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<br />7254
<br />
<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />
<br />MAP OF FLOOD-PRONE AREAS
<br />
<br />DURANGO EAST QUADRANGLE
<br />COLORADO-LA PLATA CO.
<br />7.5 MINUTE SERIES (TOPOGRAPHIC)
<br />
<br />414QOOOm N.
<br />
<br />~ ~fLVERTON11~.J MI H5B I V NE SE/4 DURANGO 15' QUADRANGLE
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<br />37;07"52'30' l~ \ ~~~~~'AL~~~f~~S 59 "" 1147 '48 '1320000 FEET I 5a 1149 "50 1151 R.9 W. '52 47'30' R.8 w. 1'53 ' 154000..[.1 . 'N"R'oF G'O'OG'C^""~'" W^S"'NG'ON.D c. .lO7"4~?"15'
<br />
<br />The purpose of the flood-prone area maps is to show to administrators, planners, and SCALE 1:24000
<br />engineers concerned with future land developments those areas that are subject to flooding. t 0
<br />The U.S. Geological Survey was requested by the 89th Congress to prepare these maps as
<br />expressed in House Document 465. The flood-prone areas have been delineated by the
<br />Geological Survey on the basis of readily available information.
<br />Flood-prone area maps were delineated for those areas that meet the following criteria:
<br />(1) Urban areas where the upstream drainage area exceeds 25 square miles, (2) rural areas
<br />in humid regions where; the upstream drainage. area exceeds 100 square miles, and (3) rural
<br />areas in semiarid regions where the upstream drainage area exceeds 250 square miles.
<br />The flood-prone areas shown on this map have a 1 in 100 chance on the average of being
<br />inundated during any year. Flood areas have been delineated without consideration of
<br />present or future flood-control storage that may reduce flood levels.
<br />Flood-hazard reports provide the detailed flood information that is needed for economic
<br />studies, for formulating zoning regulations, and for setting design criteria to minimize
<br />future flood losses. When detailed information, such as that contained in the flood.hazaro
<br />reports, is required, contact the U.S. Army, Corps of Engineers; the U.S. f';eological Survey;
<br />or the Tennessee Valley Authority in the areas of their jurisdiction.
<br />
<br />~
<br />
<br />107"50'30'
<br />37"22'30" J~.
<br />
<br />4139
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<br />9
<br />
<br />1 MILE
<br />
<br />EXPLANATION
<br />
<br />I
<br />I
<br />I
<br />
<br />1000 0
<br />>---I >--< >--<
<br />
<br />1000
<br />
<br />2000
<br />
<br />3000
<br />
<br />4000
<br />
<br />5000
<br />
<br />6000
<br />
<br />7000 FEET
<br />,
<br />
<br />Flood boundaries were estimated from:
<br />Regional stage-frequency relations.
<br />
<br />) 5
<br />............. ............. h------< >---< >---<
<br />
<br />o
<br />
<br />I KILOMETER
<br />
<br />CONTOUR INTERVAL 40 FEET
<br />DOTTED LINES REPRESENT 20.FOOT CONTOURS
<br />DATUM IS MEAN SEA LEVEL
<br />
<br />EJ
<br />
<br />DURANGO EAST, COLO.
<br />
<br />QUADRANGLE LOCATION
<br />
<br />Base by U.S. Geological Survey
<br />
<br />1963
<br />
<br />1970
<br />
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