CEE_3000_HW5_fall2007

# CEE_3000_HW5_fall2007 - Name CEE 3000 CIVIL ENGINEERING...

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Name___________________________________ CEE 3000: CIVIL ENGINEERING SYSTEMS Homework 5 Fall 2007 Assigned: 11/6/07 Due: 11/13/07 1. A large municipal water utility district is considering three large conduits. The first involves construction of a steel pipeline at a cost of \$150 million. The pumping and other operating costs are expected to be \$1 million/year, increasing by 1% per year. The second involves construction of a reinforced concrete channel, at a cost of \$100 million, with operating costs of \$1.5 million starting at EOY 1 and increasing by \$150,000 per year thereafter. Alternatively, a gravity flow canal can be constructed at a cost of \$200 million. The O&M costs for the canal are expected to be \$0.75 million at EOY 1, increasing by \$200,000/year. Assuming the benefits are the same for each and that each project begins operation at the same time, which conduit should be built at a discount rate of 6% if: (10 points) a. The projects are expected to last for 30 years? b. The projects are expected to last forever?

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2. A sanitary sewer may be run in a pipe either through a cut or use a lift station and pipe to run the sewerage over land. The respective costs are shown below. Which design should an engineer select assuming least cost analysis? (5 points) ____________________________________________ Cut Lift Station _________________________________________ Cost of pipe per foot \$2,500 \$500 Length of pipe 1,000 feet
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## This note was uploaded on 06/07/2009 for the course CEE 3000 taught by Professor Meyer during the Fall '07 term at Georgia Tech.

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CEE_3000_HW5_fall2007 - Name CEE 3000 CIVIL ENGINEERING...

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