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<br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />2.0 STUDY AREA <br /> <br /> <br />2.1 STIJDY LIMITS <br /> <br />This report includes detailed hydrologic analysis of the Bullhead Gulch watershed from the <br />headwaters to Boulder Creek. Also included in this report are the loo-year ultimate basin <br />condition floodplains for the following study reaches: <br /> <br />..-/ <br />Boulder <br /> <br />Table 1 <br /> <br />Study Reach Descriptions <br /> <br />Length <br />(mi) <br /> <br />6.8 <br /> <br />Stream Name <br /> <br />Description of Study Reaches <br /> <br />Boulder Creek to Burlington <br />Northern Railroad <br /> <br />Bullhead Gulch to South Boulder <br />Canyon Ditch <br /> <br />Bullhead Gulch to center of <br />Section 26 <br /> <br />Go Iden <br /> <br />Bullhead Gulch <br /> <br />Indian Peaks Tributary <br /> <br />1.1 <br /> <br />Prince Tributary <br /> <br />2.1 <br /> <br />r-- <br />I <br />I <br />I <br />I <br /> <br />2.2 STIJDY AREA DESCRIPTION <br /> <br />L <br /> <br />The Bullhead Gulch watershed is located approximately 20 miles (mi.) northwest of Denver <br />within Boulder County. A study area vicinity map is given in Figure 1. <br /> <br />~ <br /> <br />N <br /> <br />~ <br /> <br />The study area is comprised of approximately 5740 acres (ac) and is located in all or part of <br />Sections 4, 5 and 6 of Township I South and Range 69 West and Sections 10, 11, 14, 15, 21, <br />22,23,26,27,28,29,31,32,33,34 and 35 of Township 1 North and Range 69 West of the 6th <br />Principal Meridian, The City of Lafayette, City of Louisville and Boulder County are located <br /> <br />Approx, Sea Ie ," = 5 Miles <br /> <br />FLOOD HAZARD AREA OELINEATION <br />BUll.IIEAD GULCH AND lRIBUTARIES <br /> <br />~"'DVAPCEOlICl!tIC!ll,N:. <br />M'OO$lJrt>WI8IrMt._., <br />l.._.~_ <br />nOJ~ <br /> <br />.... <br />'" <br />'" <br /> <br />'" <br />... ,., <br />~ <br />:t: <br /> <br />/'" <br /> <br />I <br />I <br />,J <br />I <br />I <br />I <br />_J <br />I <br />I <br /> <br />L....,. <br />Wneotridge <br />_-1 <br /> <br /> <br />Lokewood <br /> <br />-l <br />I <br />I <br />I <br />I <br />I <br />L <br /> <br />~,~:7 <br />~\'j... <br />aO /a' <br />t.' ."e. <br />-'c,' <br />./ <br /> <br />5 <br /> <br />STUDY AREA <br /> <br /> <br />L__, <br />Northglenn I <br />I <br />Thornton I <br />1_____, <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />t <br />I <br />I <br />I <br />I <br />I <br />I <br />_J <br /> <br />-I <br /> <br />70 <br /> <br />7Q <br /> <br />DENVER <br /> <br />Englewood <br /> <br />- ., Littleton <br />,------ <br /> <br />VICINITY MAP <br /> <br />FIGURE 1 <br /> <br />URBAN DRAINAGE AND FLOOD CONTROL DISTRICT <br />CITY OF LAFAYETTE CITY OF LOUISVILLE <br /> <br />FLOOD HAZARO AREA OEUNEATlON <br />BULLHEAD GULCH <br /> <br />3 <br />