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Transcription
80. Methods 2 aid 3 above are substantially similar. Method 1 has a somewhat shorter length of adequacy (because of lesser total capacity to the urban area) and will not so quickly alleviate the existing seasonal water shortage in the urban area. The relative construction costs of the projects are important. Since all three methods will have an estimated adequacy of at least 30 years, the thirty year costs are compared. This comparison is as follows: Method Flpdt Cost / 30 Yr Cost 1. Single line - Lake Mead to Las Vegas / V $5,425,000 $13,297,000 2. Two lines - BMI to Las Vegas, Lake Mead to Las Vegas 6,964,000 12,851,200 3. Combination - BMI and Lake Mead to Las Vegas 6,555,000 12,633,200 Although a single line from Lake Mead to Las Vegas is the least expensive in first cost, it has the following disadvantage s: (a) The 30-year costs are greater than those of either of the other methods of supplementing the water supply. (b) The estimated duration of adequacy is somewhat less for this method since no assistance can be derived from the BMI system.
