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s - -_ _- 7'l~ttleApplegate,lnc. III IIIIIIIIIIIIIIII RECEIVED AUG 0 q P000 Consultants for Land, Mineral and Wate 6ivision of Minerals and Geology August 2, 2000 Ms. Erica Crosby Division of Minerals and Geology Department of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 RE: Hall Irwin Constntction Corporation Permit No. M-83-090, TR-003 Adequacy Review Response Dear Ms. Crosby: This letter is in response to the Division's Adequacy Review letter dated June 27, 2000, in which two questions were asked. The first questions requested the drainage area and overall grade that would flow into the reclaimed open channel between the McNaney property and Pond Number 1. The area that would presently be drained by such a cJtannel would be the McNaney property and the portion of the lot directly to the north that borders the McNaney property. This encompasses approximately 13.5 acres. However, a letter received by Mr. McNaney from The Kaplan Company, Incorporated on January 29, 1997 indicates that the surrounding land will be raised out of the floodplain and developed upon reclamation of the Ha11 Irwin La Poudre Pit Site. If this is the case, and the McNaney property remains unaltered, only the McNaney property will continue to drain to the channel. Tltis would include approximately 6.9 acres. The slope of the existing topography was measured across the McNaney property from the northwest comer to the southeast corner as approximately 0.26 percent. The second question asked the applicant to address how water will exit Pond Number 1 during years of high mnoff, and keep from backing up into the channel from the McNaney property. This pond is excavated directly into the existing grade, which naturally slopes towards the Poudre River. The lowest point around the lake is therefore between the pond and the river at elevation 4780 feet. If the pond fills beyond this elevation under normal conditions, it will spill naturally over this low point into the river. This is how the pond receded after the 1999 flood, in which no damage to the bank was sustained. 11990 Grant St. • Suite 304 • Denver, CO 80233 5441 Boeing Drive • Suite 200 • Loveland, CO 80538-8855 (303) 452-6611 • Fax (303).452-2759 (970) 46t-9884 • Fax (970) 613-1177