WSP00381

• File Number: 8143.600.10
• Description: John Martin Reservoir
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 12/1/1981
• Title: Analysis of John Martin Reservoir
• Water Supply Pro - Doc Type: Report/Study

A

ZORICH, SPRONK a ASSOCIATES, INC.

Page 6

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Lamar; Hyde; Manvel; X, Y and Graham; Buffalo; and Sisson.

Trans-

mountain diversions were not included in any of the totals.

Analysis of the summary contained at the bottom of Table 1

clearly shows that the upstream ditches have benefited more than

the District 67 ditches from adoption of the Compact. The Fort

Lyon Canal diversions increased from the pre-Compact average by

3,236 acre-feet per year during 1950 to 1974. However, the Dis-

trict 67 diversions decreased from their pre-Compact average by

4,881 acre-feet per year during the same time period.

The information contained in Table 1 can also be used to

.

quantify the loss in average annual diversions suffered by

the District 67 ditches during the 1950 to 1978 period. The

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ratio of the Fort Lyon Canal diversions and the District 67

diversions would have remained constant at 1.38 if a change

in the relationship had not occurred after the Compact was

adopted. The annual average District 67 diversion which would

have resulted had the relationship remained constant can be

computed as:

216,941 Ac-Ft/Yr
x = 1.38

x = 157,204 Ac-Ft/Year

I

where x is the average annual District6? diversion. Thus, the

ioss in diversions suffered 'by District 67 h~s been
,L).~ ICfS7:;-/979
- 148,562 = '8,642 acre-feet per year. ~l ?

average

157,204

The data contained in Table 1 has also been presented

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graphically in Figures 1, 2 and 3. Each of these figures con-

tains trend lines for the periods prior to and after adoption

.