WSP00279

• File Number: 8449.921
• Description: Lower Platte Tri-County Project Water Demand & Power Studies
• State: NE
• Basin: South Platte
• Date: 5/26/1941
• Author: CWCB
• Title: Water Study Covering Joint Operation of the Columbus, Platte Valley and Tri-County Projects as Worked Out by PWA project Engineers
• Water Supply Pro - Doc Type: Report/Study

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Curve 5 1& a h7drograph of' the water used by prior irrigators
betweSB North P1a~ slCl Keamll1. less the riTer pioOp beweelll Kerstcme
81ld Worth Platte. Water ueed by prior lrrigdeJ's between Worth Platte and
Kearney can be l'1IIl through the Sutherl&n4 ple:nt it deduei:ian is made f'roa
this water of the river plolcup bet_a Iteystcme_ the Sutherland's point of
dlverslon. and North Platte. the S'IJI;herland's tallraee disoharge back into.
the river.

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Curve 6 iB ,?OlIIposed ef we parts. Perl A. 18 a b)<drograph of' the
Tri-Col.lll.ty lrrl.gatlGll demand ud Cum B ,18 a hydrograph or the filllll of' tbe
South Platte River available w the Trl-Co"Clllty Project for irrigatlCl1l dw:oing
the months of April. &y_ Jl2le and October.

Cm'V& 7 18 a lIJdrognph or the 'l'ri-Co\1ll'ty irrigstiGll d_1Id leas
the fiOll of ~ South Platt;e River a_llabl. to tile Tri-CollDty ProjeGt for
lrrlgat1Cl1l dUl'~ tile IIIOJItha et April. Ma7. Juae aDd Ootobor. III "ether 1ICI!'ds.
Curve 7 18 a dlffe:renoe betwetm Part A of Curve 6 8Dd Part B of Cur9'8 6.

C_ 8 is C_ 7 lees the irrigatha. demand of :the !l..65 Lateral
of' the TJ"l-COlIJ[\;y Project." Tho 8-65 Lateral of' the Tri..c_ty f:\.oject 18 tllkeD.
art the Supply ClIZl&l above the Jolm.8C1ll Power P1aII.ta and "therefore _tel' used
in tho E-65 Lateral is not available fer pemer genoratlcm in the Jehastlll Plants.

Curve 9 is & bydrograpb of the irrlgaUea d8llaDd QD the SutherlaJld
Projeat ba8tld an the1lr cmrtr&e"t to. reles.se 100_000 acre feet of water at their
tailrace each year.

Curve 10 18 a bydrof;:raph 01' the estimated seepage 8Jld evaporation
loeses 1n the Jeftr!trf Sect1oa. 01' the Supply Canal buod on a net los8 of
1;0,000 acre fee1; per year :in this seetion.

Curn "11 18 a hJdrograph of -the es-tlmated seepage and evaporetto!!
lesses 1n the Johnson Seetlon flf the Supply Canal and too E-65 Lateral based
on a net less of' 89.000 aore f'eet per year. -

Curve 12 ill a bJdrograph of the estbBted lesses of "the Phelps
"CollDty Il'!'igatiGll Syst_ of the "ri-Cot1l1't7 Project balled on a net los8 of
51.000 acre 1'eet per year.

Curve 13 1& divided i!1to t;wo pute. Part A is a ~ph at
water available fOJ" the gfmeratlllB of' baas lead poorer by' tho SuthorleDd
Project end is secured by addlugC1D"1n!I 5. Curve 7, Curve 9. Curve 10. Curvu 11
IUld Curve 12. Part B 18 a Ol:ll'ftl of the pOiOlitr 'that call be generated with tbe
_tel' u- as available b7 Put A llJdt~ the I1Se of 8QOh water to a oeal
oapaoity of 1200 c.f.s. Tbis BtudJ' _I carried oat em t"he bash of' the five day
period and wherever vaJ'iatiDBa in flOJf were nated. an tmalysu .as _de on a d&Ir
to day basis.

C1I1"'ltl 14 is divided into two part8. Part A ill a bydrograph of the
water available for the generation of' base load power by the Jeff'rey Power Plant
of the Tri-County Projeet arrhltd at by addiJlf; Curve 2. Cum 4. Curve 7_ Curve 9.
Curve 11 and C\lJ'Ve 12. Part B is a cU!"Ye 01' tbe power which oan be generated
Ira the water sh~ as available 1n Part A. limit1ng the use of such water to a
oanal capacity of' 2OQO o.f.s.