FLOOD04007

• County: Rio Blanco
• Community: Meeker
• Stream Name: White River, Sulphur Creek
• Basin: Yampa/White
• Title: Floodplain Information Report
• Date: 6/1/1977
• Prepared For: Meeker
• Prepared By: Merrick & Company
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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peak floods on the White River consistent with regional data.

On Sulphur Creek and Sanderson Heights. no stream gaging records were

available. Because of the size and altitude of the basins. it was assumed that

floods flows would be caused primarily by rainfall from thunderstorms. For both

Sulphur Creek and Sanderson Heights. synthetic flood hydrographs were

developed according to the U.S.D.A. Soil Conservation Service procedure

for determining peak flows in Colorado (Reference 4). This procedure

requires the use of 24-hour rainfall values Which were obtained from the

National Weather Service (Reference 5).

The 10-. 50-. and 100-year peaks flows determined by the S.C.S.

method for Sulphur Creek and Sanderson Heights Drainageway were plotted

on probability paper. see Figures 2 and 3. To determine the 500-year flood.

the Probable Maximum Flood and the flood using "Assumption B" (Reference 3)

were also plotted to establish the upper limit and to check the reasonableness of

the magnitude of the 100-year flood. On Sulphur Creek. the 10-year. 50-year

and 100-year floods were computed using 24-hour rainfall values for the May-

October season to establish the trend for the lower frequency floods. These

values were also plotted on Figure 2 and the dashed line represents the discharge-

frequency relationship for Sulphur Creek.
Detailed descriptions. data and computations of the hydrologic techniques

used for the White River. Sulphur Creek. and Sanderson Heights Drainageway

are in the Technical Addendum to this report.

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