FLOOD04416

• Designation Number: 304
• County: Adams
• Community: Unincorporated Adams County
• Stream Name: Big Dry Creek, (ADCO), North area tributaries
• Basin: South Platte
• Title: Flood Hazard Area Delineation - Big Dry Creek, ADCO, North Area Tributaries
• Date: 7/1/1989
• Designation Date: 1/1/1990
• Floodplain - Doc Type: Floodplain Report/Masterplan

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E. FLOOD HAZARD DATA
Floodway widths, which represent the maximum limits of encroachment
into the floodplain, are tabulated and presented in Table IV-l as are
the limits of the 100-year floodplain. Table IV-2 summarizes the flows
and water surface elevations corresponding to the 10-, 50- and 100-year
storms. The appendix contains the FHAD drawings delineating the extent
of the IOO-year floodplain.

10.

II.

IV-5

REFERENCES

I.

Outfall Systems Planning: Big Dry Creek (ADCO) and Tributaries,
Muller Engineering Company, Inc., August 1987.

2.

Flood Hazard Area Delineation: Big Dry Creek (ADCO), Muller Engi-

neering Company, Inc., November 1986.

3.

Soil Survey for Adams County, U.S. Department of Agriculture, Soil
Conservation Service, October 1974.

4.

Soil Survey for Weld County, Southern Part, U.S. Department of
Agriculture, Soil Conservation Service, August 1982.

5.

Urban Storm Drainage Criteria Manual, Denver Regional Council of
Governments, Denver, Colorado, March 1969/with current revisions.

6.

Comprehensive Plan, City of Thornton, Colorado, adopted October
14, 1985.

7.

Colorado Urban Hydrograph Procedure, User Manual, Boyle Engineer-

ing Corporation, January 1985.

8.

Urban Drainage Storm Water Management Model, User Manual, Boyle
Engineering Corporation, March 1985.

9.

HEC-2 Water Surface Profiles, Users Manual, U.S. Army Corps of
Engineers, September 1982.

Aerial Photographs for Big Dry Creek North Area Tributaries Pro-
ject, Delta Aerial Surveys, Inc., Denver, Colorado, 1989.

Rules and Regulations for the Designation and Approval of Flood-
plains and of Storm or Floodwater Runoff Channels in Colorado,
Colorado Water Conservation Board, Denver, Colorado, December I I,
1987.