BOARD00107 ‎(2)‎

• Board Meeting Date: 1/23/2007
• Description: CF Section - New Loans - Wood Lake Mutual Water and Irrigation Co. - Angel lake Outlet Repair
• Board Meetings - Doc Type: Memo

Wood Lake Mutual Water and Irrigation Company
January 23-24, 2007

Agenda Item Bg

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reached its usable life span. The pipe is cracked and leaking but does not appear to be .
structurally unstable at this time. The service spillway conduit is an 18-inch clay pipe that is in
very poor condition and does not appear to be structurally sound. The pipe has been repaired
in the past but appears to be failing at the joints.

The intent of the proposed project is to address the above deficiencies and rehabilitate the
outlet and spillway such that it meets the current standards and requirements of the SEO.

Feasibility Studies

WLlC, through their engineer Duane Smith, P.E., Smith Geotechnical, has completed the
feasibility study in accordance with CWCB guidelines. The study includes an assessment of
alternatives to repair or replace the existing outlet works and spillway.

Wood Lake Mutual Water and Irriaation Company

WLlC is a Colorado mutual ditch company and a non-profit corporation registered in the State of
Colorado. The Company was incorporated in 1958 to acquire certain irrigation facilities from the
Eaton Investment Company, including Wood, Angel and Myers reservoirs. There are currently
16 shareholders and 1682 shares of stock. The company is governed by a 5-member Board of
Directors. Per their Bylaws, WLlC has the authorization to set annual assessments, the
authority to shut off water delivery to shareholders that fail to pay assessments, and the
authority to rescind shareholder stock for resale. The Board of Directors has the power and
authority to borrow money on the company's behalf and enter into contracts.

Water Riahts

WLlC's decreed water right for Angel Lake has an appropriation date of December 31, 1899 for
the first filling and the refill decree has an appropriation date of March 31, 1900. The total
appropriation is for 424.7 acre-feet for each filling to a depth of 20.17 feet, or a total of 848 acre-
feet. In addition, WLlC's right on Wood Lake is 3,235 AF and Meyers Lake 600 ac-ft. The
company also owns 40% of Worster Reservoir (2000 AF). Total estimated delivery from all
sources is about 6,700 AF.

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Proiect Description

To repair the existing outlet and spillway conduits, WLlC studied three alternatives:

1. No-action alternative
2. Replace the Existing Outlet Works ($234,000)
3. Line the Existing Outlet Conduits ($162,000)

Alternative 1, No-action alternative - This option was not considered feasible as it would
ultimately result in the reservoir being restricted by the SEO, and the loss of water. In addition,
no-action could result in possible liability and downstream damage if the existing outlet pipe
were to collapse and lead to dam failure.

Alternative 2, Replace the Existing Outlet Works - This alternative considered complete
replacement of the outlet works and spillway. The dam would be breached and the existing
structures removed and replaced. The outlet conduit would be replaced by a 30-inch diameter .
concrete or ductile iron pipe. A new concrete gate tower would be constructed and act as the ~-"

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