Laserfiche WebLink
Rule 2.05.6 <br />2. Page III-18 of the PAP discusses subsidence mitigation and monitoring regarding <br />County Road #65. The text reads "posting speed limit and subsidence hazard <br />signs whenever coal is extracted under the county road. County Road #65 will be <br />monitored daily while mining below it and during the active subsidence period. " It <br />is not clear when these measures will commence and when they will cease. <br />Please describe specifically using a distance from the longwall face when <br />these measures would begin and when they would cease. Also include how <br />this information will be documented and reported to the Division. <br />Page III-26 of the PAP describes the construction of vent shafts RS-1 and RS-2 <br />having "middle zones of the annuluses are gravel filled with weep holes drilled in <br />the liner to allow drainage". The reclamation plan for the two shafts includes <br />filling the shafts from top to bottom but does not include any information on how <br />the graveled portion of the annulus would be sealed or grouted isolated to prevent <br />commingling of ground water. Please review this section and respond as <br />appropriate. (Rule 4.07) <br />4. Points of compliance regarding ground water have been recently determined for <br />the Deserado Mine (see DRMS 2005 Annual Hydrology Report review). Please <br />include these points of compliance in the hydrologic monitoring program <br />and identify the monitoring frequency and the sampling parameters for <br />these ground water wells. <br />Please add hardness to Table II.C-13 for the ground water sampling <br />parameters for the Deserado Mine. Where Table Value Standards are used, <br />hardness of the water in question is necessary for the calculation of the standard. <br />6. Generally, the reclamation plan is covered in Section V of the PAP. The <br />exception is structure demolition, which is discussed in Section IV Mine Surface <br />Facilities, Operation Plan, specific to each structure. Currently, the reclamation <br />cost estimate includes off-site disposal of anything except concrete rubble. <br />Please clarify what demolition debris (steel, wood, concrete, rubber, <br />fiberglass, etc.) is approved for on-site disposal. If there is correspondence <br />or other information in the PAP, please identify it specifically. The Division is <br />aware of letters to Rio Blanco County and the BLM regarding on-site disposal of <br />demolition debris but is not aware of any response from these other agencies. <br />Rule 4.15 <br />7. The Division believes it would be appropriate (prior to reclamation of the current <br />refuse area disturbances scheduled for 2009) to give careful consideration to the <br />