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• Board Meeting Date: 9/18/2007
• Description: OWCDP Section - Water Efficiency Grant Request from Castle Pines North Metropolitan District
• Board Meetings - Doc Type: Memo

CONI

Castle Pines North Metropolitan District
Application for Water Efficiency Grant

. Valves - Valves would be installed at each major irrigation zone and can be
controlled remotely (either manually or automatically) to adjust/ shut off flows.

. Flow Meter - Flow meters would be installed to measure flows at each major
irrigation zone. This information would be collected by a central control station,

. Central Control and Reponing Station - Station would collect electronic data from
the weather station, sensors, and control valves. These data would be recorded and
operators would have the option of accessing these data in real time. The central
control station would also be able to automatically adjust flow rates throughout the
system based on ET rates and other parameters specified by the operator. The
operator would also be able to manually adjust flow rates remotely via this central
control station.

. Communication System - System would provide communication between the
aforementioned components. CALSENSE offers radio, cell phone, and hard wire
communication. An assessment conducted by Ewing Irrigation on the District
service area concluded that radio communications is the optimal communication
system for the District service area.

3.2 Maj or Features
The Irrigation Management System provides the following beneficial features that
would improve the District's irrigation efficiency:

. Automatically adjusts irrigation application rates based on real time measured ET
values and precipitation, This prevents over-watering by ensuring that landscaping
is only provided the amount of water it needs.

. Automatically shuts an irrigation system zone off if the sensor measures a sudden
significant change in flow typical of a pipe burst/leak. This immediate response
would prevent water wasting from leaks that can go undetected for days. Water
leaks are reported at the central control station, indicating to operators which
valve(s) were shut off and the general location of the leak.

. Records irrigation application rates and the amount of water used at each irrigation
zone. This provides a detailed record of the District's water use patterns and can be
used to estimate water savings.

. Water budgets can be inputted into the central control station for each irrigation
zone, The control station would notify the operator(s) when a water budget may be
exceeded. Irrigation application rates can also be adjusted to remain within a
specified water budget for a period of time. This could be of significant benefit
during times of drought, enabling the District to tightly control the amount of
water applied to each irrigation zone (regardless of ET requirements).

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