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The preceding estimated values for hydraulic conductivity and transmissivity are <br />somewhat lower than most values reported for these aquifers by mines in the area. <br />Tables 5 and 6 in Robson and Stewart's (1990) report indicates ranges in hydraulic <br />conductivity from 0.1 to 0.6 ft. /day for the overburden aquifer and two values of <br />.02 and .4 ft. /day for the Wadge Coal. <br />The Division's PHC findings are based on the possibility of greater inflows than <br />those predicted by the applicant. The Williams Fork Formation overburden which <br />locally contains the Lennox Coal Seam, may contain perched aquifers as well as <br />acting as a limited aquifer system near the Wadge coal. The overburden does not <br />contain or transport significant amounts of water in this area. <br />The applicant states that no hydrologic effects due to mining will be noticed at <br />Temple Well No. 1 (a domestic water right), located south and west of the mine <br />site. Eventually, some effects will be seen at this well. The effects may be <br />exhibited as increased levels of dissolved solids or other chemical parameters <br />(sulphur, iron) and /or diminished quantity of water at the well. These effects will <br />probably not be seen until a number of years after mining has reached its closest <br />point to the well. Eventually, effects will diminish as the dissolved solids are <br />leached from the spoils, and the aquifer characteristics return to normal. <br />Locally, the major impacts of mining include affecting the quantity and /or quality of <br />Springs S -1, S -5, S -23, S -41 and S -45. Effects of mining at these sites will not be <br />observed for a few years after mining is at its closest to these points. The Olson <br />Spring (5 -45), located about 9,000 feet downgradient of mining, could potentially <br />be impacted. This spring, which issues from the Dry Creek alluvium, could suffer <br />a degradation in water quality. This would occur if the Hubberson Gulch and Dry <br />Creek alluvium are recharged by the spoils aquifer discharge. As will be discussed <br />in the Surface Water section of the Probable Hydrologic Consequences Assessment, <br />this discharge will be of very poor quality. If the quality of Olson Spring, a <br />domestic water right, is affected, the applicant will be responsible for replacing this <br />impacted water with domestic quality water in the adjudicated quantities. <br />The probable impacts to these sites will most likely be observed as a diminution in <br />quantity of water available and a degradation of water quality. The impacts to <br />Spring S -5, a colluvial spring, and S -41, a Williams Fork Formation spring, will be <br />observed as a decrease in quantity of water available and a degradation of water <br />quality. The recharge areas for these springs will be mined out. Springs 5 -41 and <br />5 -23 both feed registered stock ponds. 5 -41 feeds Temple Pond No. 2, a registered <br />right with the State of Colorado. Spring 5 -25 was mined through in the mid to late <br />1990's. Spring S -1 may be affected by a redirection of ground water potential <br />toward the backfilled pits. <br />Seneca II -W Findings Document 37 C- 1982 -057 <br />Permit Revision No. 6 January 6, 2012 <br />