Laserfiche WebLink
5.5.4 Water— General Requirements <br />Disturbances to surface water and groundwater will meet all Colorado water laws and <br />regulations. Necessary permits will be obtained for wells and disturbances. All Colorado and <br />federal water quality regulations will be met both on the statewide level, and on a site - specific <br />standard basis. Any variation will be reclaimed to mitigate water contamination. <br />No siltation structures on the Three Bells Mine lie in drainways. <br />Earth dams will be constructed to impound reservoirs for the reclamation plan. The below grade <br />reservoirs develop on the Three Bells Mine will have earth embankments constructed in stable <br />configuration according to SEO requirements. Reservoir embankments will comply with water <br />pollution laws and will be constructed with inert, low permeability materials to prevent stored <br />water /groundwater communication <br />5.5.5 Groundwater — Specific Requirements <br />Groundwater quality standards will be maintained during reclamation operations. Deviations <br />from regulated water quality standards as a result of mining operations at Three Bells Mine will <br />be reclaimed in an expedient and appropriate manner. <br />The Three Bells Mine has no areas classified by the Water Quality Control Commission <br />(WQCC) to be monitored for groundwater quality. Mining and reclamation activities in areas not <br />classified by the WQCC will be carried out in such a manner to protect groundwater resources as <br />outlined by the WQCC. <br />Groundwater disturbances and interaction is anticipated to be minimal. Measures shall be taken <br />to preserve existing groundwater resources as reclamation commences. Points of compliance and <br />groundwater sampling will be implemented on Three Bells Property and hydrologically <br />downstream as appropriate and required by the Board. <br />MODFlow models and analyses have been created and run to demonstrate the anticipated effect <br />of reclamation on existing groundwater resources. Models were created to estimate the effect of <br />lined reservoirs in the reclaimed mine site on groundwater conditions and flow. Results from <br />MODFlow modeling are available in Attachment C. <br />5.5.6 Topsoiling <br />Overburden has been stripped from mined areas and stockpiled close to the Cache la Poudre <br />River for use in reclamation. Stockpile locations are away from daily operations and require <br />minimal disturbance, as per the Rules. Placement of overburden will be done is such a manner so <br />as to create a relatively uniform layer of topsoil, ranging in thickness from 3 -12 ". <br />Stability of any replaced topsoil will be of importance as any areas to be backfilled are planned <br />to be used for housing development. <br />