The Highridge Water District needs an additionalsupply of
Chapter , Problem 16-23(choose chapter or problem)
The Highridge Water District needs an additionalsupply of water from Steep Creek. The engineerhasselected two plans for comparison:Gravity plan:Divert water at a point 10 milesup Steep Creek and carry it through apipeline by gravity.Pumping plan:Divert water at a point nearthe district and pump it through 2 miles ofpipeline. The pumping plant can be built intwo stages: half now and half 10 years later.Gravity PumpingInitial investment$2,800,000 $1,400,000Investment in 10thyear0 200,000Operation, maintenance, 10,000 25,000replacements, per yearAverage annual power costFirst 10 years0 50,000Next 30 years0 100,000Use a 40-year analysis period and 8% interest.Salvage values can be ignored. Use the conven-tional benefitcost ratio method to select the moreeconomical plan
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