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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />
<br />MAP OF FLOOD-PRONE AREAS
<br />
<br />105000'
<br />40007'30"
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<br />'0
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<br />FREDERICK QUADRANGLE
<br />COLORADO
<br />7.5 MINUTE SERIES (TOPQGRAPHIC)
<br />104052'30"
<br />40007'30"
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<br />Approximate boundaries of flood-prone are~ are shown on this map. There is, on the average,
<br />about 1 chance in 100 that the designated areas will be inundated in any year. This information is
<br />important to public agencies and private citizens concerned with future land developments.
<br />The flood-prone areas have been delineated through use of readily available information on past
<br />floods rather than from detailed field surveys and inspections. In general, the delineated areas are
<br />for natural conditions and do not take into com~ideration the possible effects of existing or proposed
<br />flood control structures except where those effects could be evaluated. Flood areas have been iden-
<br />tified for: (1) urban areas where the upstream drainage basin exceeds 25 square miles, (2). rural
<br />areas in humid regions where the upstream drainage basin exceeds 100 square miles, (3) rural areas
<br />in semiarid regions where the upstream drainage basin exceeds 250 SQUare miles, and (4) smaller
<br />drainage basins, depending on topography and potential use of the flood plains.
<br />The 89th Congress, in House Document 465, recommended the preparation of flood. prone area
<br />maps to assist in minimizing flood losses by Quickly identifying the areas of potential flood hazards.
<br />More detailed flood information may be required for other purposes such as structural designs, eco-
<br />nomic studies, or formulation of laml.use regulations. Such detailed information may be obtained
<br />from the U.S. Geo~ogical Survey, other Federal agencies. or State, local, and private agencies.
<br />
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<br />HRIOH rON 85 MI
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<br />SCALE 124000
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<br />1 MILE
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<br />EXPLANATION
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<br />1 KILOMETER
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<br />Flood boundaries were estimated f~om:
<br />Regional stage-frequency relations.
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<br />1000 , 0 1000
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<br />CONTOUR INTERVAL 10 FEET
<br />NATIONAL GEODETIC VERTICAL DATUM OF 1929
<br />
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<br />
<br />QUADRANGLE LOCATION
<br />
<br />FREDERICK. COLO.
<br />N400o-W 10452,5/7,5
<br />Base by U.S. Geolo~ical Survey
<br />1950
<br />PHOTOREVISEO 1969
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<br />PREPARED BY THE U.S. GEOLOGICAL SURVEY
<br />
<br />1978
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