2012-02-21_REVISION - M2001012 - Laserfiche WebLink

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Mr. Lockard Page I2 February 21, 2012 g) Show the locations of overburden and topsoil stockpiles h) Show the name of the applicant i) Must be prepared and signed by a registered land surveyor, professional engineer, or other qualified person j) Give date prepared k) The acceptable range of map scales shall not be larger than 1 inch = 50 feet nor smaller than 1 inch = 660 feet 1) Also include an appropriate legend, map title, and north arrow 2. The Applicant has stated there will be road crossing over Brunker Creek. Please identify the locations of the creek crossing on the Mining Plan Map. 6.4.4 Exhibit D — Mining Plan 3. The Applicant has stated they wish to mine beyond the current 20 acre limit. As required by Rule 6.4.4(d), please specify the size of the area(s) to be worked at any given time, i.e., how much area will be disturbed prior to reclaiming the site? 4. The Applicant has identified seven separate pits to be mined. Please specify the size of each pit. 5. The Applicant has stated all mining will occur outside of Brunker Creek. The Division is concerned the pits, given their proximity to Brunker Creek, will be captured during a flood event and will result in a series of lakes. The original Mining Plan states sand and gravel would be mined to a depth of 8' to 12' or until the clay stratum is encountered. The clay layer at the bottom of the pit may prevent water from flowing through the natural drainage system. Rule 3.1.6(1)(a) states disturbances to the prevailing hydrologic balance of the affected land and of the surrounding area and to the quantity or quality of water in surface systems be minimized. Please describe how you will minimize disturbances to the prevailing hydrologic balance and ensure the pits are not capture during a flood event. 6. During the last inspection of the site, the Division observed standing water in what the Applicant has identified as the `original pit'. The source of the water was from direct precipitation and stormwater infiltration. Any storm water retained must infiltrate to the natural stream system within 72 hours or a substitute water supply plan or an augmentation plan must be obtained from the Office of the State Engineer. Please describe how you will ensure that all stormwater is returned to the natural drainage system within 72 hours. 6.4.5 Exhibit E — Reclamation Plan 7. The original Reclamation Plan calls for reclaiming the pit walls to 3H:1 V. Please clarify if the pit walls of the individual pits will still be reclaimed to 3H:1 V. 8. Please clarify if the pits will be mined to a depth of 8' to 12', as stated in the original Reclamation Plan.