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F <br />L <br />22 ' <br />regional ground water flow consistently trends toward the river, so regional ground <br />water flow is from areas farther from the river. <br />• During the March through June period of 2000, the river level fell as did most of the <br />wells. However, there is little consistency in the pattern of fall. Some wells show a ' <br />greater decline than the river, while others show a lesser decline. Rarely do the <br />declines in the well levels follow the same pattern as the decline in the river level. <br />• Most of the wells began a sharp decline in early to mid June, which corresponds with <br />the onset of irrigation. Irrigation pumping was noted throughout the area during the <br />July 5 data collection excursion. <br />Well hydrographs for the year 2000, river levels, and precipitation are included as <br />appendix H. Matching hydrographs of the 1999 data are superimposed on the 2000 data <br />for wells that were monitored in both years. <br />POTENTIAL EFFECT ON GROUND WATER FROM <br />THE PROPOSED PLATTE RIVER ENDANGERED , <br />SPECIES RECOVERY PROGRAM <br />1 <br />If an Endangered Species Recovery Program is implemented for the Platte River, water <br />releases would be made to benefit the four endangered species. During the first increment ' <br />of the Proposed Program (10 to 13 years), the states will address the impacts of all <br />surface and ground water projects existing as of July 1, 1997, by using 130,000 to <br />150,000 acre -feet of water per year on average to improve flows for endangered species , <br />in times when flows are less than the FWS target flows. Two basic types of releases <br />would be made for the species. The potential affect of pulse flows and base flow <br />augmentation, two possible flow types, was analyzed. <br />PULSE FLOWS FOR CHANNEL MAINTENANCE , <br />Pulse flows would be an increase in flows from Kingsley Dam for 3 or 4 days aimed at <br />increasing Central Platte River flows to between 6,000 and 10,000 cubic feet per second. <br />These releases, which will be kept within the river banks and below flood stage, would <br />be aimed at scouring new vegetation from the channel to help maintain the existing clear <br />channel width. These pulses would be short duration, in part because the channel <br />modification process is substantially accomplished after only a few hours, and in part <br />because the pulses require large volumes of water which cannot be sustained for long <br />Ground Water and River Flow Analyses , <br />