WSP07070 - Laserfiche WebLink

Home Browse Search

50 51 account the rat.es of occurrence. This R.djust..men (.. is accomplished in part X of this planning report. .. . Table 10 summarizes and shows the derIVation of capItal. costs, annual expenses, find annual recreation benefits that are used 1Il sub- sequen t financial ~"d economic aoalyse,;, ,1 t should be noted ,that the capitl\l costs and annual expenses do not lIlclud~ n. shure of JOint cost::. or expeuses which are allocated in part X of thIS report. TABLE IO.-lI:lCRlATION COSTS AND BENHlTS yielding potential of the irrigable lands has not been attained under existing ,,,ater supply conditions. LAND CLASSIFICATION Initial Ultimate Total increment $1,180,000 1 $\, I~O, 000 $2.320,000 62,500 62.500 1. 2~2. 500 1,ltO,000 2,382,500 30,000 60,000 91),000 l~, 400 '30,800 45,200 9.000 9.000 53,400 90, SOD 144,200 340,000 9H1,OOO 1.250,000 The lnnds were clR.9sified on the basis of their potential productivity and the est-irnl\ted costs of development, tnking into accounli t.he composite effects of soil topography, and drn.inage. III estimating the de\'elopment costs) f\lIowances were made for grading and structures necessary to fncilitate spreading water efficiently and the iustallR.tions required to provide fnrm drnillnge. After determining the proJuctivity ratin.gs and development costs) the lands \\-'ere nssiglled to classes on the basis of standflrds \".'hich were developed specmca.Uy for lihe Nnrrows unit by lihe Bureau of Reclamation. The resuJts of the lo.nd classification are summarized in linble 11. Exhibit 7 shows the locntion of the lands by classes, Ilem C.pital cost. 5prcific. . On....h.lf 01 J.ckson Like rehabilil~lion Tolel ~ep~rilble tapllal cosh An~ual O.A. & M. __..__________.. ~~~~:~It.fal:~::e~ke~-_-...-~:~: . ._._.___.__._ . Totllspltltlcannu.'axp,nU5__... . _.________._ Annu~1 bene!,ls, unadjusted lor time ot occurrence Tola!.. TABLE" lI-lAND CLASSIFICATlDtl [Acre~ a~d U5e as 01 ]9561 Intermillently CI15S Irriuted Irrlllaledor Tobl dr1[a~d 62,830 1.325 64,155 56,980 10,(\5 67,395 2~, 095 ]0,125 3~, 820 ----------.. 1~3. 905 U, ~6~ 166,370 27,185 0 27.18~ 171,090 22, "6~ 193 55~ 0 105,870 105;870 171,090 ]28,335 299,125 1 Cons"ts of $756,000 field Iilcilily COIl as eslimlled bylhe Nltronll P.lkSer~ice plus $3&4,000 Idded by th. Buteau ot Rtclamllion tor conli~gencies Ind indIrect costs. . : Repllcement lor ultimlle increme~1 edded by Bureau ot Reclam.tlon 10 e~llmall by Nallon.1 Park Sar~lce. WATER QUALITY CONTROL The Branch of Water Supply and PoUution Control, Public Health Service-now tbe Federal Wat.er PolluuQn Control AdlliIrustratlOn, V,S, Department of the Interinr-made a preliminary study of tbe need for water quality ,cont,rol below tbe Narrows ~eservOlr, BllSed on this ,t.udy, the SerVlce recommended that a mllumum flow of 25 cubic feet per second be maintained in the Soutb Platte R,ver from (,he Narrows Dam to the Colorado-Nebraska State line to assure a healthful a.quatic environment. NO:nIRI reservoir seepagel. tributary infl.o'....s, and return flows will prOVide more than tbe desIred flows. Benetlts or the desired minimum flows were not e.,.aluated; conse- quently, water quality control is cons~dered to ?e an illcident~1 func- tion at tbe ull.i t and has not been l1Icluded III cost allocatIOns or benefit-cost analyses, ] irrilable___ --.. 2Irliiabll_____.. 3.rr"lble__ .. Tolalirriaable 6Wnonirripble. SubIOl.' 6 nonirrlll~br.. .__ PUBLIC REA LTH The 22,465 acres of intermittently irrigttted, but irrigable, lands are uuder e:\isting ditch systems !\nd hu\'e been irrigllt.ed wheu water WitS available. Tbe.y ha\'e been treated us Ilonirrigated land in eco- nomic u.nd other Bllalyses. The)' would receive tl. consist.eut water ~llp[Jly Irom the Narrow:s ullit but are not considered to be totally "new" previousl)' non.irrigat,ed IH.nds. The 27)185 acres of f'11\sS 6\V lands A.re present.ly irrigated but do not meet the minimum requirements specified by Bureau or Recla- mat-ion stnnddrJs ror irrign.ble lauds. They will continue La receive their historic water supply under existing rights but will not partir.i- pate ill the supplemental ~lIprlie5 provided by tbe ullit.. CIAS~ 6 lands ure not presently irrig!l.ted and do not meet ilie minimum require- ments for irrigability. The Public He"lth Service, Department of Hewth, Educa~ion, and Welfare, made n study of disease vector probl~ms m.ld pubh<: health 'hazards in t'he Narrows aren based upon available mformatlOll and data, The report by the Public Health Service is appended to this planning report. All recommendations by tbe Puhlic Health Service are acceptable to the Bureau of Reclama.t.ion and will be implemented f\S fully as possible, Part VII-PROJECT LANDS Class 1 Thirty.ninc percent, or 64,155 ncres of the net irrigable area is class 1. The potential productivity or tbe8e lands i~ uniformly high, und the ue\"e]opmell(, costs are low, ,.he nlnximllm being $30 per acre. The distinguishing charncterist.ics of the class 1 lands tl.re tueir deep medium-tpxt,lIred soils Ilnd their neflrly level topography. Within this class thflre are v>>riations in soil text.ure, the most common type DESCRIPTION OF LAND CLASSES A semidetailed land classmcntion sunrey using minimum require- ments for a fully developed n.rea was mnde on approximately 299,425 acres in (.he N nrro\I,;S unit service area between February 1954 and July 1956. The survey indicated that the physical properties of the irrigable land are favorR.ble for sustn.ined irrigation and that the full