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Rechazge capacity is expected to increase. The potential infiltration rate will increase due <br />to the increased porosity of the backfilled overburden and soil in the pit area. Recharge is <br />expected to fill from the pit bottom above the Pictured Cliffs Sandstone aquitazd to the <br />water-bearing zones which will accept the water and transmit it down dip and laterally to <br />the assumed sink, the Animas River. The water is moving primarily through fractures in <br />the coal along the 21 to 28 degree down dip. The grade, laterally, of the Pictured Cliffs <br />Sandstone is only about four degrees from the pit azea to its outcrop neaz the confluence <br />of Carbon Junction Canyon and the Animas River. The outcrop sandstone and associated <br />channel bottom aze dry which supports that hypothesis that the sink is occurring <br />downstream where the water-bearing zones intersect the Animas River. Thus, runoffwill <br />decrease and ground water recharge will increase. Once equilibrium is attained, no net <br />change in water quantity reaching the Animas River is expected. <br />Any coal processing waste will, to the extent possible, be placed above the water-bearing <br />zones in the pit; which will minimize the time water will be in direct contact with the <br />processing waste. Based upon ground water quality analyses, overburden analyses and <br />coal reject analyses; no increased adverse effects on long term ground water quality are <br />expected. Revegetation, as planned, will reduce Iong term sedimentation of the disturbed <br />area. No other adverse effects aze expected. <br />Oakridge will conduct a spoils monitoring program as a part of the protection of the <br />hydrologic balance in the reclamation program. The spoils monitoring will begin with <br />spring runoff in 1998, and extend until such time as no discernible change in water <br />character occurs for three consecutive quarters. A single monitoring point will be <br />established at the base of the spoil at the lower end of the underdrain. If there is a water <br />dischazge from this monitoring location, it will be monitored as a spring under the spring <br />and seep survey. Monitoring of the spoil dischazge will occur semi-annually. In the event <br />other springs develop, the spoils monitoring program will be amended to incorporate <br />analysis of these features as necessary. <br />2.05.6(4) Protection of Public Parks and Historic Places <br />There are no public parks or historic places near the mine site. <br />2.05.6(5) Surface Minin¢ Near Under round Minin¢ <br />There are no underground wining activities near this surface mine. <br />2.05.6(61 Subsidence Survev. Monitorine. and Control Plan <br />The requirements of this section do not apply, Carbon Junction is a surface mine. <br />Technical Revision 08 (v 1.4) 5-57 Revised 9!1997 <br />