FLOOD03403

• County: Adams
• Community: Adams County Incorporated
• Basin: South Platte
• Title: FIS - Adams County Incorporated, Volume 1 of 3
• Date: 8/16/1995
• Prepared For: Adams County
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

A meeting was held in the City of Thornton on April 16, 1977, among
the study contractor, the FIA, and city officials to discuss the
preliminary results and study procedures.

A final community coordination meeting was held on July 25, 1977,
to discuss the results of the study, and was attended by personnel
of the study contractor, the FIA, and the City of Thornton. No
changes or corrections were required as a result of this meeting.

2.0 AREA STUDIED

2.1 Scope of Study

This Flood Insurance Study covers the geographic area of Adams
County, Colorado, including incorporated towns and ci ties, except
communities which fall within more than one county as described in
Section 1.1.

The streams studied by detailed methods were taken directly from
previous Flood Insurance Studies covering Adams County and
Incorporated Areas, and are shown in Table I (References 2 through
11) .

For streams
multi-county
Westminster,
described in
communities.

studied in detail and located entirely within the
communities of Arvada, Aurora, Broomfield, and
the flooding and hydrologic and hydraulic data are
separately published Flood Insurance Studies for these

The areas studied by detailed methods were selected with priority
given to all known flood hazards and areas of projected development
or proposed construction.

Streams studied using approximate methods include First, Second,
and Third Creeks, West Box Elder Creek, Kiowa Creek, Wolf Creek,
West Bijou Creek, Middle Bijou Creek, East Bijou Creek, Muddy
Creek, Brantner Gulch, Grange Hall Creek, Todd Creek, Lost Creek,
portions of Box Elder Creek, Wolf Creek, and Comanche Creek, Niver
Creek, Niver Creek Tributaries Land M, and the upstream portion of
Northfield Creek through the City of Thornton were also to be
studied in detail; but, after some preliminary calculations showed
the 100-year floodplain width to be less than 200 feet wide, the
FIA recommended a change from detailed to approximate study
methods. Clear Creek (Reference 12) and Little Dry Creek
(Reference 13), which were studied previously by the UDFCD through
the City of Westminster, were included as approximate study areas.

Approximate analyses were used to study
development potential or minimal flood
methods of study were proposed to, and
Adams County.

those areas having a
hazards. The scope
agreed upon by, FEMA

low
and
and

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