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<br />. <br /> <br />. <br /> <br />. <br /> <br />... <br />. . . <br /> <br />" . <br /> <br /> <br /> <br />MEMO <br /> <br />TO: <br />Rebecca Haug, Environmental Administrator <br />COMPANY: <br />City of Elk River <br />FROM: <br />Matthew Ledvina, P.E. <br />DATE: <br />March 27, 2006 <br />RE: <br />Midwest Asphalt - Application.for CUP and License Amendment (#CU-81-13) <br />NOTES/COMMENTS: <br /> <br />As requested, I have reviewed the above referenced document for City of Elk River CUP and License <br />Amendment for Midwest Asphalt Corporation (MWAC). The general operations for MWAC will be in <br />accordance with the previous documents with the noted modifications. The following comments are <br />provided in support of Conditional Use Permit (CUP) amendment for the Site. <br /> <br />2006 Operations Plan <br /> <br />MWAC provided an Existing Conditions Plan with their application. MWAC should provide current <br />elevation information for the site to enable assessment with the Final Reclamation grading plan. I <br />was unable to determine the extent of the site which has been reclaimed. From the aerial photos, it <br />appears that the extent of reclamation has been limited. I recommend that MWAC present a <br />schedule for reclamation of areas of the site that have been mined and are currently inactive (see <br />item (09) b. of the CUP) <br /> <br />Groundwater Conditions <br /> <br />Apparently, ground water conditions have not been assessed for the Site. Extensive data conceming <br />the hydrogeology of the adjacent site to the north has been developed for the proposed Waste <br />Management's Site expansion. This technical information indicates that the ground water table likely <br />occurs at an elevation between 955 and 950 msl. The Final Reclamation grading plan indicates that <br />the lowest mined elevation would be approximately 947 msl. This implies that a significant portion of <br />the native soils will be mined below the ground water table elevation. The lack of vertical buffer of <br />unsaturated soil increases the potential for impacts to groundwater resources in the event of a spill at <br />the site. <br /> <br />. <br />MINNEAPOLIS <br />1000 IDS Center <br />80 South Eighth Street <br />Minneapolis, MN 55402 <br />612.347.6789 <br /> <br />o <br />HOUSTON <br />Suite 200 <br />520 Post Oak Boulevard <br />Houston, TX 77027 <br />832.203.1492 <br /> <br />o <br />DENVER <br />Tower One, Suite 580 <br />1515 Arapahoe Street <br />Denver. CO 80202 <br />nO.956.53oo <br /> <br />"" <br /> <br />o <br />PROVIDENCE <br />Suite 2020 <br />One Financial Plaza <br />Providence, RI 02903 <br />40 1.278.4300 <br /> <br />o <br />ANCHORAGE <br />Key Bank Plaza, Suite 30 I <br />60 I W. Fifth Avenue <br />Anchorage, AK 9950 I <br />907.777.5300 <br />