FLOOD09513

• County: Statewide
• Community: State of Colorado
• Basin: Statewide
• Title: Fountain River Survey Report
• Date: 1/1/1951
• Prepared For: CWCB
• Floodplain - Doc Type: Flood Documentation Report

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Upstream Flood Prevention, Fountain River - u. S. Forest Service

Mr. Rosa explained that the $tudies being presented considered principally
the program effect during maj or f~oods and were prepared in response to recom-
mendations of the subcommittee at, a previous meeting when the same program was
discussed. '

Considerable detail was presented shoWing the computed effect of watershed
treatment programs and small deteiltion dams on small plots for selected storJllll.
,

Mr. Martin pointed out that the program effect should be routed downstream
to points of interest rather than, showing an accumulated effect of small areas
at sites of original reduction. Mr. Martin also mentioned that such programs
could aggravate downstream flood <;:onditions. Mr. Rosa stated that although a
program of land treatment and smafl detention dams will greatly modify tributary
floods from local summer storms, small detention dams become relativelr iheffect-
ive in reducing major floods at dpwnstream points where the time of concentration
is several hours.'

General Kramer asked the status of the Fountain River program in light of
current Department of Agricultureipolicies and limitations on size of projects.
Mr. Rosa and Mr. Dorroh explained the present progr!!lIl limitations which would
probably necessitate reduction or , separation of plans for the Fountain River
area.

Mr. Redmond asked if copies of Mr. Rosa IS study were being made available
for further AWR work. Chairman G!ildersleeve stated that the subcommittee intends
to prepare a hydrology appendix for Colorado AIVR including all such studies.

Upstream Flaod Protection, Arkans~s River above Pueblo - U. S. Forest Service

Mr. Rosa presented the studies in considerable detail. In general, the pro.
cedures used were the same as for the Fauntain River area.

General Kramer asked the effect of the detention dams an local irrigation
ditch rights and noted that this area was not sufficiently developed to justify
large flood control measures. Mr,. Rosa painted out that there were only a few
minor structures involved on the tributary areas and that local damages from
summer storms were sufficient for, justification. There would be na material ef-
fect upon majar floods used for downstream justifications. The studies were
accepted as being an adequate informational basis for the hydrologic purposes
.of the subcammittee, with the understanding that the studies had not been subject
to departmental review.

Wolf Creek Reservair - Corps of Engineers

Mr. Martin explained the physical features of the flood cantrol reservoir
and discussed the protection provided. Mr. Redmond discussed alternate plans
Which were considered and discarded in favar of a ,flood contral reservoir which
would pravide downstream protection as well as local protection.