FLOOD01589

• County: Clear Creek
• Community: Georgetown
• Stream Name: Clear Creek, South Clear Creek
• Title: Flood Hazard Identification Report
• Date: 2/1/1987
• Prepared For: Georgetown
• Prepared By: CWCB
• Floodplain - Doc Type: Floodplain Report/Masterplan

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STUDY AREA DESCRIPTION

Drainage Basin Characteristics

Clear Creek and South Clear Creek (also known locally as
Leavenworth Creek) both flow through Georgetown in narrow channels with
fairly steep slopes. Headwaters of Clear Creek are located near the
Continental Divide with the highest point in the basin at 14.270 feet
(Grays Peak). Clear Creek at Georgetown Lake (at the downstream end of
Georgetown) has a water surface elevation of approximately 8445 feet.
The creek traverses easterly for most of its length until it reaches
Georgetown, where it flows northerly. Clear Creek has no major
tributaries with the exception of South Clear Creek, which has its
confluence in the Georgetown corporate limits. The drainage area of
Clear Creek at the Georgetown Lake spillway, which is near Georgetown's
downstream corporate limit, is 81 square miles and upstream of the
confluence of South Clear Creek the drainage area is 47.5 square miles
(see Basin Map, Plate 1).

Headwaters of South Clear Creek basin are located near the
Continental Divide with the highest point in the basin at elevation
13,850 feet (Mount Edwards). South Clear Creek travels northerly from
its headwaters to its confluence with Clear Creek within Georgetown's
corporate limits. South Clear Creek has one major tributary- Leavenworth
Creek which has its confluence with South Clear Creek approximately one
mile upstream from Georgetown's upstream corporate limit. The drainage
area of South Clear Creek to its confluence with Clear Creek is 30.7
square miles.

Study Reach Description

The study reach along Clear Creek extends from approximately 500
feet downstream from Georgetown's upstream corporate limit to
Georgetown's downstream corporate limit (at Georgetown Reservoir).
Mapping limitations prevented the study from extending to the upstream
corporate limit. This reach covers a length of 1.8 miles. There is
extensive development along the creek through town.

The study reach along South Clear Creek extends from approximately
100 feet downstream from Georgetown's upstream corporate limit to its
confluence with Clear Creek. This reach covers a length of 0.8 miles of
which all is in the corporate limit for Georgetown. There is extensive
development along the creek through the town.

The study reaches were included in the Federal Insurance
Administration's Flood Hazard Boundary Map (FHBM) for the Town of
Georgetown (Community No. 080035, map effective January 2, 1980). The
FHBM is shown in Exhibit 2. The FHBM was derived using detailed methods;
however, as previously explained, the input to the water surface computer
program was lost, and thus FIA voided the results of the detailed study.
The corporate boundary shown on the FHBM is incorrect according to Lee
Woolsey, the Town Administrator. Exhibit 3 shows the correct corporate
limit.

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