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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />
<br />"84
<br />
<br />INDIAN HILLS QUADRANGLE
<br />COLORADO-JEFFERSON CO.
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<br />;9621 NW
<br />
<br />.
<br />
<br />MAP OF
<br />
<br />FLOOD-PRONE AREAS
<br />
<br />I. \ f::::\ 4963/1 NW
<br />J. pt ~ (MORRISON)
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<br />39"30'
<br />I 105'07'30"
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<br />481 2080 000 fEET
<br />
<br />",pproximate boundaries of fltoo-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 nood-prone areas have been delineated through use of readily avai)abl~ infonna-
<br />tion on past floods rather than from detailed field surveys and inspections. I,n 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 th~e effects
<br />could be evaluated. Flood areas have been identified for: (1) urban areas where the up~
<br />stream drainage basin exeeeds 25 square miles, (2) rural areas in humid regions where the
<br />upStream drainage basin exceP.ds-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, jn 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. Geological Survey. other Federal agencies,
<br />or State, local, and private agencies.
<br />
<br />'8212'30'
<br />
<br />SCALE 1:24000
<br />o
<br />
<br />EXPLANATION
<br />
<br />"l-
<br />Y","'7\S'
<br />~~'"
<br />,<~
<br />-1-<,,~
<br />
<br />,
<br />,
<br />1000 0 1000
<br />>---1 >---1_
<br />
<br />1 MILE
<br />
<br />5000
<br />
<br />6OClO 7000 FEET
<br />,
<br />
<br />2000 3QC() 4000
<br />
<br />Flood boundaries were estimated from:
<br />Regional stage-frequency relations.
<br />
<br />o
<br />
<br />1 KILOMETER
<br />
<br />I 5
<br />0---0 ___ 0---0
<br />
<br />>----i 0-----<
<br />
<br />EJ
<br />
<br />CONTOUR INTERVAL 40 FEET
<br />DATUM IS MEAN SEA LEvEL
<br />
<br />Prepared by the U.S. Department of the Interior.
<br />Geological Survey, in cooperation with the
<br />U.S. Department of Housing and Urpan Development,
<br />Federal Insurance Administration.
<br />
<br />INDIAN HILLS, COLO,
<br />N3930, W10507.5/7.5
<br />Base by U.S. Geological Surrey
<br />\965
<br />
<br />QUADRANGLE LOCATION
<br />
<br />1973
<br />
<br />7253
<br />
<br />~
<br />
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