WSP07251

• 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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ZORICH, SPRoNK a ASSOCIATES, INC.

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the time period before the Compact was adopted with those for
the time period after the Compact was adopted. The relationship
between the diversions made by the Fort Lyon Canal (representa-
tive of the upstream ditches) with those made by all the ditches
in District 67 during these two time periods have been analyzed,
This comparison is valid because the Fort Lyon Canal's second
decree for 597.16 cfs with a priority date of March 1, 1887, is
what is typically termed the "swing ditch", The decree is in
priority for long periods of time, but not to the decreed ca-
pacity. Any reduction in a downstream call would be readily
detected in the diversions of such a ditch. Thus, the amount
of water diverted by the Fort Lyon Canal over long periods of
time is responsive to the amount of time there has been a call
on the river by the District 67 Ditches. For this reason, any
effects the adoption of the Compact has had on ditch diversions
above and below John Martin Reservoir would be reflected in
the relationship between the Fort Lyon Canal diversions and
the District 67 diversions.
The annual diversions of the Fort Lyon Canal and the com-
bined District 67 ditches during the time period of 1908 to
1978, along with the accumulated total diversions during the
same time period, are shown in Table 1. The Fort Lyon Canal
diversions include water which was diverted through the Fort
Lyon Canal headgate for delivery to the Kicking Bird Canal.
The combined District 67 diversions include diversions made
by the fOllowing Ditch Companies: Fort Bent; Keesee; Amity;

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