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<br />MAP OF' FLOOD-PRONE AREAS
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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />
<br />LAZEAR QUADRANGLE
<br />COLORADO-DELTA CO,
<br />7.5 MINUTE SERIES (TOPOGRAPHIC)
<br />107"45'
<br />38<52'30"
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<br />107"5230'
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<br />-:r' Approximate boundaries of flood.prone areas 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 />....Y'- \,\ important to public agencies and private citizens concerned with future land developments.
<br />O'v~l>b\ 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 consideration 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 potendal 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 land-use regulations. Such detailed information may be obtained
<br />from the U .8. Geological Survey, other Federal agencies. or State, local, and private agencies.
<br />
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<br />EXPLANATION
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<br />Floexl boundaries.were estimated from:
<br />Regional stage-frequency relations.
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<br />CONTOUR INTERVAL 20' FEET
<br />NATIONAL GEODETIC VERTICAL DATUM OF 1929
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<br />. COLORAOO
<br />
<br />OUADRANGLE lOCATION
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<br />LAZEAR. COLO.
<br />N3845-W1Q745j7.5
<br />Base by U.S. Geological Survey
<br />1955
<br />
<br />PREPARED BY U.S. GEOLOGICAL SURVEY
<br />1978
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