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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
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<br />Floods delineated in this area
<br />in greater detail by the Corps
<br />of Engineers, U.S. Army
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<br />39052'30" Sll COMMERCE CITY 6 MI.
<br />I0405Z30" DENVER fCIVIC CEI'HERI 12 MI.
<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 deJineated 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. Flood areas have been identified for: (1) urban areas where the up-
<br />stream drainage basin exceeds 25 square miles, (2) rural areas in humid 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) smaner drainage basins,
<br />depending on topOgraphy and potential use of the flood plains.
<br />The 89th Congress, in Hou~e 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.
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<br />MAP OF FLOOD~PRONE AREAS
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<br />R. 67 W.
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<br />OATUM IS MEAN 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 />Federal Insurance Administration.
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<br />BRIGHTON QUADRANGLE
<br />COLORADO-ADAMS CO.
<br />75 MINUTE SERIES (TOPOGRAPHIC)
<br />'20 1 4'45'
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<br />NORMAL POOL ELEV 5096
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<br />EXPLANATION
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<br />Flood boundaries were estimated from:
<br />Regional stage-frequency relations.
<br />
<br />BRIGHTON. COLO.
<br />N3952.5 - W10445/7. 5
<br />Base by U.S. Geological Survey
<br />1965
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