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<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 />Proposed Local Protection Project: Cleaning debris vegetation to maintain capacity of King <br />and Anderson Arroyos. <br /> <br />C. Flood Hazard Data <br /> <br />1, Sources 'of Water: Flooding on the Arkansas River results from the annual snowmelt <br />in its headwater regions, which is augmented by periods of vel)' heavy rain. Historical <br />data indicates that peak discharges on the river are closely related to heavy <br />thunderstorm rainfall originating downstream of Pueblo. This type of cloudburst flow <br />in the river is characterized by high peak flows of short duration. Flooding due to <br />snowmelt is usually abated as the river reaches the plains, and has had little impact <br />upon the area, Pueblo Reservoir controls approximately 40"10 of the area's watershed, <br />consisting of the upper reaches and headwaters of the Arkansas River. This major flood <br />control structure has a large impact on flood flows in the vicinity of Pueblo, but has had <br />only limited effect on flood flows in the La Junta/Otero County area. <br /> <br />2, Depth of Flooding: Flood depths are varied, ranging from three to more than 11 feet. <br />For a full range offlood frequency, elevation and discharge data for the area, please see <br />Table 1, attached. <br /> <br />3. Velocities: Loca1 flooding is relatively low velocity flooding. For full details, please see <br />Table 1, attached, <br /> <br />D. Problem Assessment <br /> <br />1. Land Use and Buildings: Developments in the floodplains include residential, <br />commercial and industrial. The City of La Junta occupies about two miles,in the central <br />part of the southerly flood plain of the Arkansas River. North La Junta and La.Junta <br />Gardens are fuir1y densely developed residential areas occupying approximately one <br />mile of the north bank floodplain of the Arkansas River. Also, the mainline of the <br />Burlington Northern/Santa Fe Railway Company and a branch line from La Junta to <br />Denver traverse the floodplains, <br /> <br />2, Critical Facilities: Critical facilities located in the floodplains include the City of La <br />Junta's well fields, from which the city draws its water; the Otero County Sherifl's <br />Office, which is the center of the county's emergency services; and Wallace Oil <br /> <br />15 <br />