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FLOOD03369
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Last modified
1/29/2010 10:15:22 AM
Creation date
10/4/2006 11:41:20 PM
Metadata
Fields
Template:
Floodplain Documents
County
Prowers
Bent
Otero
Community
Southeastern Colorado
Stream Name
Arkansas River
Basin
Arkansas
Title
Post Flood Assessment Report Arkansas River
Date
9/15/1999
Prepared For
State of Colorado
Prepared By
US Army Corps of Engineers
Floodplain - Doc Type
Flood Documentation Report
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<br />regWnal management approach to the problem was essential to fInding a solution. <br /> <br />The PP ACG Board of Directors decided to create a public forum for continuing work on the <br />Fountain Creek Watershed Project. The PPACG formed the Fountain Creek Watershed Forum <br />(FCWF) in conjunction with the Pueblo Area Council of Governments (PACOG). Elected <br />offIcials from the PPACG and PACOG provide the leadership and form the Policy Development <br />Committee. The technical staff from cities and counties and other interested agencies and <br />affected parties form the Fountain Creek Watershed Forum Technical Advisory Committee <br />(FCWFTAC). The FCWFTAC has been meeting since November 1998. At the advice of the <br />FCWFT AC, the FCWF began exploring the possibility of securing another grant from the EP A. <br />The grant will be used to generate a comprehensive, regional watershed management plan. <br /> <br />In conjunction with this proposed EP A funded study effort, the FCWF has expressed interest in <br />pursuing a Feasibility Study by the Corps of Engineers through re-activation of an existing study <br />authority. As a result of the April 29, 1999 flood, many affected parties along Fountain Creek <br />were able to obtain immediate streambank erosion protection through the Natural Resources <br />Conservation Service (NRCS). The NRCS Emergency Watershed Protection program allows <br />restoration and protection of streambanks threatening private and public interests. Nevertheless, <br />the overall challenge for the FCWF is enormous in scope and will likely require a combined <br />effort on the part of the Corps of Engineers, local government agencies and other Federal <br />agencies. <br /> <br />In anticipation of a concerted regional effort, the City of Colorado Springs, EI Paso County, City <br />of Pueblo and Pueblo County are working toward a regional stormwater services project to <br />develop the organizational, operational, legal, and fInancial framework of a regional stormwater <br />and flood control organization. This may ultimately evolve into an entity which can sponsor a <br />comprehensive, basin-wide, Federally cost shared flood control improvement project. <br /> <br />Arkansas River <br /> <br />Development within the Arkansas basin downstream of Pueblo has not been as signifIcant as the <br />development along the Fountain Creek and tributaries. The increased flow and associated <br />erosion and sediment transport from Fountain Creek has created aggradation within the Arkansas <br />River channel. This aggradation and increase in base stream flow has resulted in increased <br />flooding from flows that occur at relatively frequent intervals. This appears to be largely the case <br />at La Junta, Colorado. Local officials report that the Arkansas River channel bed in La Junta has <br />increased in elevation 16 feet over the last 30 years. <br /> <br />Aggradation in the river channel has become problematic from the standpoint of local <br />stormwater drainage. In 1993, the Corps of Engineers conducted a hydrologic investigation for <br />La Junta as part of an initial appraisal for a Section 205 Small Flood Control Project. The <br />investigation was focused on the First Street Stormdrain between the King and Anderson <br />Arroyos. The drainage area and flow quantity were below the policy threshold for Corps of <br />Engineers projects, but it was clear that sedimentation has adversely affected drainage to enter <br /> <br />Post Flood Assessment Report <br /> <br />36 <br /> <br />Chapter 5 - Flood Risk Assessment <br />Draft Revised 09/09/99 <br />
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