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FLOOD04543
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Last modified
1/25/2010 6:46:33 PM
Creation date
10/5/2006 12:44:04 AM
Metadata
Fields
Template:
Floodplain Documents
County
Statewide
Community
Harrison County, Iowa
Basin
Statewide
Title
California Bend Missouri River Fish and Wildlife Mitigation
Date
11/1/1994
Prepared For
US Army Corps of Engineers
Prepared By
Greenhorne & O'Mara, Inc.
Floodplain - Doc Type
Data (general)
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<br />'J <br />, <br />" <br />, <br />J <br />J <br />, <br />, <br />I <br />I <br />J <br />, <br />J <br />J <br />, <br />, <br />J <br />, <br />, <br /> <br />.~ <br />Ic-.o <br />- <br />"-......... <br /> <br />fll.-c <br /> <br />41'16 elll. 1('2- <br /> <br />cAUl'". ~.,4'!> (O(lnF!?,ND <br /> <br />GREENHORNf " O'MAR", INC. lIll SOUTH YAUCHN WAY sun 4lI ~ COlOlADO 10014 <br /> <br />S.pt.mber 12, 1994 <br /> <br />IIr. John Ileaus <br />U.S. Aray Corps of Engineers. O.ahs District <br />215 North 17th Street <br />Omaha, HE 68102.4978 <br /> <br />Dear John. <br /> <br />Ve have completed a preliminary assessment/analysis of the alternative. as <br />outlined in our revised Scope of Work and based on our past telephone <br />conversations. It is our understanding that the priaary goal of the California <br />Bend project is the enhancement of existing migratory vaterfowl habitat which <br />would include improvement of nesting, feeding, and resting habitat. This could <br />be accomplished by increasing aquatic bed/emergent wetland area and quality. and <br />maintaining appropriate water levels in the backwater areals). Secondary goals <br />include the restoration of riverine fish spawning, feeding. and rearing by <br />providing a hydraulic cOMection to the lIissouri River, and improvement of <br />management ability. <br /> <br />As a part of our evaluation and analysis, and at your suggestion, we contacted <br />IIr. Ed Weiner of the Iowa DNR to discuss the suitability of the site for creating <br />waterfowl habitat. IIr. Weiner expressed his concerns about the viability of the <br />alternatives under study. IIr. Weiner's concerns include the following. <br /> <br />o The large acreage of open water at both the De Soto National Wildlife Refuge <br />and the Tyson Island State Vildlife area may compromise the value of <br />converting the land use on California Bend from vegetated wetlands to open <br />water. <br /> <br />o Be feels it is unlikely that any created chutes on this site could replicate <br />the prechannelization croll-section (sandban, variable depths, etc.), and <br />therefore, their functional value would be miniaal. <br /> <br />o Diverting the alternate water supply to the backwater area could pOSlibly <br />introduce large sediaent loads to the site, thereby filling the ezisting and <br />proposed shallow water wetlands. Aho the voll.llle of water in the channel <br />would provide only minimal flushing of the wetlands. <br /> <br />o If a low level sill were built along the river to flood the south".st corner <br />of the lite, sediments entering the basin from the river would accWlulate <br />behind the sill and eventually fill the area. <br /> <br />1.HN1J'Ol1S, MIl A1\ANTA. GA AUIIOIA. CO...._ MIl DIAl/TH, GA f_A1I. VA ,...to<....... VA ~T.1llO <br />~ VA MIOWIC5IUIIG,'A OIIANDO,IlIA111CH, NC IIOCIMU.f, MIl T_A.1l WAlllOIlf,IllO WlST'AIM IfAOl, Il <br />
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