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WSP07251
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Last modified
1/26/2010 2:26:28 PM
Creation date
10/12/2006 2:12:56 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8143.600.10.A
Description
John Martin Reservoir - Operation Studies
State
CO
Basin
Arkansas
Water Division
2
Date
12/1/1981
Author
Zorich/Spronk Assoc
Title
Analysis of John Martin Reservoir Operation
Water Supply Pro - Doc Type
Report/Study
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />ZORICH. SPRONI< a ASSOCIATES. INC. <br /> <br />Page 10 <br /> <br />(':J <br /> <br />to a post-Compact average of 216,941 acre-feet per year. The <br />average annual combined District 67 ditch diversions decreased <br />by 8.1 percent during the post-Compact time period, from 161,681 <br />acre-feet per year (1908 to 1949 average) to 148,562 (1950 to <br />1978 average). During the 1950 to 1974 period, the average <br />Fort Lyon Canal diversion actually increased by 3,236 acre-feet <br />per year from the pre-Compact average, whereas the average Dis- <br />trict 67 diversion decreased by 4,881 acre-feet per year from <br />the pre-Compact average, <br />A change in the relationship between the Arkansas River <br />flows near Pueblo and the flows at La Junta also occurred after <br />adoption of the Compact. Had the relationship between the river <br />flows at the two gaging stations as determined for the pre-Compact <br />period remained unchanged, the post-Compact average discharge at <br />the La Junta would have been 185,772 acre-feet per year rather <br />than 120,962 acre-feet per year. Thus, the average Arkansas <br />River discharge at the lower end of Districts 14 and 17 has <br />been reduced by 64,810 acre-feet per year (relative to the flows <br />at the upper end of Districts 14 and 17) since the Compact was <br />adopted. <br />CONCLUSIONS <br />1. The ditches in Water Districts 1.4 and 17 have received <br />the benefit of increased water supplies from the adoption <br />of the Arkansas River Compact. <br />2. The only benefit received by the District 67 ditches <br />from the adoption of the Arkansas River Compact has <br /> <br />N <br />~ <br />~ <br />~ <br />
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