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Permanent man made structures within two hundred feet of the affected land boundaries <br /> include the Canterbury Ranch Road, fence lines and gates shown on the mine plan map. <br /> There are no utilities within 200 feet of affected land boundaries. The rPnair a� <br /> replacement-Df any structure i the event that mining operations results in damage i <br /> guar�ed.in writing as part of the lease arrangement a weep Fremont Cou nd the <br /> '—I;�Qwner, Bill Canterbury Jr., and Ian owner Gary ra mg._ <br /> Howard Creek is a year round flowing stream draining the western slope of the Sangre <br /> De Cristo Mountains. Howard Creek flows at modest 25 cfs throughout most the year <br /> but is capable of discharging ten times or more that flow rate during short term storm <br /> events. According to local sources, the last major storm event occurred in 1966 and <br /> resulted in flooding in Howard and erosion of a large portion of one of the waste dumps <br /> referenced in this application. The placement of limestone rock and fines along the <br /> Howard Creek channel has resulted in constant transport of sediments downstream for the <br /> past fifty years ranging from small to very large depending on the size of storm event. <br /> Water quality impacts from past mining practices appear to be minimal at this point in <br /> time, in that the vegetation along Howard Creek is well established and robust. <br /> Neighboring land owners have reported seeing trout in Howard Creek directly below the <br /> affected land boundaries. <br /> Watershed characteristics-- The Howard Creek Drainage Basin, located in western <br /> Fremont County on the north facing slopes of the Sangre De Cristo Mountains, actually <br /> includes the Howard Creek drainage, Porter Gulch drainage, and Spring Creek drainage. <br /> The general location of this watershed is Latitude 38 degrees North 24 minutes and <br /> Longitude 105 degrees West 57 minutes. The watershed is bordered on the west by the <br /> Continental Divide, highest point Hunt's Peak at 13071' elevation. Lowest point in the <br /> watershed is at junction of Howard and Spring Creek elevation 7800'. The watershed <br /> area is app. 6600 acres. Relief is very steep with large areas of rock outcrop. Hunt's <br /> Lake, located in the southwestern corner of the watershed and 4.5 miles from the <br /> proposed mine site, is the only lake or catchment basin within the watershed. Meteoric <br /> water tends to run-off quickly and exit Howard Creek's narrow stream channel. Time of <br /> concentration estimates are .9 hour due to the long stream path, but Cn for the watershed <br /> will be in the low 90's due to rock outcrop and steep slopes. Anecdotal information <br /> relates atleast four major storm events occurring on Howard Creek in 1893, 1935, 1966, <br /> and 1975. During those events, peak flows may have approached 1000 cfs or more for <br /> short duration. It was reported by a long term land owner that the creek bed was at one <br /> time entirely buried in limestone waste materials and that Howard Creek crossed the <br /> waste dump on a wooden "flume". The storm event in 1935 removed all of the flume and <br /> a large portion of the waste dump materials. At present, a well defined, incised stream <br /> channel is present with a well developed stand of mature Cottonwoods growing on both <br /> banks. Normal flow rates in Howard Creek are less than 50 cfs. Surface diversion <br /> records reflect app. 25 cfs of appropriated water on Howard Creek. Howard Creek is <br /> considered an itermittant stream by the Water District since it at times is totally <br /> consumed by water users prior to entering the Arkansas River. <br /> 4 <br />