will result from alterations to runoff characteristics, surface configuration, and water quality. Total dissolved solids (TDS) for Naturita Creek, vary from 900 to 1,750 mg/I, and aze much higher than for the San Miguel River, which has a weighted average TDS of 316 mg/1. According to data provided by Honeywood Coal Company, sulfates vary from 500 to 963 mg/1 in Naturita Creek water, whereas San Miguel River water generally has less than 100 mg/1. Levels of calcium, magnesium and potassium aze also higher in Naturita Creek than in the San Miguel River. Naturita Creek is suitable for livestock use. To date, mining activities have not contributed to changes in water quality parameters of either of these streams since there have been no recorded flows from the minesite. Total suspended solids (TSS) is still expected to decrease as a result of interception of water by sediment ponds. Total salt loading is still expected to increase somewhat due to exposure of materials not previously in contact with surface water, breakup of overburden by mining activities and concentration due to evaporation of water during retention in sediment ponds. Samples taken during runoff resulting from 1988 snowmelt and storm events along Long, Center, Section 33 and Hamilton (referred to as Broad Creek in the permit application) Creeks show variability in TDS from 5,080 mgA on upper Hamilton Creek following a storm, to 110 mg/1 on Upper Center Creek following snowmelt. Sulfates vaned from 3,680 mg/1 on Upper Hamilton Creek during the same storm event to 110 mg/1 on Upper Center Creek during the same snowmelt runoff sampling. No runoff from the disturbed area is expected during dry periods or during minor precipitation and snowmelt events, due to high surface infiltration rates, evaporation and interception of minor runoff by sediment ponds. There is very little contribution of flow to Naturita Creek from the permit area drainage. While flow in Naturita Creek does increase from above the permit area to its confluence with the San Miguel, the increase appeazs to be due primarily to irrigation return flow and minor subsurface flow. Except during significant snowmelt and storm events, there appeazs to be insufficient runoff to allow flow in the draws across the proposed permit azea. In those raze instances where runoff does develop, little water actually reaches Naturita Creek. For example, an October 2-3, 1988 storm event contributed to flow in all draws across the permit area, yet 15