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Table G.I. Internal drainage basins <br />Drainage Runoff Evaporation <br />Basin Acres acre-feet Area Acres <br />North 14.26 2.67 1.20 <br />Ponds (old N) 16.34 3.06 1.06 <br />East 15.86 2.97 1.12 <br />West 25.66 4.81 1.86 <br />South 15.73 2.95 0.98 <br />5. Total proposed pond areas (including those existing in 2010) are 1.69 acres. <br />6. The five drainage basins are closed for anything up to and including 100- <br />year, 24-hour storm events. Based on the 100-yr, 24-hr intensity of 4.5 inches, <br />and assuming a runoff coefficient of 0.5, a storm will generate runoff of 0.19 <br />acre-feet/acre. Assuming an average depth of 3 feet (4 feet with freeboard <br />where applicable), the four evaporation (and infiltration) areas will total 6.24 <br />acres in size (worst-case requirement), above permanent ponds and along <br />the west edge of the disturbed area, to retain the runoff. <br />within 1 mile of site <br />Exhibits for 112(c) AM-02 Application - M-1994-108 - 2010 - Page 36 <br />Notes: Red dots are well permits, green dots are surface water diversion permits. Property <br />boundary (not mining permit boundary) shown in blue. There are two well permits (expired <br />within'/2 mile, plus the pit well permit and a domestic well on-site. There are five surface <br />water diversions within '/2 mile; only one is downstream. Map from Colorado Division of Water <br />Resources.