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<br />24 Chapter 4-Present and Future Development
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<br />present uses more in line with State estimates,
<br />The 1990 values of "Miscellaneous Additional
<br />Depletions" may be either real additions or
<br />differences resulting from new depletion
<br />accounting procedures,
<br />
<br />Denver Expansion
<br />
<br />Water for expanded Denver needs since 1965
<br />has been met by increased diversions through
<br />the Moffat and Roberts Tunnels, The average
<br />annual recorded diversion through both tunnels
<br />for the period 1978-82 was 151,000 acre-feet,
<br />The combined 1965 normalized diversion was
<br />93,000 acre-feet, yielding an increase of
<br />58,000 acre-feet, Of the 58,000 acre-feet,
<br />4,000 acre-feet were delivered to the city of
<br />Englewood, Therefore, net diversions by Denver
<br />increased by 54,000 acre-feet, Projections were
<br />provided by the Colorado Water Conservation
<br />Board in consultation with the Denver Water
<br />Department,
<br />
<br />Homestake Expsnslon
<br />
<br />Homestake Phase I was projected to deplete
<br />28,000 acre-feet on an average annual basis,
<br />Uses between 1988 and 1990 averaged about
<br />27,670 acre-feet annually, The maximum
<br />diversion was 31,960 acre-feet in 1980, Phase II
<br />of the expansion is expected to be on line by
<br />2010 and yield an additional 20,000 acre-feet
<br />annually, Values were supplied by the Colorado
<br />Water Conservation Board in consultation with
<br />Aurora and Colorado Springs, Whether or not
<br />Phase II proceeds as expected in late 1992 will
<br />depend on the outcome of current litigation and
<br />the desire of both cities to proceed,
<br />
<br />Independence Pass, Pueblo, Colorado Springs
<br />Expansion, and Englewood
<br />
<br />Expansion of diversions to these entities is
<br />measured by increased diversions to the east
<br />slope through the Twin Lakes Tunnel,
<br />Busk-Ivanhoe Tunnel, Columbine Ditch, Ewing
<br />Ditch, Wurtz Ditch, Hoosier Pass Tunnel, and
<br />Boreas Pass Ditch, In addition, Englewood
<br />receives water through the Denver Water
<br />
<br />
<br />Board's Moffat Tunnel which is accounted for
<br />here, The recent diversions to these facilities
<br />are as follows:
<br />
<br />Diversion
<br />
<br />1981.90 1981.90
<br />Maximum 1990 Average
<br />(a~ (a~ (al)
<br />60,450 41,368 35,329
<br />9,760 5,170 5,912
<br />3,100 746 1,655
<br />2,580 785 1,188
<br />5,730 1,702 2,861
<br />11,200 11,200 8,973
<br />0 0 0
<br />4,000 4,000 4,000
<br />96,820 64,971 59,918
<br />
<br />Twin Lakes Tunnel
<br />Busk.lvanhoe Tunnel
<br />Columbine Ditch
<br />Ewing Ditch
<br />Wurtz Ditch
<br />Hoosier Pass Tunnel
<br />Boreas Pass Ditch
<br />Englewood's Moffat
<br />Tunnel Water
<br />
<br />Totals
<br />
<br />Frylngpan-Arkansas Project
<br />
<br />Diversions through Boustead Tunnel began in
<br />1971, The average annual diversion during the
<br />1981-90 period was 51,046 acre-feet, The
<br />maximum diversion occurred in 1984 and was
<br />107,600 acre-feet, The operating principles for
<br />the project state that diversions will not exceed
<br />120,000 acre-feet in any year and will not exceed
<br />a total aggregate of 2,352,800 acre-feet in any
<br />consecutive 34-year period, The latter
<br />requirement would mean a long-term average
<br />diversion of69,200 acre-feet, Since the 1981-90
<br />average diversion has been less than this, it is
<br />likely that in the coming decade or so annual
<br />diversions may be higher than 69,200 acre-feet
<br />(provided that water is available for diversion) to
<br />approach the 34-year aggregate limitation,
<br />
<br />Colorsdo-Blg Thompson Project and Windy Gap
<br />
<br />The Colorado-Big Thompson Project was
<br />completed in June 1947, and delivers water to
<br />the east slope through the Alva B. Adams
<br />Tunnel. The 1965 normalized diversion rate
<br />through the tunnel was 285,000 acre-feet,
<br />Diversions through the Adams Tunnel averaged
<br />241,270 acre-feet between 1981 and 1990 with
<br />the maximum diversion during that 10-year
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