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W.....'NGTON. D. C." ~04045 <br /> <br />MAP OF <br /> <br />FLOOD-PRONE AREAS <br /> <br />- <br />4161 <br /> <br />~40 000 <br />tff[T <br /> <br />. <br /> <br />. -- <br /> <br />, <br /> <br />.' <br /> <br />t <br />, <br />,. <br />I <br /> <br />I <br /> <br />6 <br /> <br />~ <br /> <br />3101"\1'\1"\ <br />FEET <br /> <br />2 <br /> <br />Approximate boundaries of flood-prone areas are shown on this map. There is, on the <br />average, about 1 chance in 100 that the designated areas will be inundated in any year. <br />This information is important to public agencies and private citizens concerned with future <br />land developments. <br />The flood-prone areas have been delineated through use of readily available informa- <br />tion on past floods rather than from detailed field surveys and inspections. In general, <br />the delineated areas are for natural conditions and do not take into consideration the pos- <br />sible effects of existing or proposed flood control structures except where those effects <br />could be evaluated. F100d areas have been identified for: (1) urban areas where the up- <br />stream drainage basin exceeds 25 square miles, (2) rural areas in huntid regions where the <br />upstream drainage basin exceeds 100 square miles, (3) .rural areas in semiarid regions where <br />the upstream drainage basin exceeds 250 square miles, and (4) smaller drainage basins, <br />depending on topography and potential use of the flood plains. <br />The 89th Congress, in House Document 465, recommended the preparation of flood-prone <br />area maps to assist in minimizing flood losses by quickly identifying the areas of potential <br />flood hazards. More detailed flood information may be required for other purposes such <br />as structural designs, economic studies, or formulation of land-use regulations. Such de- <br />tailed information may be obtained from the U.S. G~ological Survey,otH.er Federal agencies, <br />or State, local, and private agencies. <br /> <br />SCALE 1:24000 <br />o <br /> <br />) <br />. <br /> <br />1 MilE <br /> <br />EXPLANATION <br /> <br />1000 2000 3000 4000 5000 6000 <br /> <br />7000 FEET <br />, <br /> <br />1000 0 <br />.................. ......... <br /> <br />Flood boundaries were estimated from: <br />Regional stage. frequency relations. <br /> <br />1 KilOMETER <br /> <br />1 5 0 <br />0....-..0 0----0 0----0 __... 0----0 <br /> <br />EJ <br /> <br />W ALSENBURG SOUTH, COLO. <br />N3730-WI0445/7,5 <br />Base by U.S. GeOlogical Survey <br />1963 <br /> <br />CONTOUR INTERVAL 20 FEET <br />DATUM 1$ MEAt'! SEA LEVEL <br />Prepared by the U.S. Department of the Interior, <br />Geological Survey. in cooperation with the <br />U.S. Department of Housing and Urban Development. <br />Fed~rat Insurance Administration. <br /> <br />QUADRANGLE LOCATION <br /> <br />1973 <br />