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Librium formula of Jacob as presented by Ferris et. al., (1962). The solu- <br />tions are shown on Exhibits 5, 23, 24, and 25. The value of transmissivity <br />thus determined for the lower sandy zone was 1 gpd/ft to 2 gpd/ft and about <br />22 gpd/ft for the mine zone strata. Various coefficients of storage were <br />tested in the formula using increasingly better approximations to reproduce <br />the o~served drawdown. The best fit was a ~alue of 10-2. These data in- <br />dicate that both water-bearing zones are extremely limited in water-yielding <br />capability. The water levels (shown on Exhibit 5) suggest that the minine <br />zone and deep sandy zone are well isolated from one another. <br />4.1.3.2 Groundwater Recharge <br />The mining zone strata dip gently to the northeast under the site. The <br />strata are exposed on the canyon walls of the Williams fork River, which <br />marks the southern terminus of the permit area. It is here that the greatest <br />potential for recharge exists. The precise quantity of recharge to the <br />system cannot be estimated, but in their unstressed state the water-bearing <br />zones must be full to capacity, end therefore, recharge is approximately <br />equal to discharge. <br />4.1.3.3 Groundwater Movement <br />The geology of the area and available data indicate that the mining zone <br />strata are essentially dry near the south end of the proposed mine area. <br />Drill hole 102 was known to be dry when it was drilled, and therefore two <br />resource-evaluation wells farther north and down-dip were monitored for <br />flow and field parameters of water quality during drilling. The rationale <br />for monitoring these wells was to establish the presence of water in the <br />mine zone down-dip of the outcrop. A well outside the proposed mine area <br />and on the south end of the property was considered, but since the strata <br />was estimated to contain little or no water, it was decided the well would <br />be of little value and was not drilled. Coal seam one was found to be dry <br />in monitored core holes 111, 114, and well G 1, but water was encoutnered <br />at coal seam two. The standing water level in hole six and hole four was <br />89 feet. Hole six is on strike with monitoring well G 1, which has a water <br /> <br />17 <br />......<....-... .-_~2=ate-.: ._.__..:,..~a~,:.,..,,_~.. -. it ~ ... _.,_~' <br />