WSP05830

• File Number: 8111.805
• Description: Arkansas River Compact Administration - Keesee Ditch
• Basin: Arkansas
• Date: 1/1/1986
• Author: HRS Engineering
• Title: Keesee Ditch Change of Water Rights Vol 3 - Potential for Upstream Exchange of Kessee Ditch Water Stored in John Martin Reservoir
• Water Supply Pro - Doc Type: Publication

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EXCHANGE OPPORTUNITIES UNDER FAVORABLE RIVER CONDITIONS

The upstream exchange of Keesee water under favorable river conditions
is accomplished through a dimunition of outflow from Pueblo Reservoir and a
simultaneous increase in outflow from John Martin Reservoir. The net river
flow below John Martin Reservoir is unaffected by the exchange.

Upstream exchange is made difficult by the fact that the Arkansas River
is heavily over-appropriated. The Arkansas River Compact and the winter storage
plans at Pueblo Reservoir and John Martin Reservoir further complicate any
opportunity for upstream exchange. There are instances, however, when the
storage agreements and the calls placed on the river work in harmony to produce
an advantageous exchange situation.

Figure 1 depicts the Arkansas River from Pueblo Reservoir to John Martin
Reservoir, and shows the location of the major ditch headgates.

When the calling ditch is located in Water District 14 or Water District
17, this implies that river flows are inadequate and possibly nonexistent at a
point or points along the Arkansas River. A reduction in outflow at Pueblo
Reservoir and a corresponding release at John Martin Reservoir will protect
users in Water District 67 but will only aggravate the call situation in Districts
14 and 17, and injury to water users may result.

For the purposes of this report, we have assumed that exchange opportunities
are not present when the calling ditch is located in Water District 14 or Water
District 17.

Various provISIOns of the Arkansas River Compact and the John Martin
Reservoir Operating Agreement restrict the ability of Water District 67 to place
a call above John Martin Reservoir. Essentially, Water District 67 is prohibited
from placing an upstream call during the Winter Storage Season (November through
March) and anytime water is available in the Conservation Pool. The Operating
Agreement has further restricted the upstream call ability depending on the
amount of water stored in certain user accounts. However, when Water District

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