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<br />TABLE 2 <br /> <br />PLAN I <br />1'110TfCTIP!.! M"AINST FLOODS OF ARKANSAS RIVFIl I. 1HO Hl!T1T CREEK <br />FIHST ADDED INCRHll'NT <br /> <br /> Total Total <br /> Average Average <br /> Annual Annual Excess <br />Frequency Benefits Cost* Benefits Ble Ratio <br />25 5,300 37,600 -32,300 .11, <br />50 8,800 43,400 -34,GOO .20 <br />100 14,600 51,500 -36,900 .2E <br />SPF 38,100 70,300 -32,200 .51, <br />* Incluues annual cost for operation and mllintenance <br /> <br />A levee plan was also investigated to provide protection against <br />floods originati.ne on Wild 1I0rse Creek with coincident flows in the <br />Arkansas River as a firat added increment. This plan, shown on Plate <br />4 as Plan II, comprises a levee located on the left hank of the wild <br />Horse Creek and extending along the left bank of the Arl(ansoB River I1S <br />Plan 1. The levee along the Arkansas River is necessary to prcclud" <br />the combined flows from entering Holly from the south. Provision of <br />this levee also provides incidental protection ogllins t the Ar.kmuH1N <br />and Two Butte Creek flows. The analysis of this plan for various def.re"" <br />of protp.ction is presented in Table 3. Table 3 shows mmd.mum eXCC"" <br />benefits occurrine at 100-year flood protection with a benefit to COBt: <br />ratio equalling 1.70. <br /> <br />TABLE 3 <br /> <br />PLAN II <br />LEFT BA]''J( PROTFCTION AGAINST FLOO])S 01.1 InT,f1 110HS~: CHEEK <br />FIRST ADDED INCREMENT <br /> <br /> Wi Id Horse Supplemental <br /> Creek Arkansas R. Total Total <br /> Average Average Average Average <br /> Annual Annual Annual Annual Excess <br />Frequency Benefits BeneH ts Benefits Cos tic Renefits Rle <br /> 25 49,800 (i,600) 51,400 52,900 - 1,500 q <br /> 50 86,700 (2,400) 89, HID 61,500 27,fJOO 1.1, <br /> 100 120,000 (6,200) 126,200 71,,000 51,600 1.7 <br /> SI'F 153,000 (13,000) 1(16,000 105,000 . 61,(JOO 1. .:, <br />1, Inclu(les annual cost for operation and maintenance <br /> <br />15 <br />