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<br />March 1 996 Final
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<br />Since the July 1995 report was finalized, LAWMA has entered into purchase contracts
<br />with the owners of 2.5 cfs of the remaining 3.0 cfs x-v water rights. These water rights
<br />were purchased from four individuals who irrigated approximately 53 acres in sec. 7, T.23 S.,
<br />R.43 W. The locations of the X-V Ranch and the land parcel associated with these
<br />outstanding interests are shown on the map included with this supplemental report. In view
<br />of these additional acquisitions, i~P....!~~~9L!:.~~~~A's ~X~Y
<br />water rights to reflect,.,!he presently cOl"!templl!!.~d o~r,J.ership <:),f 68.5 cfs ra!'ler than the 66.0
<br />____".--./>,...,,-,,-~'''',....<.,.....---,...,.,.,...,.. . ---.,.."'_"''''''_....~''.,.'''~- ""-'-',^".",,,,~-,.--'-"'" ''''''-",:-.,,",''-' '-'-, ,"_,",-~,...,,_y_...'"~"~' ""-'-""',-"'."i"-.,,'"",,",,"',.-.,....,..___..""., - "":~~
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<br />cfs considered in the July 1995 report, and also to reflect refinements in the proposed use
<br />~_____--."=-....."'"._T'""...."~-'~"~,.."'.'-"-;',,...-~...._"'-.-'"_..,._.,.'-."-....),._~__".,''"'_,''''.<'.~.-''.'-~.,.,-'''''~,,_..<~;'-..,;.;,,,,-,,,,,.,, '<"'-', ..""j:"'~<'_., ""_,,~;-_,,,..kv__< -P~~"J'-"""'-'-'~'!l\..''-' _~___-~
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<br />of the water. There will be 0.5 cfs of the water right for the X-V Irrigating Ditch thatTs not
<br />------
<br />owned by LA WMA.
<br />
<br />Table 1 shows the water diverted into the X-V Irrigation Ditch under LAWMA's
<br />contemplated ownership of X-V water rights during 1950-94. It was prepared from the
<br />official records of the Colorado Division of Water Resources. These diversions averaged
<br />7,529 acre-feet annually, and ranged from 886 acre-feet in 1965 to 20,590 acre-feet in
<br />1994.
<br />
<br />It is noted here that LAWMA's future yield under these water rights should not be
<br />limited by the historical diversions. This is because the historical diversions were affected by
<br />the stream depletions from well pumping. After the well users make replacements to the
<br />river, the yield of Colorado water rights will increase to some extent, and LAWMA should
<br />benefit from this increase in water supply, the same as the other water right owners. The
<br />proper limitations for LAWMA's yield under these water rights should therefore be based on
<br />the full water supply for the 3,079 acres (3,026 acres on the X-V Ranch plus 53 acres
<br />, ---
<br />associated with the outstanding interests) that were irrigated with the water rights.
<br />
<br />Table 2 shows the consumptive irrigation requirements for these 3,079 acres during
<br />1950-94. These consumptive irrigation requirements can be defined for the purposes of this
<br />analysis as the amounts of irrigation water that would have been consumed by the crops
<br />assuming sufficient irrigation water was provided so that crop production was not limited by
<br />lack of water. In other words, the consumptive irrigation requirements are essentially the
<br />optimum amounts of evapotranspiration -- crop production would have been limited if less
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