WSP06720

• File Number: 8111.831
• Description: Arkansas River Compact Administration - Article VIII Investigations
• Basin: Arkansas
• Date: 1/1/1985
• Author: David Pope
• Title: Report to the ARCA regarding Article VIII ‎(H)‎ Investigation of Alleged Violations of the Arkansas River Compact
• Water Supply Pro - Doc Type: Publication

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The mass diagrams of usable stateline flows indicate a

21

significant decline in flow starting in the early 1970's,

This decline is represented by the break in slope of

usable stateline flows plotted against John Martin Reser-

voir inflows. Adjusted Canon City flows. and index flows

(Arkansas River at Canon City (adjusted) plus Purgatoire

River at Las Animas).

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The mass diagrams indicate, a de-

cline of 40,000 to 50,000 acre-feet per year for the

perkod of 1974 through 1984,These findi~gs are vir-

tually unchanged from those obtained previously in the

report prepared for the State of Kansas by Simons, Li and

Associates entitled "Preliminary Assessment - Development

and Administration of Water Resources of the Arkansas

2.

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A decline in runoff occurred during the 1970's. as.evi-r~~ S~~
(p'
This period of

River " (February,

1984) ,

denced by the Adjusted Canon City flows.

low runoff. extending from approximately 1976 through

1982, was comparable to other low-runoff periods which

occurred during the 1930's and 1950's,

3 ,

The decline in usable stateline flows for the period of

1974 through 1982 far exceeded any previous decline in

usable stateline flows which occurred during the two pre-

vious dry periods referred to above.

The decline was

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