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FLOOD06987
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Last modified
1/25/2010 7:10:32 PM
Creation date
10/5/2006 2:40:47 AM
Metadata
Fields
Template:
Floodplain Documents
County
Arapahoe
Community
Littleton
Stream Name
South Platte River
Basin
South Platte
Title
Floodway Analysis Report River Front Place Development
Date
4/1/1983
Prepared For
Littleton
Prepared By
Resource Consultants
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />that the 12,500 cfs would be sufficient based upon current drainage planning <br />in this area. <br /> <br />The second discrepancy within the FIA study is the floodway limits. <br /> <br /> <br />Only one river cross section was utilized in this area to determine the <br /> <br /> <br />floodway limits. Since one cross section does not adequately represent the <br /> <br /> <br />topography in the area, additional cross-section information was studied <br /> <br /> <br />and indicated a significant change in the floodway limits from those <br /> <br /> <br />published in the FIA study. <br /> <br /> <br />As a result of this more detailed analysis, revised floodway limits <br /> <br /> <br />were determined as shown in Fig. 1. Revised floodwater elevations were <br /> <br /> <br />also computed, as shown in Table 1. The water-surface profile is plotted <br /> <br /> <br />in Fig. 11 and compared to the profile from the FIA study. The appendix to <br /> <br /> <br />this report contains the output of computer runs to determine the floodway <br /> <br /> <br />limits. <br /> <br />CONCLUSIONS <br /> <br />It is requested that a Special Exception Permit be approved for <br /> <br /> <br />development of the River Front Place property using the revised floodway <br /> <br /> <br />limits, as shown in Fig. 12. Also, it is requested that the revised <br /> <br /> <br />floodway information should be presented to the Federal Emergency <br /> <br /> <br />Management Administration (FEMA) for amending the flood-plain and floodway <br /> <br /> <br />mapping in this area. <br /> <br /> <br />It is further requested that after the Army Corps of Engineers flood <br /> <br /> <br />control improvements are constructed in this area, development will be <br /> <br /> <br />allowed to the limits of the proposed flood control right-of-way. <br /> <br /> <br />The currently planned phasing allows development to occur within the <br /> <br /> <br />flood-plain areas as approvals are obtained as outlined above. <br /> <br />9 <br /> <br />R€~()U~€ C()N~UIT~NT~ INC <br />
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