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<br />- <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />, <br />, <br />, <br />, <br /> <br />tributary. A third classification outside of designated basins is not non-tri butary, but this <br />classification is not considered here because of its minor impact on ground water quantification <br />in the Study Area. <br /> <br />Tributary ground water is considered to be in direct hydraulic connection with the surface water <br />system and is governed by the same regulations as the surface water systems. Because South <br />Platte drainage basin surface waters are essentially appropriated by other users, any diversion of <br />tributary ground water is only allowed when withdrawals are augmented or essentially replaced. <br />Non-tributary ground water is not directly connected to the surface water system or is legally <br />defined as non-tributary under the Senate Bill 5 Denver Basin Rules and Regulations. Non- <br />tributary ground water can be appropriated at an annual rate of I % of the amount available with <br />a 2% relinquishment requirement for all volumes that are pumped. <br /> <br />Ground water development is restricted to the amount of water available beneath land owned or <br />controlled by the applicant. Ground water is considered in the State of Colorado as a property <br />right. Table 1.1 provides approximations of the average amounts of water available underlying <br />the Study Area based on aquifer properties. <br /> <br />Table 1.1 <br />Potential Recoverable Ground Water in Study Area <br />(millions of acre-feet) <br /> <br />Aquifer Ground Water <br />Dawson 12.3 <br />Denver 18.4 <br />Arapahoe 17.7 <br />Laramie-Fox Hills 9.7 <br />Total: 58.1 <br /> <br />Table 1.2 describes the total and potentially recoverable ground water from the four major <br />aquifers in both the Denver Basin and under Douglas County. <br /> <br />Table 1.2 <br />Estimated Total and Potentially Recoverable Ground Water <br />Denver Basin Aquifers <br />(millions ofacre-feet) <br /> <br /> Denver Basin Douglas County <br /> Total Water in Potentially Total Water in Potentially <br />Aquifer Storage Recoverable Storage Recoverable <br /> Water Water <br />Dawson 48 27 23 13 <br />Denver 89 42 24 11 <br />Arapahoe 150 80 29 15 <br />Laramie-Fox Hills 180 110 15 10 <br />Total 467 259 91 49 <br /> <br />Page 1-7 <br />