HYDRO28406 - Laserfiche WebLink

Home Browse Search

Quality of ground water found in the Lower Fruitland Fo oration aquifer is marginal for use as a domestic water supply. Sampling of these aquifers revealed elevated levels of sodium, calcium, and sulfate. Overburden and coal analysis indicate the elevated levels of these parameters should be expected in any ground water encountered in this zone. The alluvium associated with Stollsteimer Creek contains a water table aquifer which is recharged by the creek and by flood irrigation practices. Aquifer tests conducted for Chimney Rock Coal Company by Piteau and Associates estimate a high transmissivity of the alluvium, approximately 100,000 gpd/f t. The alluvium ranges from 1 foot to just over 40 feet in thickness. This aquifer is confined by the steep rock slopes of the Stollsteimer stream valley. This stream valley has been determined to be an alluvial valley floor by the Division. The alluvial valley floor is both flood and subirrigated and used as irrigated pasture land by the landowner. The alluvial ground water recharges the rock strata in the area. The spoils in the southwest section of the mine supports continuously flowing ground water seeps. These areas of the mine are below the level of Stollsteimer Creek and the water table of the Stollsteimer Creek alluvium. Piteau and Associates, using pumping test values for the affected stratum and coals, calculated a theoretical inflow of 10 gpm for the same pit. The permittee will not mine through this alluvial aquifer, although some surface facilities are located on the alluvium. Stipulation No. 2 of the P.R. No. 1 Findings Document set forth the ground water monitoring schedule and parameters. The monitoring requirements have. been altered to some extent by Technical Revision 12, approved January 29, 1986, which reduced the number of required parameters, and Minor Revision No. 21, approved June 9, 1986, which altered the sampling requirements for certain monitoring wells. Stipulation No. 14, below, outlines the current ground water monitoring requirements. Stipulation No. 14 THE GROUtJD WATER MONITORING PROGRAM WILL INCLUDE THE FOLLOWING MONITORING FREQUENCY AND ALL WATER ANALYSES WILL BE PERFORMED USING THE PARAMETERS LISTED BELOW: WELL WATER LEYEL WATER SAMPLING DESIGNATION CHECK FREQUENCY FREQUENCY Al QUARTERLY QUARTERLY W1 QUARTERLY NOT REQUIRED W5 QUARTERLY QUARTERLY VJ6 QUARTERLY NOT REQUIRED W7 QUARTERLY QUARTERLY 4!9 QUARTERLY QUARTERLY W10 QUARTERLY QUARTERLY W16 QUARTERLY QUARTERLY -14-