LPPD000391

• Contract/PO #: C153715
• Contractor Name: Lower Arkansas Water Management Association
• Contract Type: Loan
• Water District: 67
• County: Prowers
• Bill Number: SB 96-124
• Loan Projects - Doc Type: Feasibility Study

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March 1996 Final

indicated that Usable Stateline Flow increases an average of 5.37 acre-feet for each 100 acre-
feet of Fryingpan-Arkansas Project water that is diverted into the Fort Lyon Canal. Since
approximately 40 of this 100 acre-feet returns to the Arkansas River, Usable State line Flow
increases by an amount equal to 13.44 percent of the return flow. Other analyses made with
the Kansas H-I Model indicated that Usable Stateline Flow increased an average of 27.7 acre-
feet for each 100 acre-feet of new water that is diverted into the Fort Bent Ditch. Since the
land that was irrigated historically with these 152 Fort Bent shares has been dried-up, the
consumptive use portion of this water is essentially new to the Arkansas River stream system.
A similar factor for the effect of this historically-consumed Fort Bent water on Usable Stateline
Flow could be derived using the presumptive depletion factors in the Amended Rules and
Regulations.

Keesee to Amitv. The well depletions in this river segment were estimated at 1,013
acre-feet. LA WMA would take credit for 203 acre-feet of transit loss account water and 94
acre-feet of Fryingpan-Arkansas Project return flow. Again, 66 percent of this Fryingpan-
Arkansas Project return flow or 62 acre-feet accrued to the river during April through October.
In addition, LAWMA would release 748 acre-feet of its Article II Account water either to the
river at a daily rate of 1.76 cfs or, since the Amity suffered most of this impact directly, into
the Amity's Article II Account. Since the LAWMA account water was used historically below
the Amity headgate, the Amity was not able to divert significant amounts of the return flow
from the account water, and this entire delivery would be effective for replacing well
depletions to it. The Fryingpan-Arkansas Project water and the LAWMA Account water would
increase Usable Stateline Flow by 13 and 146 acre-feet, respectively. The consumptive use
on LAWMA account water was estimated at 60 percent historically, and the consumptive use
part of the water can be considered as new water in the Arkansas River stream system.
Analyses made with the Kansas H-I Model indicated that Usable Stateline Flow increased by
32.6 acre-feet for each 100 acre-feet of new water delivered into the Amity Canal.

Drains Above the Amitv. These well depletions were estimated at 764 acre-feet. They
would be replaced with 209 acre-feet of Fryingpan-Arkansas Project return flow and 555 acre-
feet of LAWMA account water, the latter of which would be delivered into Amity's Article II
Account. Usable Stateline Flow would increase by 42 acre-feet from the Fryingpan-Arkansas

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