FLOOD07048

• County: Summit
• Basin: Colorado Mainstem
• Title: U.S.G.S. Floodprone Quadrangle Maps - Dillon Quadrangle
• Date: 1/1/1970
• Prepared By: USGS
• Floodplain - Doc Type: Drawing/Map

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UNITED STATES
DEPARTMENT OF THE INTERIOR
GEOLOGICAL SURVEY

. MAP OF FLOOD-PRONE AREAS

DILLON QUADRANGLE
COLORADO
7.5 MINUTE SERIES (TOPOGRAPHIC)
NE/4 OIL-l.ON IS' aUAOR.4.NOl.E

106.07' 30"
39045'

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39037' 30" -
106007'30"

~, Approximate boundaries of flood-prone a:;.eas are shown on this map. There is, on the avera~e,
~~~'j~ alxmt 1 chance in 100 that the designated areas will be inundated in any year. This information is
..\p.\~~ \' important to public agencies and private citizens concerned with future land developments.
\. ....1. The flood~prone areas have been delineated through use of readily available information on past
floods rather than from detailed field surveys and inspections. In general, the delineated areas are
for natural conditions and do not take into consideration the possible effects of existing or propo8ed
flood control structure8 except where thoge effects could be evaluated. Flood areas have been iden-
tified for: (1) urban areas where the upstream drainage basin 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 U8e 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, eco-
nomic studies, or formulation of land-use regulations. Such detailed information may be obtained
from the U.S. Geological Survey, other Federal agencies, or State,local, and private agencies.

PREPARED BY U. S. GEOLOGICAL SURVEY
1978

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39.37'30'
'14"'(. 106.00'

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(FRISCO) R n w
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,SCALE 1:24000
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EXPLANATION

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1000 0
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10Cl0 2(X)() 3000 4000 5000 6000 7000 fEET
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Flood boundaries were estimated from:
Regional stage-frequency relations.

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I KilOMETER

CONTOUR 'NTERVAL 40 FEET
DATUM 1$ MEAN SEA LEVEL

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DILLON, COLO.

QUADRANGLE LOCATION

NEJ4 DII.LON 15' QUADRANGLE
N3937 .5-W10600/7 ,5
Base by U.S. GeoloSlcal Survey
. 1970

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