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Well Augmentation Subdistrict - Loan Feasibility Study <br />Page 8 <br />decree WAS has not authorized any groundwater pumping by its members since 2005, i.e., zero <br />quota. The Augmentation Plan has however, operated on a daily basis to replace all on-going out- <br />of-priority depletions resulting from well pumping prior to 2005. (Restrictive terms and conditions <br />of the WAS Decree are discussed in more detail below). <br />WAS Constituent Contracts <br />6,000 <br />LL. <br />5,000 <br />MWASContracts <br />4,000 <br />U <br />3,000 <br />C 5,4 1.7 <br />0 <br />U 2,000 <br />40 <br />3,252 <br />1,000 <br />0 <br />0 F C B D E A <br />Administrative River Reach <br />Figure 4: Distribution of WAS contracts by administrative reach. <br />On a steady-state annual basis, the depletive effect of WAS well pumping is approximately equal to <br />the contracted amount within each administrative reach (20,400 ac-ft at full allocation). <br />Differences between the locations of wells and alluvial aquifer characteristics result in different <br />temporal and spatial depletion patterns. The aggregate delayed effect of WAS well pumping is <br />shown in Figure 5 for each administrative reach. <br />Figure 5: Depletive effect of WAS well pumping by administrative reach. <br />VLeonardRice <br />ENGINEERS.INC <br />WAS, Wells - Delayed Depletive Effect <br />90% <br />■ Reach F <br />80% - <br />70% <br />oC <br />60% <br />■ Reach B <br />M <br />50% <br />40% <br />30% <br />a-Reach-E--------- <br />Z <br />20% <br />10% <br />------- <br />a Reach A <br />-W <br />.W <br />0% <br />CL <br />Year I Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 <br />Years After Well Pumping <br />Figure 5: Depletive effect of WAS well pumping by administrative reach. <br />VLeonardRice <br />ENGINEERS.INC <br />VLeonardRice <br />ENGINEERS.INC <br />