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Questions for HDR Engineering <br />t Given HDR's recent experience would you please discuss the (potential) obstacles facing <br />Irving concerning the transfer of water from Oklahoma to Texas, specifically to Pat Mayse <br />Lake. <br />Given HDR's knowledge of current Paris waste streams (industrial waste, the waste water <br />> from the city's waste treatment facility, etc.) can you give your opinion concerning the <br />feasibility of capturing those waste streams for sale, i.e., is there enough waste water to be <br />worth pursuing at nominal sale rates? <br />If surface water from other East Texas counties, e.g., Red River County, Bowie County, etc., <br />are available what are the impediments in securing such water if those counties do not <br />have a recognized water control board? Is HDR aware of any municipality which has sold <br />bonds to construct transport facilities to transfer such waters? <br />What is the current status of the TWDB water availability model that would be applicable <br />to Pat Mayse? At one time there were some problems with the Red River Basin model, and <br />it was being reworked. <br />5 During a normal rainfall year (42 ") how many days does water flows over the spillway? <br />On a normal daily basis how much water flows into Pat Mayes vs. City drawn down? (i.e. <br />60. net gain or loss) <br />.1 At the end of the 2067 (100 yr.) useful life of Pat Mayes, after fully silted according to <br />projection, how many gallons of water will be available daily? <br />-:� What is the acceptable recreational level currently, how far below overflow is that? <br />In a projected 100 yr life span of the lake, what is the total number of years figured for <br />excessive (over 42 ") of rainfall ?. In that same 100 year projection, how many droughts <br />years are projected, 1 yr -3 yr, and 1 yr - 5 yrs ? <br />k0 If rainfall just fell short by 4 inches (10 %) a year (from 42" to 38 ") for the next 50 years <br />how would that effect the current water supply safety margins for daily use? <br />1 From Jim Mathews: <br />During yesterdays meeting of the Lake Pat Mayse study committee I suggested that the <br />committee request the City's engineering consultants to evaluate strategies that could <br />potentially increase the yield of Lake Pat Mayse or otherwise increase the amount of water <br />available for sale. Although I described this as primarily an engineering exercise, I was <br />asked to identify issues that could be evaluated. My suggestions are as follows: <br />Exhibit "A" <br />6 -5 -2008 <br />