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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CEE_3000_HW5_fall2007 - Name_ CEE 3000: CIVIL ENGINEERING...

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