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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I The District has not explored potable reuse, the use of reclaimed wastewater directly as
_ _ _ _ _.a drinking water <lIppl)'.---However, iT1fonvation developed by the Denver Wate!" I>epartn1oot-
I indicates that potable reuse is technologically feasible but not cost-effective at this time.
Through its augmentation plan, the District provides for the reuse of replacement waters as
previously noted.

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Centennial is continuing its implementation of ASR at Highlands Ranch with the
development of a groundwater model during 1993 which will assist in the refmement of
implementation benefits and cost savings.

Wastewater Reuse

A study entitled "Beneficial Reuse of Wastewater" was developed for the District in 1979
that proposed the development of a reclaimed wastewater irrigation project in the Marcy Gulch
basin. The study evaluated the diversion of treated wastewater for landscape irrigation instead
of direct discharge to the Platte River. The study investigated the variables of land use, soil
conditions, facility requirements, costs, scheduling, water rights implications, and environmental
considerations. The study also considered several demonstration project locations. The fmdings
for the proposed Marcy Gulch site include:

Total facility cost range
Total annual cost range
Cost per acre foot
Irrigated acres

$560,000 to $763,000
$101,000 to $111,000
$558 to $811
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As analyzed in 1979, a reclaimed wastewater landscape irrigation demonstration project
of the scale proposed would not generate enough revenue, at the prevailing water rates, to fund
operation, maintenance, and amortized facility costs. However, the study concluded that
infonnation derived from such a demonstration project would be valuable in assessing the cost-
effectiveness and environmental acceptability of a large-scale reclaimed wastewater irrigation
program. In addition, reuse of treated wastewater may become cost-effective in the future as
a result of more restrictive effluent requirements for discharges to surface waters.

Water Conservation

Water conservation can serve as a supply for future growth by extending supplies through
demand reduction. In this way, conservation can provide for a portion of the needs of a growing
community. This study discusses conservation, as it relates to future supply needs, in Chapter 8.

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