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<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
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<br />Approximate houmlaries of flood-prone areas are shown on this map. There is. on the
<br />avera~e, 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 delint'ated through use of readily available infonna*
<br />tion on past floods rather than from detailed field surveys and inspections. In ~f'neral,
<br />the delineated areas are for natural eondition~ and do not take into consideration the pos-
<br />sible ('ffeets of existing or proposed flood control structures except where those effects
<br />could be evalualt>d, Flood areas have been identified for: (1) urban areas where the up-
<br />stream drainage basin exceed" 2;) 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 draina~e basin exceeds 250 square miles, and (4) smaller drainage basins.
<br />dept~nding on topography and potential use of the flood plains.
<br />The 89th Congress. in Hou~e Document 46.5. recommended the preparation of flood-prone
<br />area maps to assist in minimizing flood losses by quickl,.,.. identifying the areas of potential
<br />flood hazards. T\.'lore detailed flood information may be required for othpr purposes such
<br />as structural de~igns. economic ~tudies, or formulation of land-use rt>gulations. 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 />DATUM IS MEAN SEA LEVEL
<br />This work was performed by the U.S. Geologica! Survey for
<br />and funded by the Federal Insurance Administration.
<br />Department of Housing and Urban Development. to meet
<br />provisions of the National Flood Insurance Act of 1968.
<br />
<br />1974
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<br />F;XPLANATlON
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<br />Flood boundaries were estimated from:
<br />Regional stage-frequenc:\-' relutions.
<br />
<br />~J
<br />
<br />WELDONA. COLO.
<br />N4015W10352.5/7.5
<br />Base by U.S. Geological Survey
<br />1951
<br />
<br />QUADRANGLE LOCATION
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