Laserfiche WebLink
0.1 foot of water is in the well; however, it is suspected that • <br />this water is a condensate collected in the bottom of the well. <br />9. Well GW-N 11 -- Underburden <br />Water level measurements have been taken at this well on a <br />monthly basis since October, 1979. The ma~:imum observed season~-1 <br />water level fluctuation is about 1.1 feet. Generally, the water <br />level fluctuation is on the order of a few tenths of a foot. The <br />elevation of the water level in this well does n~~t coincide with <br />the water level-piezometric surface contours presented on Exhibit <br />3. Erroneous conclusions were reached regarding water levels in <br />this well in the Nucla Permit Revision because of errors in the <br />completion records. It is PCC's opinion that it will no longer be <br />necessary to replace this well. We11 GW-N11 appears to be in <br />hydraulic connection with the adjacent drainage ~:hannel and this <br />probably accounts for the water level differences mentioned in the <br />PR. This well was not used in the construction of the water <br />level-piezometric surface contours. <br />10. Wells GW-N23, N24, and N25 -- Overburden, Dakota Coal, and <br />Underburden <br />These monitor wells were installed in early June, 1986. TFiey <br />are located in what has been referred to as the scraper area in i:he <br />southeastern part of the permit area. No ground water was <br />encountered during the construction of these wells. The field <br />records indicate that there is water iri the wells. HowevEar, <br />these water level measurements represent residual surface water <br />inflow from precipitation events prior to the surface sealing <br />of the well annulus in mid-July. <br />C. Water Level-Piezometric Surfaces <br />Water level-piezometric surface contour maps <br />constructed (Exhibits 2 and 3) for the overburden and <br />and the underburden lithologic units (immediately bel~ <br />coal). Due to the discontinuous nature of the <br />geologic strata, aquifers vary from confined to <br />have been <br />Dakota coal, <br />>w the Dakota <br />near-surface • <br />water table <br />76 <br />