WSP07622

• File Number: 8273.100
• Description: Colorado River Basin Salinity Control - Federal Agencies - Bureau of Reclamation
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/1987
• Author: DOI BOR
• Title: Salinity Update - January 1987 - A Quarterly Report on the Colorado River Water Improvement Program
• Water Supply Pro - Doc Type: Publication

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Fi&ur~ I. - Salinity projections with and wo additional
controls.

hl~h f1o"'> for the pd~l rr:v. yeaH ha\C'
lemporanl) lo..err:d ~hnity le\r:b in the
~y>lem. An) delay ....\)uld impao;l pro8ram
I.:onlinuil) and "u'l\t' .erKlll. intc:rruption
III Ihe Jon~-lerm lmpr()\emenl of lrTl~a-
llun la':lhtle~ and on farm prOjt'>.:l\. a\
",ell a~ fe\uh in luture unreall,lK iunding
re'lue,C, from the ConlEre".
rhr: JeaM ro,[ 1n'6ImC'n! ..:ompulc:r
mvJd, de,eloped by RedamatlOn and
(olorado Stair: L'nl\er'll). ....iI.\ USN to
t'\...Juale proje..:r In\t',lmenl 1eH'j, Tht'
re'ult\, modifit"u \0 meet pwgram ne-cd,
dflJ cOntmully, 1\ an in,e;,lffienl of about

5498 million The associated construction
schedule' i~ ~ho'" n in figure ~.
The basm"'lde program mu~t be de\el-
opt"(! ~omidering the un~ertaintie~ of Im-
plementation in the te.:hmcal. sex:ial.
polit'cal. imtitutional, and Itgal arenas.
Local l:oncrrm and needs, management
of ITrl8atlon systems, and regional 1m-
pa..:t\ are in\"ohed in the final sele.:tion of
an Implementation schedule
The analysis i~ ba~ed on January 191't>
dala. Annual re\ Ie'" is needed 10 update
proJe~-t data, 10 re\lC'''' program obje~.
tlses to determme If lhe~ de,'iate 'Ignlfl-

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..:antly, and to <:onfirm the validity that
the in\estment level of S~l,l8 million ....ill
\atisf~ the program obje.:ti'C'o.

Major Findin~s

. The recommended plan ....Ill fully
salisfy the ~alt load redu..:lion obje~ti\'e
(1.09 million IOns per year by 2010)
and the pro8ram goal of maintaining
numeri~ ~nteria belo.... 879 mg/L at
Imperial Dam
. Total construclIon cost for the
program IS proje..:ted 10 be S~98
million, significantly less than estimale,
of $1.9 billion in 1l,l83. This S498
million iO\estment le\'el appears to heM
satisfy the remainmg long-term
requlfements ....ith least investment cost.
. To meet the program obj<<;tise and
goab, comtru..:tion of most of the
proie\:ts mu<;( be initiated no later than
1991.
. To meel the ,all load redu..:tion
objC'cti\es, it IS necessary to have a mix
of both USDA and [)Ol projects.
. To meet the program needs beyond the
next dC"Cade, to minimize Lo"'er Ra~in
inlerest costs, and to maintain program
..:ontinull}', construction of se\eral ne....
projC"Cts n~s 10 be initiated in the
next ~ years,
. An analysis of the repayment abiliTy of
the Lo....er Colorado River Ba.,in Fund
sho....s that sufficient funds are
available to cover the l.o"er Basin
Slales share of all COMS (capital. O&~l.
inleresl, and 3.8 pcrl:ent innalion) for
the S~98 million recommended plan.
. Continued do'>t' Federal and State
coordination among Intenor, USDA,
the Inl~ra8enc) Commillec', the Colo-
rado Riv'er Bobin Salinity Control
\d\'i~ory Coun..:il and Forum is criti..:al
to conlinued effeCli\'e managemenf of
the program.
. The evaluation ""ill n<<-d 10 be revie"'ed
annually to al1o"" for indu\ion of
ne....ly formulated. more cost-effe.:ti\'e
pro)e":h and ..:han~e~ in tC"Chnology to
a~\ure meeting program Ob)ecliv~ al
lea.'l co~t