FLOOD10499

• County: Fremont
• Community: Canon City
• Stream Name: Fourmile Creek
• Basin: Arkansas
• Title: Canon City / Fourmile Creek Documents
• Floodplain - Doc Type: Correspondence

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1.

Limits of the 1 DO-year floodplain and floodway based on the design 100-
year flows for existing basin and channel conditions.

2.

I
Profiles of the bottom of the channel or thalweg, and the 10-, 25-, 50-,
100-, and 500-year water surfaces.

3.

Cross-section locations.

4.

Stream centerline (reference line) and stationing.

5.

A sufficient number of 100- year flood contours to enable reconstruction of
the 1 OO-year water surface profile to an accuracy of +/-0.5 feet.

. The ENGINEER shall produce plan view floodplain drawings plotted on 11" x 17"
sheets at a plotted scale of 1 inch = 400 feet. Profile sheets shall also be produced
and plotted on 11" x 17" sheets at a plotted scale of 1 inch = 200 feet (horizontal)
and 1 inch = 10 feet (vertical). Computed water surface profiles and profile plots
shall match within 0.5 feet of the NRCS study at cross-section 310.

. The ENGINEER shall prepare a bound one-volume written report summarizing the
study findings and analyses. The report shall be signed and sealed by the
registered professional engineer responsible for its contents. The report shall
include the new information produced from this STUDY and shall incorporate
pertinent information from the 1996 NRCS study. The report shall be compiled in
such a way that it will supersede, but will make reference to and give credit to, the
affected and revised portions of the NRCS study. This report is not intended to
supersede the entire NRCS study, but shall supplement and replace the revised
portions of it. The ENGINEER shall prepare a report that contains the following:

6. A one-page executive summary and table of contents with a list of figures,
maps, etc. A brief statement to clarify the scope and purpose of this study
and to present the obligations of the ENGINEER under this Agreement.

7. A summary of pertinent data or information obtained from the CITY, the
CWCS, the NRCS, and others.

8. A summary of the study area and watershed. Identify major basin
featured in the text and include a good quality basin map with identifiable
features and landmarks.

9. Related flood studies.

10. Flood history.

11. Summary of hydrologic analysis and results and their source. Include a
table of peak discharges with stream location, drainage area, and design
flows for the 10-, 25-, 50-, 100- and 500-year frequencies.
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