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' fanua n' ?000 Kerr Coal Company ° 1999 Annua( Hydrology Report "CO Permit :Vo. G80-006 ~ PnAe ? <br />' 2.0 MONITORING AND ANALYSES <br />Water monitoring activities during the 1999 water year (Oct. 1998 chrough Sept. 1999) were <br />' based on the schedule contained in the Kerr Water Monitoring Plan submitted during the 1991 <br />midterm review and permit renewal. A proposal to reduce momtonng acnvules was submitted <br />by Kerr Coal Company sn Technical Revision No. 19. In a response letter dated January 20, <br />1999, the State of Colorado Division of Minerals and Geology (DMG) accepted some <br />' modifications to the existing monitoring schedule, as described below. <br />Surface water sites 300, 306, 322, and 327, and ground water sites AP-3 and AP-4 ac the loadou[, <br />have been dropped from monitoring. Water quality sampling of the ground water wells in the <br />mme area coal aquifer (79-61) and the mine area overburden aquifer (79-1 and 79-2) has also <br />been eliminated, however, water levels were measured semi-annually at these locations for the <br />' 1999 water year. In October 1998, prior to eliminating the water quality sampling for these <br />wells, an independent sampler (Miller Water Monitor Service) was retained to collect the <br />samples and field data. All other field data and sample collection for the 1999 water year was <br />conducted by James Mossman of Kerr Coal Company. All sample analyses were performed by <br />ACZ Laboratories, Inc. of Steamboat Springs, Colorado. <br />' This report discusses the groundwater and surface water monitoring activities and summarizes <br />the data collected during the 1999 water year In the following sections: <br />' • Section 3 -Mine Area Confined Groundwater <br />• Section 4 -Mine Area Alluvial Groundwater <br />• Section 5 -Loadout Area Alluvial Groundwater <br />' • Section 6 -Mine Area Surface Water <br />• Section 7 -Loadout Area Surface Water <br />• Section 8 -Well Inspection <br />' • Section 9 -Future Monitoring <br />Field data and laboratory data are included in Appendices A through H. Location of the <br />' monitoring stations and wells are shown on Map 1, Mine Area Monitoring Stations, and Map <br />2, Loadout Area Monitoring Stations. <br />1 <br /> <br />1 <br />1 <br /> <br />' ,Montgomery Watson "P.O. Bac 774078 "Steamboat Springs, Colo>ada 80477 "(970J 8796160 <br />' IV.\r5)Unnul R.y.mV~rv\lv+v Hxl.nlup Rry..rt <br />vrvxl„t <br />