FLOOD00360

• County: Delta
• Title: U.S.G.S. Floodprone Quadrangle Maps - North Delta Quadrangle
• Date: 1/1/1955
• Prepared By: USGS
• Floodplain - Doc Type: Drawing/Map

7243

UNITED STATES
DEPARTMENT OF THE INTERIOR
GEOLOGICAL SURVEY

108'"0730"
38""52'30"

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1 280000 FEEl

NORTH DELTA QUADRANGLE
COLORADO-DELTA CO.
7.5 MINUTE SERIES (TOPOGRAPHIC)
108"'00"
38""52'30"

MAP OF

FLOOD-PRONE AREAS

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38"45' 1151 'J52 I 260 000 FEET
108"'073
Approximate boundaries of flood-prone areas are shown on this map. Thete is, on the
average, about 1 chance in 100 that the designated areas will be inundated in any year.
This information is important to public agencies and private citizens concerned with future
land developments.
The nood-prone areas have been deHneated through use of readily available informa-
tion on past floods rather than from detailed field surveys and inspections. tn general,
the delineated areas are for natural conditions and do not take into consideration the P08-
sible effects of existing or proposed flood control structures except where those effects
could be evaluated. Flood areas have been identified for: (1) urban areas where the up-
str~am drainage b'lsin exceeds 25 square miles, (2) rural areas in humid regions where the
upstream drainage basin exceeds 100 square miles, (3) rural areas in semiarid regions where
the upstream drainage basin exceeds 250 square miles, and (4) smaller drainage basins,
depending on topography and potential use of the flood plains.
. The 89th Congress, in House Document 465, recommended the preparation of flood-prone
area maps to assist in minimizing flood losses by quickly identifying the areas of potential
flood hazards. More detailed flood information may be required for other purPoses such
as structural designs, economic studies, or formulation of land-use regulations.' Such de-
tailed information may be obtained from the U.S. Geological Survey, other Federal agencies,
or State, local, and private agencies.

5' R. 96 W. '754 DELTA 0.7 MI. 755 (DEL TAl I '56 R. 95 W.
MONTROSE :n MI. .361 II NE
SCALE 1:24000
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1000 0 1000 2000 3000 4000 5000 6000 7000 FEET
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1 5 J 1 KILOMETER
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38"45'
108"00'

EXPLANATION

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Flood boundaries were estimated from:
Regional stage-frequency relations.

CONTOUR INTERVAL 20 FEET
DOTTED LINES REPRESENT IO.FOOT CONTOURS
DATUM IS MEAN SEA LEVEL
Prepared by the U.S. Department of the Interior,
Geological Survey, in cooperation with the
U.S. Department of Housing and Urban Development.
Federal Insurance Administration.

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NORTH DELTA, COLO.
N3845- WI0800/7.5
Base by U.S. Geological Survey
1962

QUADRANGLE LOCATION

1973