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wells in tributary valleys exceeds the number along the South Platte floodplain by 23. <br />An evaluation of the data of beginning water levels as compared to Spring 1995 levels reveals <br />that approximately 43.5% of the wells have experienced a water level decline as compared to <br />71% reported as declining in the 1994 report. By comparison, 15.9% of the wells experienced <br />a rise in the Spring 1995 as compared to the Spring 1988 water level. Declines of Spring 1988 <br />to Spring 1995 range from - 0.01' to - 8.51'. Declines on the order of 0.01' are insignificant in that <br />such changes can be caused by wind, earth movement, and the effect of evapotranspiration and <br />phreatic consumption or maybe errors in data recording. The table following this narrative <br />entitled 'Table of Water Level Trends of the South Platte Alluvium through Spring 1995" recaps <br />the statistics to date for this ongoing report in terms of all wells, tributary valleys, and the South <br />Platte mainstem/floodplain. <br />These data also reveal that the averages of the water level declines and rises of wells within the <br />tributary valleys, with one exception, exceed the averages of the South Platte floodplain alluvium. <br />The average annual water level change compared to the base year of 1988 over the past five <br />years has averaged - 0.40 ft/yr in the floodplains and - 0.94 ft/yr in the tributary valleys. Water <br />level rises over the past five years averaged 1.97 ft/yr (only 1 in about 7 records showing a rise) <br />in the floodplain, and 3.60 ft/yr in the tributary valleys (about 1 in 8 exhibiting a rise). <br />The reader is advised that these data are based upon the measurements of only 69 wells. This <br />represents only 2 to 4 percent of the total nonexempt wells along the South Platte system <br />between Kassler and the Colorado -Nebraska state line. <br />4940R.cr Page 2 of 2 <br />