Centennial WSD 1996 WCPlan

• Project Type: Water Conservation Plan
• Project Name: Centennial Water & Sanitation District Water Conservation Plan
• Title: Water Management Study
• Date: 8/10/1995
• County: Arapahoe
• Water Conservation - Doc Type: Complete Plan

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CHAPTER 7

WATER CONSERVATION BENEFIT
TO COST ANALYSIS

This chapter evaluates the selected conservation measures for the quantitative reduction
of water use and wastewater production, and economic considerations. In general, results of the
evaluation show a potential additional savings over the District's existing conservation program
of about 225 acre feet per year for the new conservation measures enacted over a 5-year period.
In addition, this chapter discusses qualitative evaluation criteria that include factors, other than
cost, that may impact the acceptability of the individual conservation measures.

During the implementation of new conservation measures, a period of time is needed for
consumer education and acceptance. A typical consumer adaptation period for the phasing in
of conservation measures is from 3 to 5 years. An exception to this basic role is for the onset
emergency water shortages or severe drought conditions during which communities have shown
substantial water savings in very short periods of time.

ECONOMIC ANALYSIS OF THE CONSERVATION PROGRAM

The District and its constituents want to enact conservation measures that are cost
effective. With that in mind, the economic analysis of conservation measures is described in the
following paragraphs.

Conservation Program Benefits

As a general role, conservation affects two main areas of water use: (1) internal year-
round use; and (2) outside or seasonal use. The measures focusing on internal use have the
added benefit of reducing wastewater flows, while the outside or seasonal measures affect the
summer peak use within-the system but !lave no effect en wastewater flow redllctien. Peak use
is important because the size of water system facilities must be adequate to accommodate peak
seasonal demands.

The monetary benefits to the District from a conservation program include:

· Reduction of operating costs or the marginal cost of delivering water and
treating wastewater.

· Reduction of the costs for new water supplies by reducing ultimate long
tenn demand.

· Delay of construction of new or expanded water and wastewater facilities.

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