11-Lake Pat Mayse Study Comm. recommendations

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PAT MAYSE WATER STUDY COMMITTEE Draft of Potential Recommendations June 25, 2009 We recommend that the City Council: Provide the Committee's work so far to the City of Irving, and allow them to develop their own proposal based upon the information therein. Ask for more specificity in the proposal regarding pricing, interest in interruptible flows, and relationship of the Hugo contract to Paris; or 2. Terminate negotiations and do nothing further because there is not enough water available. The City of Irving has suggested a minimum need of 20-25 MGD. Our studies show that the City's available surplus is 12.8 MGD at present, decreasing to 72 MGD by 2060 based on current contracts; or 3. Recommend to the City Council that there is some surplus water for sale under certain conditions. Those conditions are that for the years through 2020, a minimum of 12.8 MGD; the years through 2040, 8.6 MGD; and years through 2060, 7.2 MGD. These amounts would be available for sale to an outside entity on a firm basis. In addition an interruptible supply can be offered to an outside entity that most likely will satisfy up to a 25 MGD requirement in most years, subject to first satisfying existing and future Lamar county customer's needs and subject to discontinuing the delivery of water under such contract when the lake level reaches elevation 448. The above recommendations are to pursue a combined limited firm supply of water supplemented with an interruptible supply. Elevation 448 was selected to protect current recreational access to the lake. 4. Offer an interruptible supply. Make water available to the outside entity only when the lake is above elevation 448. 5. Initiate discussions with existing contract customers to determine if there are mutually beneficial terms under which contracted amounts of water could be modified to reflect a maximum annual volume as well as a peak day use, thus freeing up additional water. For example if all contracts were modified to include a maximum annual volume of 125% of the maximum current historical usage, this would free up 15.2 MGD. If added to the uncommitted 8.6 million gallons in 2040, this would meet the City of Irving's requirement. 6. Recapture the effluent from its wastewater treatment plant, and from Campbell Soup, by constructing the Consultant's suggested diversion structure at Hicks Creek, and diverting this water back to Lake Crook. Operate Lake Crook and Pat Mayse as a system with water from Lake Crook being the first water sold to an outside entity. Use the existing 1 '~M 000036