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Flow and water quality measurements are taken at all three sedimentation <br />ponds, in accordance with the Colorado Discharge Permit System permit <br />issued by the Colorado Department of Public Health and Environment, <br />Water Quality Control Division. <br />The permit application contains provisions for ongoing surface water <br />monitoring. The water monitoring plan is detailed in Tab 15. <br />F. Probable Hydrologic Consequences <br />A determination of the probable hydrologic consequences of the mining and <br />reclamation activities at the Seneca II-W Mine site has been made by the <br />applicant and is found in Tab 17 of the permit application. This section <br />includes an evaluation of quantity and quality effects on ground and surface <br />water systems and mitigative measures to be taken both during and after <br />mining. <br />The Probable Hydrologic Consequences section of this document is divided <br />into two main subsections: Ground Water Effects and Surface Water <br />Effects. <br />Ground Water Effects <br />Probable hydrologic consequences to the ground water regime will be minor. <br />Localized effects to the hydrologic system will include: <br />1) the drawdown of ground water, due to pit dewatering, for a few <br />hundred to perhaps 1,000 feet from the pit; <br />2) possibly diminished quantity and quality of water in the Temple Well <br />no. 1; and <br />3) the probable dewatering and degradation of quality in three to five <br />springs in the permit area, two of which are used for stock watering <br />purposes; <br />4) the possible increase in water and decrease in quality of alluvial water <br />in Hubberson Gulch and its unnamed tributary along the access road, <br />due to infiltration of spoils discharge; <br />5) the establishment of a relatively unconfined aquifer of poor quality in <br />the backfilled pits. A discussion of the potential impacts follows; <br />During mining, inflows may be expected to develop from perched aquifers <br />within the Williams Fork overburden, from a limited Williams Fork <br />overburden aquifer, and from the Wadge coal aquifer. Coal removal is by <br />an updip strip method. As a general rule, more water will be encountered <br />25 <br />