BOARD02213

• Board Meeting Date: 1/22/2003
• Description: Flood Section - Chatfield Reservoir Reallocation Study Update
• Board Meetings - Doc Type: Memo

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All was good with the Study until early 2002. In January 2002, our General Contractor failed to .
deliver a number of required interim study products. During 2002, many meetings and discussions
were conducted with the General Contractor regarding their poor/ sub-standard performance of the
study tasks. In December 2002, a joint decision was made among the Study's interested parties that
Simons and Associates be terminated for the Chatfield Reservoir Reallocation Study. The Corps'
implemented their contract termination procedures. The Study was originally scheduled for
completion by December 31, 2003.

Discussion

The General Contract: On December 18,2002, I met with the Corps in Omaha, Nebraska to seek a
resolution to the General Contractor issue. The decision was made that the Corps will act as the
General Contractor for the completion of the Reallocation Study and will sub-contract for the
accomplishment of certain study tasks. The Corps will provide the CWCB and all interested parties a
new study schedule in January 2003.

The study "Scope of Work" has a task entitled" Storage Use Pattern (to be provided by Sponsor).
The CWCB in cooperation with a Water Users Advisory Committee prepared a "Work Plan" dated
December 2001 for the accomplishment ofthis task. The Work Plan has six (6) performance tasks,
which are:
1. Evaluate four new target conservation storage pools which are 2,900 acre-feet @ 5434 feet .
ms1, 4,500 acre-feet @ 5435 feet msl, 7,700 acre feet @ 5437 feet ms1, and 20,600 acre-
feet @ 5444 feet ms1 (See attached Chatfield Reservoir map); .

2. Identify water rights available for storage in the new reallocated space;

3. Identify potential users of the reallocated space and evaluate their potentials uses;

4. Acquire available modeling data;

5. Develop representative storage use patterns for the target amounts of reallocated space;
and

6. Prepare a final report.

The CWCB has contracted the professional services of Brown and Caldwell (Sub Contractor) to
perform the Storage Use Patterns analysis. The Board has received a final draft report dated
December 2002. The study findings were presented to the interested water users at a December 19,
2002 workshop. The conclusions and recommendations ofthe study are attached. The water users
were in complete acceptance of the sub contractor's [mdings and endorsed the study findings (See
attached letters).

To better understand how the target conservation storage will impact the existing recreational
activities at the Chatfield Reservoir, the advisory committee recommended that Board in cooperation .
with Colorado State Parks conduct a Recreational Impact Study.

Flood Protection. Water Project Planning and Financing. Stream and Lake Protection
Water Supply Protection. Conservation Planning