2005-10-18_REVISION - M2000158 (2)

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STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 1313 Sherman St., Room 215 C O L D RA D O Denver, Colorado 80203 DIVISION O F Phone: (303) 8653567 MIN SRALS FAX: (303) 832-8106 G E O L O G Y p f Oetober 18, 2005 REC LANATION•NININO SAf ETY•ECIENCE Rocky Hoffschneider Bill Owens Platte Sand & Gravel LLC cnvemor P.G. BG}C 180 Russell George LtttletOn, CG 80106 ERecutive Director Ronald W. Cottony Division Director RE: Platte Sand & Gravel LLC, File No. M-2000-158 Natural Resource Trustee S & H Mine; TR-03 Application Adequacy Review Deaz Mr. Hoffschneider, The Division received Technical Revision 03 (TR-03) for the S & H Mine, Permit Number M-2000-158. The Division of Minerals and Geology (Division) is required to make an approval or denial decision no later than October 31, 2005, therefore, your response to the following adequacy review concerns should be submitted to the Division as soon as possible. Rule 6.2.1(2) requires that maps be signed by a registered land surveyor, professional engineer, or other qualified person. Figure TR-1 was not signed. Please resubmit a signed copy of the map. Office of Active and Inactive Mines 2. Per Rule 6.3.3(g), please specify the location and dimension of all haul roads that will be used during the life of the mining operation. Any improvements necessary on existing roads and the specifications to be used in the construction of the new roads needs to be described in the permit and included as part of the permitted acreage. The applicant will also need to address reclamation of any new or improved roads constructed on site. Please specify the construction methods, dimensions and the drainage/runoff conveyance structures of all new and upgraded roads. Also, please provide information regazding the design of the ditch crossings so that they may be included in the reclamation cost estimate. 3. Please submit the surface use agreement between Platte Sand & Gravel LLC and Kerr-McGee that contain notarized documents in accordance with Rule 6.4.19(a) or Rule 6.4.19(c). Alternatively, the Operator may provide an engineering plan for each proposed utility crossing for which an acceptable notarized document is not obtained. 4. Please inform the Division as to how topsoil piles will be protected to prevent wind and water erosion and include the dimensions of the piles and a temporary seed mixture. Please state the proposed seed mixture, the rate in PLS/acre, the application method and timing of seeding. In addition, please depict the location of all future topsoil and overburden piles to be constructed on site. 5. The operator depicts a topsoil pile on Map Exhibit C-1-TR. Overburden piles were not noted on the map. Please be awaze that topsoil will need to be segregated and stored separately from the overburden material as required by Rule 3.1.9(1). Please locate all current and future overburden piles on the mine plan map. 6. Based on the revised mining plan map, it appears that mining has taken place within 400 feet of the South Platte River. According to the approved plan, at no time will mining take place within 400 feet of the river without first having armored the banks on the riverside that aze subject to erosion and less than 400 feet from the excavation area. During the Division's inspection, armoring was not noted in Office of Mined Land Reclamation Colorado Geological Survey