FLOOD08109

• County: Summit
• Community: Breckenridge
• Stream Name: Blue River
• Basin: Colorado Mainstem
• Title: Preliminary Flood Insurance Study
• Date: 6/30/1998
• Prepared For: Breckenridge
• Prepared By: FEMA
• Floodplain - Doc Type: Floodplain Report/Masterplan

8. Merrick and Company, Contour MaDs, Scale 1:1,200, Contour Interval
2 feet, Breckenridge, Colorado, June 1, 1971, and October 25, 1973

9. U.~. Department of Housing and Urban Development, Federal
Insurance Administration, Flood Insurance Study. SUmrrQt County.
Colorado (UnincorDorated Areas), December 16, 1980

10. U.S. Department of Housing and Urban Development, Federal
Insurance Administration, Flood Hazard Boundarv Man. Town of
Breckenridae. summit County. Colorado, Scale 1:9,600, 1976

11.

FIe Engineering Consultants, Inc., Drainaae Master Plan for the
Town of Breckenridae. Colorado. Drainaae ReDort, April 6, 1993

t

12. Federal Emergency Management Agency, Flood Insurance study. Town
of Breckenridae. Summit County. Colorado, December 1979

13.

Federal
Countv.

Emergency Management Agency, Flood Insurance
Colorado (Unincornorated Areas), November 2,

Study.
1994

Summit

9.0 REVISION DESCRIPTIONS

This section has been added to provide information regarding significant
revisions made since the original Flood Insurance Study was printed.
Future revisions may be made that do not result in the republishing of
the Flood Insurance Study report. To assure that any user is aware of
all revisions, it is advisable to contact the community repository of
flood-hazard data located at the Town of Breckenridge Engineering
Department, P.O. Box 168, Breckenridge, Colorado 80424.

9.1 First Revision

This study was revised on to incorporate detailed
flood-hazard information along Blue River Middle Branch and
Cucumber, Illinois, Jones, and Gold Run Gulches, and approximate
flood-hazard information along the Blue River Middle Branch split-
flow area in the vicinity of the Town of Breckenridge.

The hydrologic and hydraulic analyses for the restudy were
performed for the Federal Emergency Management Agency, by Flo
Engineering Consultants, Inc., under Contract No. EMW-92-C-3811.
In July 1997, Flo Engineering Consultants, Inc., submitted
information contained in a report entitled "Drainage Master Plan
for the Town of Breckenridge, Colorado, Drainage Report"
(Reference 11).

The results of the restudy were reviewed
Coordination Officer meeting held on
by representatives of
All problems raised at the meeting have
restudy.

at a final Consultation
and attended

been addressed in this

Hydrologic analyses were carried out to establish peak discharge-
frequency relationships for the flood-hazard areas. Regional
frequency analyses were conducted to develop peak discharges for
Blue River Middle Branch and Cucumber Gulch. The purpose of these
analyses was to determine if the values from previous studies were
still representative of peak discharges in the Blue River basin in
light of flow data available since those studies were conducted.
This methodology was found to be more representative for lower
return period flows on the major tributaries of events dominated

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