FLOOD02518

• County: Weld
• Basin: South Platte
• Title: U.S.G.S. Floodprone Quadrangle Maps - Platteville Quadrangle
• Date: 1/1/1950
• Prepared By: USGS
• Floodplain - Doc Type: Drawing/Map

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UNITED STATES
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GEOLOGICAL SURVEY

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11 I' 40.15'

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104"52'30" '11 '11 2180000 FEET
Approximate boundaries of flood-prone areas are sho"wn on this map. There is, on the
aVNaR'{', about 1 chance in 100 that the designated areas will be inundated in any year.
This information is important to public ag-encies and private citizens concerned with futUff'
land developments.
Tht' flood-prone art'as have been delineuted through use of readily available informa-
tion on past floons rather than from detailed field surveys and inspections. In ~eneral,
the delineated ar~as are for natural conditions and do not take into consideration the P()S~
sible f'ffects of existing or propo~ed flood control structures except where those effects
could be evaluated. Flood areas have been identified for: (1) urban art>as where the up~
stream drainage basin exceeds 2S square miles. (2) rural areas in humid regions where the
upstream liminage basin exceeds 100 square miles, (3) rural areas in semiarid regions \Il,-'here
the upstream drainage basin exceeds 250 square miles, and (4) smaller drainage basins,
depending on topography ami potential ust.~ of the flood plains.
The 89th Congress, in House Document 465, recommended the prf'paration of flood-prone
area maJ}R to assist in minimizing flood 1088(>/,\ by quickly identifying the areas of potential
flood hazards. ~ore lietailed flood information ma~)' he required for other purposes such
as structural designs, economic studit.s, or formulation of land.use rf'gulations. Such de-
tailed information may be obtained from the U.S. Geological Survey, other Federal agencies.
or State, local, and privatI:' agencies.

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(FORT LUPTON)
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FORT LUPTON 28 MI, 517
DENVER (CIVIC CENTER) 40 MI

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EXPLANATION

;000
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60Qu
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1 MILE
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1000 fHl
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Flood boundaries were estimated from:
Regional stagp.frt>qui:>ncy relations,

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CONTOUR INTERVAL 10 FEET
OA'TUM !S MEAN SEA LEVEL
This work was performed by the U.S. Geological Survey for
and funded by the Federal Insurance Administration,
Department of Housing and Urban Development, to meet
provisions of the NatIonal Flood Insurance Act of 1968.

EJ

PLATTEVILLE,COLO.

N 4007 .5-W 10445/7.5
Base by U.S. Geological Survey
1949
PHOTOREVISEO 1969

QUADRANGLE LOCATION

1974