FLOOD04795

• Designation Number: 98
• County: Garfield
• Community: Glenwood Springs
• Stream Name: Roaring Fork River & Colorado River
• Basin: Colorado Mainstem
• Title: Floodplain Information Report - Roaring Fork River & Colorado River, Glenwood Springs, CO
• Date: 11/1/1977
• Designation Date: 3/1/1978
• Prepared For: Glenwood Springs, Garfield County, CWCB
• Prepared By: Gingery Associates, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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I;LOSS^rlY

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Il.]ei<w"~_cr ";ffr,cl - Thr. r~sp. in surfLwu (.tt:vilLion of Flowin'l
----wClter upstream (rom and <15 " resul t n[ an obstruction
to flow.

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B~sin - An enclosec or partly enclosed water arc a or de-
pression on the surface of the earth.

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Channel - A natural or artificial watercourse with dnfinite
bed and banks to confine and convey flowing water.

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Cloudburst - ^ sudden and extremely heavy downpour of rain
that is small in aerial extent; of short duration; and
may be accompanied by lightening, thunder, and strong
gusts of wind.

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Designated Flood Plain - The area designated as a flood plain
by off~cial action of the board of county commissioners
of city council with prior concurrence of the Colorado
W~ter Conservation Board.

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Flood - ^n overflow on lands not normally covered by water
~nd that arc used or usable by man. Floods have two
essential characteristics; the inu~dation of land is
temporary. and the land is adjacent to and inundated
by overflow from a river or stream or an ocean, lake
or other body of standing water.

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Normally a flood is considered as any temporary rise
in streamflow or sta~e, but not the ponding of surface
water, that results in significant adverse effects in
the vicinity. Adverse effects may include damages
from overflow of land areas, temporary backwater
eff~cts in sewe~z and local drainage channels, crea-
tion of unsanitary conditions or other unfavorable
situations by deposition of materials in stream
channels during flood rccissions, us~ of ground
water coincident witl". increased stre"mflo;.,', and other
problems.

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Flood, 100 Xear - A type of flood, including the water sur-
face clevativn and territorial occupation thcr",of, which
C,ll1 be expected to occur at any time in a given area
based UpOll recorded historical precipitation and other
valid data, but with an average statistical one percent
chance of being equalled or e~ceeded during anyone year.
The term is used interchangeably with a one percent
flood or Intermediat~ Regional Flood. (See definition
for Intermediate Regional Flood).

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