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Last modified
1/26/2010 10:09:17 AM
Creation date
10/5/2006 4:19:59 AM
Metadata
Fields
Template:
Floodplain Documents
County
Statewide
Community
Malta Montana
Basin
Statewide
Title
Reconnaissance Report Flood Control for Milk River at Malta Montana
Date
12/1/1991
Prepared For
US Army Corps of Engineers
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />II <br />I <br />I <br />I <br />I. <br />I <br />I <br />I <br />I <br />I <br />I I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />magnitude of flood dallage.. M .uch, flood _rgency prep.redn... pro- <br />vide. only . low degr.e of prot.ction. By it..lf, thia ....ur. w.. <br />.Uminated bec.un it would not provide. high degr.. of flood prot.ction. <br />How.v.r, flood ..ergency pr.p.r.dn... could b. included with oth.r ..... <br />urea .. p.rt of . compreh.nsiv. flood control plan. <br /> <br />STltUCTOlAL IlEASUllES <br /> <br />RESERVOIRS <br />The Milk Riv.r flood plain i. extr...ly wid. and fl.t through mo.t <br />of it. length. TU. prohibita an effective .1Ib.n1cII.nt ti.-off and would, <br />therefore, require .xtr.m.ly long embenlannt.. A .yate. of tributary clam. <br />upstrellll froll Kalta would still leave a considerable drainage area uncon. <br />trolled. Th. existing Fresno DIlII offers .011. flood control to Malta. It <br />is located 95 lIiles upstream and regulates one-third of the Milk Riv.r <br />drainage basin at Malta. R.servoirs w.r. .liainat.d froll furth.r .tudy <br />because of the econollic infeasibility and pot.ntial envirol1ll8ntal impacta. <br /> <br />CHANNEL MODIPICATIOR/IMPRO"''''''''nIS <br />Thi. ...sur. would require chann.l enlarg_nt, .0118 .traight.ning, <br />training l.vee., and grade control .tructur... Modifications would al.o <br />be necessary on both the U.S. Highway 2 and the BNRR bridg... \lith a <br />channel improvement lIeasure at Malt., there would be a need to relocate <br />some buildings and utilities. Technically, this would not be . viable <br />measure because the existing channel is deeply entrench.d through Malta <br />and currently i. experiencing extre.e .loughing of the riv.r .mban1cllent. <br />at several locations. Channel cutoffs would steepen the channel gradient <br />and encourage erosion. This measure was eliminated fro. further consider- <br />ation because of potential environsental 1IIpact., lack of effectiveness, <br />engineering difficulties, and high costa. <br /> <br />23 <br />
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