FLOOD01136

• Designation Number: 268
• County: Douglas
• Community: Parker
• Stream Name: Tallman Gulch Tributary No. 1
• Title: Flood Hazard Identification Report - Tallman Gulch Tributary Number 1
• Date: 12/1/1986
• Designation Date: 1/1/1987
• Floodplain - Doc Type: Floodplain Report/Masterplan

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INTERPRETATION AND USE OF REPORT

Flood Frequency and Discharge

Discharges listed in "Hydrologic Analysis" in this report
for the 10-, 50-, 100-, and 500-year frequencies. This
information can be used for planning and engineering of
improvements as well as for floodplain regulations.

are given
discharge
floodplain

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The 100-year flood can be expected to occur at any time in a given
area. Based upon recorded historical precipitation, land runoff
characteristics and other data, ther is a one percent chance that the
laO-year flood will be equalled or exceeded in anyone year. The
100-year flood is considered by CWCB and the Federal Insurance
Administration as the flood magnitude for which floodplains should be
designated for regulatory and improvement purposes. In Colorado, the
lOa-year floodplain is an area of state interest as defined in House Bill
104l-Section 24-60-101 of the Colorado Revised Statutes.

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Flood events rarer than the lOa-year flood event can
occur. Plans for land improvement adjacent to the l00-year
should consider the probability of flood damage.

and will
floodplain

Flood Elevations

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Plat2s 3 and 4 show L~e flood profile for Tallman Gulch Tributary
No.1. Plate 5 is a graphical display of the cross-sections and the
computed lOa-year flood elevations at each cross-section. Table 1 gives
a summary of pertinent data at each cross-section. The actual HEC-2
output is in the files of the Colorado Water Conservation Board. In case
of any question regarding lOa-year flood elevations, the flood profiles
should be consulted.

CO~ruNITY L~FOR~~TION:

AGENT AND BROKER INFORMATION:

Flood Insurance

The National Flood Insurance Program (NFIP) is a Federal program
that enables property owners to buy flood insurance at a reasonable,
subsidized cost. In return, communities are required to carry out
floodplain management measures to protect lives and new construction from
future flooding. Table 2 gives some NFIP rate information. Additional
information on the NFIP is available as follows:

Federal Emergency ~anagement Agency
Natural & Technological Haz~rds Division
Bldg. 710, Denver Federal Center
Box 25267
Denver, CO. 80225-0267
(tel. ao. :35-4830)

Mr. Jim Quinn
Computer Sciences Corp.
2801 Youngfield, suite 320
Golden, CO. 80401

(tel. no. 231-9911)

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