20b

• Board Meeting Date: 9/18/2007
• Description: CWCB Director's Report
• Board Meetings - Doc Type: Memo

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. Denver Water will conduct a small 2.5 month seeding operations with a heavy
evaluation component at the Winter Park Ski area. Denver Water will get $8K LB and
$10K CWCB to match with $40K of Denver Water funding for operations.

Two evaluation proposals from WET International and the Desert Research Institute are being
funded by the LB and CWCB to conduct an evaluation of the Winter Park seeding and are
designed to answer the questions:

1) Is the typical mountain valley generator program working well? OR Are we seeing
high ice crystal concentrations in the intended target area? and,
2) Using transport and dispersion computer modeling offer some answers as to why or
why not are we seeding high ice crystal concentrations in the target area?

The first proposal is for $1 OOK and will be split by the LB and CWCB and will install an NCAR
ice nucleus counter and other meteorological equipment at Winter Park and collect data for 2.5
months using a team of retired USBR scientists with a collective history in the field of 130 years.
The data generated from this proposal will then be used as input into the DR! computer modeling
proposal that is $53K. The DRI proposal is being split by the LB and CWCB. Both proposals
together accomplish two tasks from staff's point of view. The first is to show how to effectively
evaluate cloud seeding operations based on our collective body of knowledge and successes in
other states.

The second is to get the CWCB a bit more into the role of statewide technical assistance and
funding of independent evaluations. Local sponsors have limited funding but want to know if
their programs are working well. Program sponsors will be curious about the outcome of the
Denver Water study no doubt. In Nevada, Texas, and North Dakota a significant state presence
in the design, execution of operations, and independent evaluation of programs leads to better
documentation and more confidence in programs. This is a direction staff is heading towards
that is using some state resources to pay for cloud seeding and other state resources to evaluate,
refine, and enhance existing programs. CWCB Member input on this issue and new CWCB
Weather Modification Program direction is welcomed and needed.

COLORADO RIVER UPDATES:
. Status of FE IS on Lower Basin Shortage Guidelines and Coordinated Operations of
Lakes Powell and Mead under Low Reservoir Conditions - Arizona still has concerns
with certain provisions in the proposed Guidelines the would implement the
"Intentionally Created Surplus" (lCS) program in the Lower Basin. An ICS
conservation program is the major component in the effort to minimize shortages in
the Lower Basin. An ICS program also helps to maintain higher storage levels in
Lakes Powell and Mead thereby increasing the drought protections provided by the
reservoirs. In addition Lower Basin interests continue to express concerns with the
inclusion of protections for the minimum power pool in Lake Powell in the
computation of the 602(a) storage requirements for Lake Powell. The Upper Basin
considers protections for the minimum power pool at Lake Powell very important not
only in the sense of providing a clean renewable source of electrical energy, a large
share of which goes to power providers in Arizona, but also from the standpoint that
these power revenues help to repay the costs associated with the development of
Flood Protection. Water Project Planning and Finance. Sn-eam and Lake Protection
Water Supply Protection. Conservation Planning