REP49531 - Laserfiche WebLink

Home Browse Search

Require- Requirement Require-ment ment complied Comment citation with ? es/no V. Minimization of disturbance to the CDMG hydrologic regulation yes balance within 4.05.1(1) and adjacent to the ermit area W. Prevention of Impacts to surface water outside permit area has been material damage CDMG TDS loading of surface streams, and does not impair water to the hydrologic regulation yes use. There are no data indicating impacts to an aquifer balance outside 4.05.1(1) outside the permit area. the ermit area The only apparent major hydrologic impacts at Trapper are TDS loading of the following waters: No Name Gulch stream flow, ground water in spoil backfill at wells GF-7 and GF-I 1, and possibly the bedrock aquifer, and the 3rd White sandstone at well P-8. Although these are major impacts, they do not rise to the level of material damage X. Agreement of CDMG because use or potential use is not impaired. Of these observed regulation impacts, only the impact at well P-8 has not undergone hydrologic 2.05.6(2) and final bond release. impacts with requirement The TDS increase in No Name Gulch was addressed in ' "probable to keep es DMG's review of Trapper s 1997 annual report (TR-78). hydrologic information y TDS loading of ground water in the 3`d White Sandstone current, in well P-8 may be the result of suspected spoil leachate consequences (PHC) projected CDMG dischazging from A-pit 1100 ft. upgradient from the well. regulation Surface infiltration may affect the well because the well is in mining permit 2 03.3(1) only 35 feet deep. The well monitors sandstone beds that probably aze permeable, and that may be in direct communication with the land surface. Well P-8 is 150 feet from a pond which has high inflows (East Pyeatt # I ). High nitrate content of samples may indicate the well receives infiltration of surface water. Y. Adequacy of CDMG ground water regulation yes monitorin ro ram 4.05.13 1) Z. Adequacy of CDMG surface water regulation yes monitoring 4.05.13(2) ro ram Page 7