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<br />
<br />EXHIBIT 104
<br />AN ESTIMATE OF FACTORS CAUSING DECREASES IN RIVER GAIN
<br />SAN LUIS VALLEY - COLORADO
<br />
<br />(REVISED)
<br />
<br /> RIO GRANDE SYSTEM CONEJOS SYSTEM
<br /> DEL NORTE TO LOBATOS ORTIZ AND MOGOTE TO LA SAUSES
<br /> Increase+ Increase+
<br /> Average Average or Average Average or
<br /> ITEM 1927-50 1951-77 Decrease- 1927-50 1951-77 Decrease-
<br /> -'\Dnual River" Gain in Ac-Ft 134,382 90,799 -43,583 71,384 10,847 -60,537
<br /> Annual Diversion in Ac-Ft 551,825 491,782 -60,043 274,667 216,470 -58,197
<br /> Annual Out of Basin Diversion in Ac-Ft 269,804 227,061 -42,743 52,432 60,822 +8,390
<br />I
<br />I--'
<br />"" Large Capacity Shallow Well With-
<br />I
<br /> drawal in Ac-Ft 9,358* 76,552 +67,193 196 1,839 +1,643
<br /> All Large Artesian Well Withdrawal 7,075* 100,926 +93,851 7,075* 100,926 " +93 , 851
<br /> in Ac-Ft
<br /> Harvested Irrigated Acreage 164,236 165,214 +978 36,611 44,678 +8,067
<br /> Shallow Well Effect -12,969 -1,328
<br /> >'
<br /> Large ArtesLm Effect -5,089 -15,089 ":3
<br /> "3
<br /> >'
<br /> ()
<br /> -8,390 ;J::
<br /> Transbas in ~iversion Effect '.
<br /> -
<br /> M
<br /> .,
<br /> ~
<br /> Increased Acreage Effect 1.5x978 -1,467 1.5x8,067 -12,101 "3
<br /> = =
<br /> U1
<br /> Sub-Total -19,525 -36,908
<br /> l'naccountei Decrease in River Ga in -24,058 -23,629
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