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• Board Meeting Date: 7/11/2007
• Description: IWMD Section - Colorado's Future Water Supply Needs - Update on Consumptive and Non-Consumptive Workgroups
• Board Meetings - Doc Type: Memo

The roles and responsibilities of the BRTs, Consumptive Needs
Assessment (CNA) Workgroup, Department of Natural Resources
(DNR)/CWCB/ Technical Contractor are shown in the figure here
The BRTs will be completing their needs assessment updates by the
end of 2008 with assistance from DNR, CWCB, and the Technical
Contractor (COM) The CNA workgroup will support the BRTs in
completing their needs assessments and will provide a technical
forum to discuss common technical platform and consistency across
basins

Common Technical Platform

. Complete Needs
: - Assessments by
end of 2008

t.
r

DNR/CWCB
and
Technical
Contractor
Team

Assists Basin
Roundtables in
completing their
needs assessments

CNA
Work
Group

Work with Roundtables
on Completing
Consumptive Needs
Assessments

The issues of common technical platform have come up during the
process of developing Basin Needs Assessments for both
consumptive and nonconsumptive uses, The issues for the Consumptive Needs Assessment are as follows:

I. Quantifying Municipal & Industrial Demands to 2050

SWSI projected water demands to 2030 It was understood at the time of SWSI that demands will continue to grow beyond
2030, Since that time it has been the desire of several BRT s to take demands of their basins out to 2050, This has been the
case particularly on the West Slope were the basins are not nearly as built out as on the Front Range, An updated statewide
analysIs is needed to ensure wise water resource planning This group would work to ensure that a consistent statewide
methodology is used for this update to demands,

II. Status of IPPs

In SWSI the Identified Projects and Processes (IPPs) were identified. The IPPs accounted for 511,800 acre-feet (AF) of new
supply to address the demands of 630,000 AF out to 2030 The status of each of these projects will be portrayed and a risk
factor assigned. Any new IPPs will also be identified. Each IPP will have some risk that it will not yield the intended water
supply; there is also competition for the same supply along the Front Range that has been identified, which could affect the
success of some projects The IPP database that the CWCB is developing will be used to track these projects into the
future,

III. Identify Conservation Opportunities

The Municipal & Industrial (M&I) Water Conservation TRT set out to "develop a deeper understanding and greater
consensus on conservation and efficiency for municipal, industrial, and agricultural water uses," In the category of urban
water demand, the TRT made significant advances that forward understanding of the important role of water conservation
and efficiency in municipal water planning Successes include

'IIIl Consensus was reached on how conservation may affect system reliability under various scenarios
'IIIl Quantified potential long-term savings available from conservation measures
'IIIl Developed a range of potential water conservation savings from select measures that were in a comparable range to
potential water conservation savings identified in the SWSI report
'IIIl Common understanding was reached on some issues

The conclusions and recommendations made by the CWCB and the TRT will serve as a starting point for the Consumptive
Work Group to further quantify the role water conservation can play in meeting the water supply gap

PRELIMINARY DRAFT

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