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<br />S\;D!I'D..H (S','IAED-ZfI, 3 Oct 67) 3rd Ir.d
<br />SUPZEC:r: LaG (;riil'.8.G Local Protection Froject, LUG Animas, Colorado,
<br />and Vi::~i!JitYJ Denign Hemore-..'1dum Nf). 1, Hydrology
<br />
<br />n~, Southwestern Division, Corps 0f Engineers, ~24 Commerce Street,
<br />o,...llas, Texas 75202 15 Nc.y 1968
<br />
<br />TO: District Engineer, Albu,,"uer'l.ue
<br />
<br />1. Resul ts of additional studies of water surface prOfiles throv..;h the
<br />~)J~o:Poaed levees furnished by rout,ing .Glip from your Hydraulics Section,
<br />have been used as a basis for the follcwing comments reBarding levee
<br />freeboard amount" above t.'-1e deaien \leter proflle (140,000 c1's).
<br />
<br />a. IIe aex-ee with your H;rdrauli" Section personnel ...'lat the S?F
<br />profile sh:1uld be uGed a3 a guide to indicate levee locations "..here 5:l"'cater
<br />than minimu~ freeboard i3 needed. This is also consistent Witil the Chief
<br />of Engineers comment contained in subparagraph a(2), preceding 20d Ind.
<br />
<br />b. !n order to prevent initial overtopping a<1d to minimize poss~~lc
<br />~ailu~e of levees ~p8t~eam from city develop~=ntR, it iQ suggested ~h~~
<br />conGicierat.1on be Biven to GettinG the levee grac1e::; 2-!eet g,bove the SPF
<br />profile fro:n the AT&S~'RR up3tream to station 0 f 00. !his o.e3ign wcultl
<br />provide for 'ouildup of head at the two bridge3. BaeD/ateI' effects !,'oove
<br />the bridges should take into account rea:lOnable e3tim.e.tcs of wat€:~Tr\:r
<br />opening restrictions due to debris which might lodge on the struct'_~l'e~,.
<br />
<br />c. A reasonable design for levee hei~ts do;mst"'ec.m from the rail-
<br />road bridGe appears to be 2-feet above the SPF profile immediately below
<br />the bridge "taperinG to 1 foot above the SPF at the 10..,,1' e!ld. ':'11i3 1;oul<i
<br />favor initicl overtopping at the dmmGtream lev,",,, reach.
<br />
<br />2. It is suggested that reco='~ndations regarding levee gradeG, pertinent
<br />;:ater level profiles, information regardin~ bacb/ater startin6 e.1.evatio::ls
<br />IJ.Ild coincident flo....s, and possible affects of John Martin Heser,oir be
<br />submitted as soon as possible to facilitate General Design Memor~ldum
<br />studies.
<br />
<br />FOR THE ACTU1a DIVISI~N ENGINEER:
<br />
<br />'--..,J"j
<br />,.~., .,/ l { //
<br />./.,. , ..' ~ /
<br />tc,,~,..., '-.~' '._ .,.:, ~I~~ _ __-1
<br />ASA V. SHAlmON
<br />Chief, Engineering Division
<br />
<br />Copies fiunished:
<br />CoD.'!:o-rs, Attu: ENGCH-&: (6)
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