Laserfiche WebLink
INTEROFFICE MEMORANDUM <br />TO: 'I'Ob1 KALDI:NR~\CI- <br />FROM: JAN ET RIN S <br />SUBfECT: 'ITZ<\PPI? ;b[INH, 981-0t DtL\SE III BOND RELEASE, Sl. 07 <br />DATE: 4/ 11 /2006 <br />CC: DAN F-IERNANDE7. <br />Trapper Mining Inc has applied fox a Phase III bond release on a portion of the Trapper Mine. This Phase <br />III bond release application consists of 762.8 acres previously disturbed in association with the Ashmore, <br />Browning, Colt, Derringer, Enfield, and Hawken pits. 577.3 acres were reclaimed to apost-training land use <br />of rangeland between 1987 and 1995. 185.5 acres were reclaimed to apost-mining land use of cropland <br />between 1993 and 1994. <br />The lands requested for Phase III bond release have received previous Phase II bond release approval during <br />SL-O6, approved September 6, 2005. At that time findings were made that the reclaimed lands had achieved <br />the requirements for Rule 3.03.1(3)(6). <br />I made an initial effort to evaluate the area included in SL-07 for Rule 4.05.11 and 4.05.12, Groundwater <br />Protection and Protection of Groundwater Recharge Capacity. The operator has submitted Annual <br />Hydrology Reports as revisions to the pexxnit up until the Annual Hydrology Report for 2003. These reports <br />may be found as Appendix W of the pexttvt. Beginning with water year 2004, the operator began submitting <br />the reports as stand alone Annual Hydrology Reports. Ground water monitoring as well as surface water <br />monitoring data axe contained in these annual reports. <br />The SL-07 application addresses the Potential Hydrologic Impact. The operator's predicted Probable <br />Hydrologic Consequence is found in Section 4.8.3 of the permit. <br />The Third White Sandstone aquifer cvas intercepted by the Browning pit in the northwest portion of the <br />permit. Recharge to the Third White Sandstone is through the backfill aquifer along the northern boundary <br />of the Bowning pit. <br />Impacts to Adjudicated wells: The First White Sandstone aquifer overlies the Third White Sandstone and has <br />two shale unit aquicludes in the intervening interburden. A domestic water supply well, W-1406-78, is <br />finished in the First White Sandstone north of the reclaimed Colt and Browning pits. Trapper installed a <br />monitoring well, GLUZ-1, in the First White Sandstone in 1988, to evaluate water quality in the First White <br />Sandstone aquifer downgradient of the Colt and Browning pits. The GLUM-1 well is located between the <br />historic Colt and Browning pit limits and well W-1406-78. Permit Map 31 shows the location of water wells <br />on the permit area and within one mile of the permit area boundary. <br />