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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 />im}Xtrtant to 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 250 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, Tf:'commended 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 Mtudies, or formulation of land-ust" rt"li!'ulation~. Su(':h npt.R.i1pn infn,.m~t;nn m~'" ~'" nht<>;"..,tl
<br />
<br />'67
<br />
<br />'68
<br />
<br />'73
<br />
<br />274 R 92 W, R, 91 W
<br />
<br />'76""""r.
<br />
<br />40022'30"
<br />107- 37'30"
<br />
<br />"P'Vtb~
<br />+' \-1
<br />\"P't1~
<br />."
<br />
<br />1
<br />-
<br />
<br />J
<br />
<br />SCALE 124000
<br />o
<br />
<br />1000 . 0
<br />~-
<br />
<br />1000
<br />
<br />'000
<br />
<br />3000
<br />
<br />,
<br />,
<br />'Ok)
<br />
<br />I MILE
<br />
<br />EXPLANATION
<br />
<br />"so
<br />"'-;.
<br />~<S''"('
<br />. ;-
<br />"\S'o.-y
<br />~ ~
<br />
<br />,
<br />
<br />5000
<br />
<br />6000
<br />
<br />7000 FEET
<br />
<br />1 ; 0
<br />~= ______.....-.... 0----0
<br />
<br />] KILOMETRE
<br />
<br />Flood boundaries were estimated from:
<br />Regional stage-frequency relations.
<br />
<br />CONTOUR INTERVAL 40 FEET
<br />DOTTED LINES REPRESENT 20.F'On CONTOURS
<br />NATIONAL GEODETIC VERTICAL D~UM OF 1929
<br />
<br />G
<br />
<br />ROUND BOTTOM, COLO.
<br />
<br />PREPARED BY THE U.S. GEOLOGICAL SURVEY
<br />
<br />QUADRANGLE LOCATION
<br />
<br />1978
<br />
<br />N4022.5-WI0737.5/7.5
<br />Base by U.S. Geological Survey
<br />1966
<br />
|