Castle Pines North WC Plan2007

• Project Type: Water Conservation Plan
• Applicant: Castle Pines North Metropolitan District
• Project Name: Water Conservation Plan
• Title: Castle Pines North Metropolitan District Water Conservation Plan
• Date: 8/1/2006
• County: Douglas
• Water Conservation - Doc Type: Complete Plan

CDM

Section 3
Water Use and Forecasted Demands

Demands and Water Conservation

As discussed in Section 2.6, the District began to implement a variety of conservation
measures in 2003. Figure 3-6 shows a reduction in demand per capita in 2003 and a
continued reduction in 2004 with a small increase in 2005. Similarly, Figure 3-7 shows
a reduction in residential use per home in 2003 with a continued reduction in 2004
and a small increase in 2005.

Both of these figures indicate that although the community has been growing and
collectively using more water, the amount of water used per household and per capita
has decreased. This is likely attributable to the following:

. Community response to regional drought awareness campaigns

. Community response to the District's efforts to encourage conservation (see next
section)

. Relatively high precipitation in 2004, reducing the need for outdoor irrigation

Section 2.6 provides the estimated savings for various conservation measures.
However, given the multiple factors that have attributed to the lower demands in
2004 and 2005, it is difficult to precisely quantify the water savings since the onset of
the District's conservation efforts. Table 3-2 shows the change in per capita water
usage from 2002 through 2005 and the associated demand reduction. It is important to
emphasize that although conservation efforts have attributed to the reduction in per
capita usage, they are not fully responsible for the savings represented in Table 3-2.

Table 3-2 Change in Demand from 2002 to 2005

Change in per Change in per Capita Demand
Capita Demand Demand Reduction
Period AFY gpcd AFY
Change from 02-03 0.01 11.4 99.6
Change from 03-04 0.04 37.3 361.1
Change from 02-05 0.04 37.6 353.5

3.2 Forecasting Method

Water use levels in 2003 were used as the baseline for future demand projections. 2003
baseline levels were chosen because metered data for most customer types is available
for this year and also the 2003 water demands include active conservation measures
and a high level of awareness regarding the drought and the importance of water use.
As a result, the use of 2003 water demands as a base for future water demand
projections assume that existing conservation measures will continue to be
implemented and reinforced in the future to ensure that water demands do not
increase to pre-2003 levels.

Table 3-3 shows the projected demands, calculations, assumptions, and data sources
for the different customer types within the District at buildout (2011). Projected
demands prior to buildout were estimated in a similar matter as the buildout

3-8

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