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<br />not be made durlng and lmmediately after the storms. rro~pt evacuatlorr
<br />of flood storage in the proposed Fountain Reservoir at maximum channel
<br />capacitles would ald. the delivery of floodflows to John Martin Reser-
<br />VOlr., Moreover, the operation of. the proposed reservoir project, to.
<br />gether wIth the potential Arkansas River Channelitation project, is
<br />expected to increase materially the inflow into John Martin Reservoir,
<br />
<br />26, KSTII~TED BENEFITE.- Benefits which would be creditable to
<br />the Fountain Reservoir Project have been estimated On the basis of a
<br />100-year period of analysis. The principal tangible prlmary benefits
<br />would be derIved from the prevention of inundation, scour, and sedimen_
<br />tation damages to present and future development in tbe flood plain.
<br />Additional tangible primary benefits would accrue to develo~ent of
<br />recreational facilities and utilization of the unemployed labor force.
<br />Intangible benefits also would accrue but a monetary value cannot be
<br />placed on these benefits. Theestimatedavcrageannualbcnefits
<br />amount to $2,299,450 as itemized in Tabl~ 6. The derivation of bene.
<br />fits is fully described in Attachment V and summarized in thc
<br />following paragraphs.
<br />
<br />2S. E:ST.It-'.ATED PROJECT COST.- The estimated first cost of the
<br />Fountain Reservoir Project 1S $32,401,000; Annual charges for thc
<br />project at 4.7/8 percent interest rate would be $1,882,000. The
<br />estimated proJect costs, investment, anJannual cha.rges are pr esented
<br />in detail ill Attachlflent 1 andsununarizedlnTableS.
<br />
<br />TABLE 5. ._ Estima.ted First Cost, Investment, and Annual Charges,
<br />Fountain Reservoir Project (January 1969 price levels)
<br />
<br />27. Benefits from tho, reduction of inundation and scour damages
<br />would derive from two general sources: (l)standardprojectflood
<br />protection to the. flood plain.of Fountain Creek at and in the vicinity
<br />of Pueblo, as described in this supplemental report; and (2) reduction
<br />of main stem flood flo~s in the Arkansas River from Pueblo downstream
<br />to Las Animas, including the urban areas of La Junta and North La Junta.
<br />The annual benefits for prevention of flood damage by the Fountain
<br />Reservoir Project are equal to. the difference between the estimated
<br />average annual damages with and without the project operating. As
<br />showninTable4,theaverageannua1f1ooddamageswithouttheproject
<br />in operlltion are estimated at $2,817,140 in<:luding an allowance of
<br />$944,760 for damage to future Jevelopment in the flood plains. The
<br />average annual damages with, the project in operation would be
<br />$1,582,910, also including an allowance for damage to future develop-
<br />ment. The benefits attributable to the project for prevention of
<br />inundation and scour damages are therefore $1,234,230,
<br />
<br />am Total
<br />First Cost:
<br />Lands andOlll1lages $3,583,000
<br />Relocations 5,562,000
<br />Om 15,893,000
<br />Recreation 3,043,000
<br />8uildings. grounds, and utilities 36,000
<br />Permanent operating equipment 17,000
<br />Engineering and design 2,373,000
<br />Supervision and administration 1,894,000
<br /> TOTAL fIRST COST 32,401,000
<br />Interest during construction 1,256,000
<br /> TOTAL INVE5"lMENT 33,657,000
<br />Federal Investment Apportionment 131,451,500
<br />Non_Federal Invest~ent Apportionment 2,20S,500
<br />Annual Charges:
<br />Federal Interest 00 investment (4-7/8%) 1,516,190
<br />Federal amortization of investment (4_7/8\, 100yrs) 13,060
<br />Operation and maintenance 99,000
<br />Major. replacements 20,350
<br /> Total Federal Annual Charges 1,64$,600
<br />Non-Federal interest oninvestmeat (4-7/8\) 90,440
<br />~on_Federal amortization of investment (4_7/8\. 100yrs) '"
<br />Operation and maintenance llS,180
<br />Major replacements 21,000
<br /> Total Non-Federal Annual Charges 233,400
<br /> TOTAL ANNUAL CHARGES 1,882,000
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<br />28. The estilllated average annual suspended sediment flow of
<br />Fountain Creek at the Fountain <Jamsite is 374'acre-feet. Bedload is
<br />estimated at 15 pcrccnt, making a total of 430 acre-feet pcr year.
<br />Approximately 400 acre-feet would be deposited in the reservoir area
<br />and the remainder would be discharged downstream. The cost of storage
<br />in Fnulltain Re~ervl\IT is estim~ted ~t $115,~O pe, ~c,e.fnnt. It is
<br />reasoned that the benefit for prevcntlon.,of downstream sediment damages
<br />would at least equal the co~t of storage,'.or $46,240 on an average
<br />annual basis.
<br />
<br />29. Recreati'm benefits would accrue to Fountain Rcservoir by the
<br />establishment and maintenance of an inViolate pool of 20,000 acre-feet
<br />which would have a surface area of about 880 acres. Construction and
<br />operation of the projcct would provide opportunities for many lake-
<br />oriented activities and numerous other outdoor recreation pastimes.
<br />It is estimated that annual visitation to Fountain Reservoir would be
<br />about 300,000 with completion of initial facilities three year~ after
<br />illlpoundlllcnt, and the visitation would 1I1tilllately reach m<>re rhan
<br />800,000 annually, witb development of additional facillties as the
<br />
<br />'Includes one_half of $4,411,000, separable cost of recreation
<br />
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