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- _ October 19, 1987 <br />Review--404 Permit Application <br />No. CO-OYT-0501-1 (Nalco, Inc.) <br />Page Two <br />3. We are concerned about the elapsed time between any failure of the <br />proposed dike and spillway, ark the restoration of the:;e protective <br />structures. <br />4. We are also concerned about maintenance of the dike and spillway <br />after mining operations are completed and the site abandoned. <br />Issues outlined in item numbers three and four above were not discussed <br />previously, but we believe they should be addressed through requi~pments <br />applied to any permits issued. <br />Please contact me at (303) 546-5454 if you have any questions or c:amients. <br />Sincerely, <br />R. Q. Brown <br />District Preconstruction Engineer <br />RQB/ls <br />cc: Mr. James MrArdle <br />Mined Land Reclamation Division <br />Centennial Building - Room 423 <br />1313 Sherman Street <br />Denver CO 80203 <br />Mr. William Eisenman, General Mgr. <br />Nalco, Inc. <br />P.O. Box 591 <br />Lamar, CO 81052 <br />Mr. A. S. Andrews, P.E. <br />WRC Engineering, Inc. <br />1660 South Albion Street <br />Suite 500 <br />Denver, CO 80222 <br />