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<br />GRAND JUNCTION QUADRANGLE
<br />COLORADO-MESA CO,
<br />7.5 MINUTE SERIES (TOPOGRAPHIC)
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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />
<br />MAP OF
<br />
<br />AREAS
<br />
<br />FLOOD-PRONE
<br />
<br />IOS037'30'
<br />39"07'30'
<br />
<br />liNE
<br />N POINTJ 711
<br />
<br />(
<br />
<br />
<br />4333000m.N,
<br />
<br />4332
<br />
<br />/
<br />
<br />T. I N
<br />
<br />~
<br />
<br />'5'6
<br />
<br />T.15 \
<br />.-- . '~;Drive In
<br />_ , Theater
<br />~ '~ I
<br />. ....--.'
<br />
<br />.328
<br />
<br />~
<br />
<br />4321
<br />
<br />39"00
<br />108"37'30' '06
<br />The purpose .:. W the flood-prone area maps is to show to admini8trato~. planners, ~nd
<br />engineers concerned with future land developments those areas that are subject to flooding.
<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 avaiJable 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 drainag~ 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 infonnation, such as that contained in the flood-hazard
<br />reports, is required, contact the U.S. Army, Corps of Engineers; the U.S. Geological Survey;
<br />or the Tennessee Valley Authority in the areas of their jurisdiction.
<br />
<br /> seA LE 1:24000
<br /> I 0
<br /> ,
<br />1000 0 1000 2000 3000 4000 5000
<br />~ ~ ~
<br /> 1 5 0
<br /> - - - - -
<br />
<br />I MILE
<br />
<br />EXPLANATION
<br />
<br />6000 7000 FEET
<br />,
<br />
<br />Flood boundaries were estimated from:
<br />Regional stage-frequency relations.
<br />
<br />1 KILOMETER
<br />
<br />CONTOUR INTERVAL 20 FEET B
<br />
<br />DOTTED LINES REPRESENT 10 FOOT CONTOURS . COLORADO
<br />DATUM IS MEAN SEA LEVEL
<br />
<br />GRAND JUNCTION, COLO,
<br />Base by U.S. Geological Survey
<br />
<br />QUADRANGLE LOCATION
<br />
<br />1962
<br />
<br />1970
<br />
<br />~'
<br />.. "
<br />~ ~~
<br />'\'00
<br />.' '"
<br />" Q
<br />,:/
<br />,,<-0
<br />
<br />7258
<br />
<br />026
<br />-
<br />
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