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<br />FLOOD-PRONE AREAS
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<br />LAMAR WEST QUADRANGLE
<br />COLORADO
<br />7 5 !MINUTE SER\ES (TOPOORAPHIC)
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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />
<br />MAP OF
<br />
<br />102"45'
<br />38"07'30"
<br />
<br />,
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<br />(LAMAR I: /25 000) I
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<br />AND 'J r no" LA:~A'~' 'FEET
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<br />The purpose of the flood-prone area maps is to show to administrators, planners, and
<br />engineers concerned with future land developments those areas that are subject to flooding.
<br />The U.S. Geological Survey was requested by the S9>th 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 lossep When detailed infonnation, such as that contained in the flood-hazaro
<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 />-l-
<br />
<br />o
<br />
<br />1 MILE
<br />
<br />EXPLANATION
<br />
<br />1000 0
<br />0---1>----<>----<
<br />
<br />6000 7000 fEET
<br />,
<br />
<br />Flood boundaries were estimated from:
<br />Regional stage-frequency relations.
<br />
<br />1000
<br />
<br />2000
<br />
<br />3000
<br />
<br />4000
<br />
<br />5000
<br />
<br />o
<br />
<br />1 KILOMETER
<br />
<br />B
<br />
<br />LAMAR WEST, COLO.
<br />Base by U.S. Geological Sur....ey
<br />
<br />1
<br />~
<br />
<br />.5
<br />0----< .....---.
<br />
<br />0--------0 0----<
<br />
<br />CONTOUR INTERVAL 10 FEET
<br />DATUM IS MEAN SEA LEVEL
<br />
<br />QUADRANGLE LOCATION
<br />
<br />1952
<br />
<br />1970
<br />
<br />-
<br />
<br />-
<br />
<br />7267
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