FLOOD10241

• County: Arapahoe
• Community: Arapahoe County and Incorporated Areas
• Basin: South Platte
• Title: FIS - Arapahoe County and Incorporated Areas - Volume 1
• Date: 8/16/1995
• Prepared For: Arapahoe County
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

the existing Flood Insurance Studies for Aurora, Cherry Hills
Village, Columbine Valley, Englewood, Greenwood Village, Littleton,
and Sheridan (References 2 through 9, respectively).

The hydrologic and hydraulic analyses for portions of First, Piney.,
Murphy, Lone Tree, Happy Canyon, Cottonwood and Little Creeks and
Lee Gulch were performed by J.F. Sato and Associates, for the
Federal Emergency Management Agency (FEMA), under Contract No. EMW-
84-C-1631. This work was completed in August 1985 (References 10,
11, 12, 13, 14, 15, and 16).

The hydraulic analyses for a portion of Cherry Creek extending from
Cherry Creek State Recreation Area to the Arapahoe Douglas County
line were performed by Greiner Engineering, as reported in River
~ Development. Letter of Map Revision. Arapahoe County. Colorado,
(Reference 17).

The revised hydraulic analyses for
West Tollgate Creeks were performed
Engineering, and the City of
(References 18, 19, 20, 21, and 22).

portions of East Tollgate and
by Merrick and Company, Greiner
Aurora Engineering Division

The hydraulic analysis for a portion of Unnamed Creek (Tributary to
West Toll Gate Creek) was performed by Holland Corporation
(Reference 23).

The hydrologic study of the South Platte River, from Chatfield Dam
to the corporate limits of the City and County of Denver, was
prepared by Merrick and Company, under contract to the Colorado
Urban Drainage and Flood Control District (UDFCD), and was
completed in May 1983.

The hydraulic analyses for the South Platte River, from the
corporate limits of the City and County of Denver, upstream to the
U.S. Army Corps of llngineers (COE) Channel Improvement Project,
were performed by Wright Water Engineers, under contract to UDFCD,
and were completed in September 1985. The hydraulic analyses of
the COE Channel Improvement Project were also performed by Wright
Water Engineers under contract to UDFCD (completed in September
1987). The hydraulic reanalyses of the South Platte River, from
the COE Channel Improvement Project (Fairway Lane) upstream to the
Chatfield Dam, were based on the COE September 1979 hydraulic
computer model, using the discharges determined by the May 1983
Merrick hydrologic study and was carried out by the FEMA Technical
Evaluation Contractor, in November 1987.

1.3 Coordination

The Arapahoe County
corporate boundary
Conferences were held
July 24, 1975. The
original study of
September 16, 1975.

Planning Department supplied zoning and
maps for areas throughout the county.
with the County staff on June 5, July 15, and
final cOllllluni ty coordination meeting for the
the unincorporated areas was held on

2