Laserfiche WebLink
Sampling of the proposed mine water dischazge prior to entering the sediment pond is also <br />required and should be considered part of the overall hydrologic monitoring program. <br />Monitoring of mine inflow should also be conducted on a periodic basis and calculations <br />regazding mine water consumptive use would be appropriate to include annually in the <br />hydrologic report. Please add a commitment on page 2.05.6-5 for a submittal date of the <br />annual hydrology report each yeaz. <br />35. Structures and renewable resources aze shown on Mapl and Map 7 and described on page <br />2.05.6-11. <br />Ground water wells are considered structures. Numerous registered wells occur within the <br />permit area. Please include these on Map 7 and include them (or reference them if in <br />another part of the permit application) in the brief description of structures. (see also related <br />question #13) <br />The affected azea (the azea to be subsided assuming a 25 degree angle of draw) is shown as <br />a red dashed line on Map 7. In numerous locations along the proposed permit boundary, the <br />affected azea is shown outside of the permit area. The Division cannot approve potential <br />subsidence impacts outside of the proposed permit azea. Please review mine plans and <br />modify as necessary. <br />• Map 1 appears to show existing buildings and/or residences. Please add residences to Map <br />7 (which shows the extent of the affected area) given the appazent close proximity of mining <br />to a residence(s). <br />36. For each structure the Division suggests reviewing the subsidence prediction, subsidence <br />control plan, and the subsidence monitoring proposed. In particulaz, it is important that the <br />permit text and materials cleazly indicate for each structure the control measures that will be <br />taken, how monitoring will determine the necessity of any particulaz control measure or <br />repair, what form of monitoring will be conducted (visual, monument surveys, other, etc.), <br />when the monitoring will commence, when the monitoring will end, and how frequent the <br />monitoring will be conducted for each structure. Since the mine plan consists of named <br />panels and mains, identifying the commencement and cessation of monitoring using the <br />mine plan as proposed seems appropriate. A table format with supporting text is suggested <br />to clearly present this information in the permit. Consultation with the Division is <br />encouraged regazding this issue due to the considerable amount of experience that the <br />Division has regazding subsidence and monitoring plans at other underground mines in the <br />State. <br />37. For the residence located in the NE %. of section 23, permit commitments regarding <br />potential subsidence control aze found on page 2.05.6-19 and page 2.05.6-21. However, <br />these commitments seem somewhat vague regarding what the control measure(s) will be to <br />prevent subsidence from damaging the residence. Also, a 35 degree angle of draw "halo" <br />triggers some sort of evaluation of the mine plan and/or measures to be taken, yet that <br />"halo" is not shown on any map. Both the residence and the power lines to the north will be <br />subsided within the first five yeaz permit term. Please refer to questions #36 above when <br />