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<br />106000' 411 ~13 1860000 FEU 414
<br />Approximate boundaries of flood-prone areas are shown on this map. There is, on the
<br />averag:e, about 1 chance in 100 that the designated areas will be inundatf:'d 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 mw 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 com~ideration the pos-
<br />sible effects of existin~ 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 excet'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. in Hou~e Document 46':;, 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 purpn1'le~ such
<br />as structural designs, economic studies, or formulation of lan<l.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 />R.9 E
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<br />_20t10rlm [
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<br />SCALE 1.2,1000
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<br />EXPLANATION
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<br />Flood boundaries were estimated from:
<br />Regional stage-frequency relations.
<br />
<br />1...:11 'MlnQ
<br />,
<br />
<br />CONTOUR INTERVAL 5 FEET
<br />DATUM 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.
<br />
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<br />COLORADO
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<br />QJADPAI":..;l[
<br />
<br />ATiQr,
<br />
<br />ALAMOSA WEST. COLO,
<br />N3722 5-W10552S 75
<br />
<br />1966
<br />Base by U.S. Geological Survey
<br />
<br />1974
<br />
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