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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
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<br />MAP OF
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<br />AREAS
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<br />CONIFER QUADRANGLE
<br />COLORADO-JEFFERSON CO
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<br />Approximate boundaries of flood-prone areas aTe 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 proJK)sed 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) 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 regnlations. 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 />Flood boundaries were estimated from:
<br />Regional 8tage-frequency relations.
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<br />EXPLANATION
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<br />C\JNTOUR "lTER"Al 4( re[
<br />'ArUM \/IrAti:A ,~
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<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.
<br />
<br />.
<br />COLORADO
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<br />QUAORANGLF' '1CA'CON
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<br />CONIFER COLO
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<br />\jl9 I.J
<br />Base by U.S. Geological Sur....ey
<br />1965
<br />PHOTOREV'SED 1971
<br />
<br />1973
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