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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />~ GEOLOGICAL SURVEY
<br />104*S2'30"DENVE:R 19 "'fl,
<br />'3):~~ '~/!il .
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<br />
<br />MAP OF FLOOD-PRONE AREAS
<br />
<br />CASTLE ROCK NORTH QUADRANGLE
<br />COLORADO-DOUGLAS CO
<br />7.5 MINUTE SERIES (TOPOGRAPHIC)
<br />NEj4 CA..~TlE ROCK 15 OUADRANCLE
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<br />39"22'30" ~ . . .
<br />104052'30" Cb~~RAOO SPRINGS .J9 MI (~:n]J
<br />Approximate boundaries of flood-pfime 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 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 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 regulations. Such de~
<br />tailed information may be obtained from the U.S. Geological Survey, other Federal agencies,
<br />or State!lo~!-!Id_~ri~e_~g~nci^e8,-
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<br />SCALE 124000
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<br />I MILE
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<br />EXPLANATION
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<br />5000 6000 7000 FEET
<br />_-" ---------J
<br />1 KILOMETER
<br />~
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<br />Flood boundaries were estimated from:
<br />Regional stage~frequency relations.
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<br />CONTOUR INTERVAL 20 FEET
<br />DATI)M IS MEAN SEA L['Vn
<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 />EJ
<br />
<br />QU,I;DPANGlE LOCATION
<br />
<br />CASTLE ROCK NORTH. COLO.
<br />NE/" CASTLE ROCK 15' QUADRANGLE
<br />N3922 5 W10445j7 5
<br />Base by U.S. Geological Survey
<br />1965
<br />
<br />1973
<br />
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