Laserfiche WebLink
Lake McConaughy represents the volume of water that would be required from the EA <br />and Pathfinder Modification Project (PMP) (and other potential sources) in Lake <br />McConaughy combined. <br />The spreadsheet tracks Program water downstream to the Overton gage by incorporating <br />an order of operations in conjunction with the capacities, travel times, and losses. These <br />operations are similar for both the 5,000 cfs and the 800 cfs target flows. Operations for <br />Case I and Case II are, by the nature of the scenarios, different. Routing of water through <br />the river and Districts for Case I(Districts divert up to capacity) is done in the following <br />order: <br />1. Program water available at Korty (Tamarack I) is diverted subject to remaining <br />capacity in the Korty Diversion and Sutherland Canal. This Program water is <br />always diverted subject to available capacity first and the remaining Program <br />water is routed downstream to North Platte. <br />2. Program water released from Lake McConaughy is diverted at the Keystone <br />Diversion subject to the remaining capacity at the diversion, ramping rates, and <br />remaining capacity in the Sutherland Canal below the junction of the Keystone <br />and Korty portions of the canal. The construct of this operation in the spreadsheet <br />is such that the release is a function of these constraints, travel times, and losses. <br />3. Program water released from Lake McConaughy not diverted at the Keystone <br />Diversion is routed downstream to North Platte subject to the capacity at the <br />"choke point" and channel ramping rates. The construct of this operation in the <br />spreadsheet is such that the release is a function of these constraints, travel times, <br />and losses. <br />4. Program water in the Sutherland Canal is returned to the South Platte River at <br />North Platte via the North Platte Hydro Return. <br />5. Program water in the North Platte and South Platte Rivers is added at the <br />confluence for a total combined flow of Program water. <br />/30VLE Page 27 of 58 January 29, 2008 <br />PRRIP - Draft Water Management Study, Phase I