7.3. SR 01-21-2014 - Laserfiche WebLink

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Mr.Chris Leeseberg December 17,2013 Page 2 of 4 a.The physical relationship of the proposed extraction site to the community and existing community development. Figures 1-5 and page 3 of the application provide the relevant information. b. Site analysis information such as trees,depth of topsoil,adjacent and on-site buildings and land uses,flood levels,watercourses,and elevation and percent slope within 100 feet beyond the perimeter of the site. Figures 3 and 4,and page 5 of the application provide the relevant information. c.The estimated quantity of materials to be extracted. Page 4 of the application provides the relevant information. d.The depth of water tables throughout the proposed extraction site. The information is provided on page 4 and Figure 6 of the application. The groundwater flow interpretation is not sufficiently documented and,in the northern parcel,is in conflict with Figure 3 of the"Sampling and Analysis Plan"Elk River Landfill,January 2011. In the Plan,the groundwater table elevation is shown at 954 near the intersection of 221St Street and Hwy 169 while Figure 6 shows this elevation at 945. A groundwater divide,as described on page 4 of the application,is not consistent with the area(Elk River Landfill)and regional groundwater flow interpretations. Without additional information from onsite wells for the property south of 221St, the anticipated groundwater elevation should range from 954 on the east and 951 on the west. The"Excavation Plan",C2 should be modified to reflect these anticipated groundwater elevations. The applicant should also address the use of the historic high groundwater levels in establishing the excavation basegrades. e.The average thickness of overburden on the proposed extraction site. The information is provided on page 4. f.A detailed map of the highways, streets,roads or other public ways, and any private easements or private property,upon and along which the material removed shall be transported (haul roads).The map shall identify all proposed haul roads from the proposed excavation site to the Elk River corporate limits. The information is provided on page 5 and Figure 5 of the application. (8)The plan of operation,including processing,if any,the nature of the processing and equipment,location of the processing plant, source of water,disposal of water,reuse of water, and use of explosives. The information is provided on page 5 of the application. The plan of operation does not identify where the phasing of mining(and reclamation)will occur and the timing for each phase. The Site should be excavated in an orderly fashion to reduce the area of open mining at any one time. In particular,it is recommended that the northern portion of the Site be reclaimed prior to initiation of mining in the new parcel proposed for the expansion. The future location of the main operations area and office,now located in the southeast corner of the northern parcel,should be identified on the(phasing)Excavation Plan,C2. The Excavation Plan should also show the