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<br />UNITED ST NrES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />
<br />MAP OF FLOOD-PRONE AREAS
<br />
<br />THOMPSON ARROYO QUADRANGLE ",t:.i
<br />COLORADO ~~~
<br />'0
<br />7,5 MINUTE SERIES (TOPOGRAPHIC)' ,0
<br />R.54W. R.53W. 1641 103022'30"
<br />38'00'
<br />
<br />(2 T.23S
<br />
<br />. .,.,
<br />
<br />
<br />.
<br />
<br />II
<br />
<br />490 000
<br />FEET
<br />"06
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<br />2580000 FEET
<br />
<br />'34
<br />
<br />'38
<br />
<br />640 R. 54 W. R. 53 W.
<br />
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<br />103' 22'30"
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<br />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 />important tb 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 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 2SO 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 land~use regulations. Such detailed information may be obtained
<br />from the U.S. Geological Survey, other Federal agencies, or State,local, and private agencies.
<br />
<br />1
<br />F.
<br />
<br />SCALE 1:24000
<br />~ 0
<br />~ =r 1_ __ .. .. _=
<br />1000 0 1000 2{)()Q 3000 4000 5000 6000 7000 FEET
<br />~..,-l=i_ ~ :I. ~ -.r.::::: J
<br />I ~ 0 1 KllQM(TER
<br />t=:i_ f~~ .
<br />CONTO,UR INTERVAL 10 FEET
<br />DATUM IS MEAN SEA LEVEL
<br />
<br />1 MilE
<br />
<br />EXPLANATION
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<br />Flood boundaries were estimated from:
<br />Regional stage-frequency relations.
<br />
<br />EJ
<br />
<br />THOMPSON ARROYO, COLO,
<br />N3752.5-W10322.5/7.5
<br />Base by U.S. Geological Survey
<br />1966
<br />
<br />'1
<br />
<br />QUADRANGLE LOCATION
<br />
<br />PREPARED BY U.S. GEOLOGICAL SURVEY
<br />197&
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