Question

In: Civil Engineering

The county fire department is considering two options (A and B) for upgrading its aging physical...

The county fire department is considering two options (A and B) for upgrading its aging physical facility. Assume an interest rate of 6% per year and 50-year time period.

Option A: Involves remodeling the existing fire station by spending $2,252,000 now. In addition, the cost for personnel and equipment will be $126,000 per year.

Option B: Calls for buying 5 acres of land for building a new fire station. The cost of the land in that area is estimated to be $366,000 per acre. The size of the new fire station would be 9,000 square feet with a construction cost of $151.18 per square foot. Contractor fees are expected to be $421,500(Assume all of the costs for plan B occur at time 0). In addition, the sale of the old site is to anticipated to net a positive $500,000 five years in the future from today.

Q1: Determine the Present Worth of Plan A and Pan B.

Q2: Which plan is better on the basis of present worth analysis?

Solutions

Expert Solution

Here, we have

Rate of interest,i = 6% per year = 0.06

Time period,n = 50 years = 50

  1. PRESENT WORTH
  • OPTION A:

Cost of remodeling ,C= $2,252,000

Cost of personnel and equipment cost,E = $126,000 per year

Present worth ,PW​​​​​A= Cost of remodeling + Present value of personnel and equipment cost for the given time period,i.e. 50 years.

​​​​​​

  • OPTION B

Cost of land = $366,000 × 5 = $1,830,000

Cost of construction = $151.18 × 9000 = 1,360,620

Total cost,C = $ 3,190,620

Amount incurred on selling the old site after five years,S = $500,000

Present worth,PW​​​​​B​​​ = Total cost of construction + Present value of amount incurred on selling of old site.

​​​​​​​

  1. Option A is better plan then that of option B because option A has less present worth then option B.

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