7748

• UCREFRP Catalog Number: 7748
• Author: Western Water Consultants, I.
• Title: Final Report on Little Snake River Depletions by Pot Hook, Three Fork and Powder Wash Rights.
• USFW Year: 1990.
• USFW - Doc Type: Laramie, WY.
• Copyright Material: NO

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the full appropriation amounts for the months May through September of each year.
There are two separate rights for Pot Hook Canal as shown on Table 1, page 6. The first
right, dated June 5, 19591 is for 260 cfs. The second is an enlargement right of 400 cfs,
dated April 19, 1966. In the Definite Plan Report, the USBR stated that the initial
capacity of Pot Hook Canal would be 290 cfs. So that demands do not exceed canal
capacity, Pot Hook Canal demands consisted of 260 cfs (priority date of June 5, 1959) and
30 cfs (priority date of April 19, 1966). It was found that it was not possible to provide
the decreed amount throughout the year, therefore the demands for the Pot Hook Canal
were set at those estimated by the USBR in the Definite Plan Report.
In Scenario 1, the modeling of all Pot Hook Project rights, water is diverted from
streamflow first and, if the water availability is insufficient, a call for storage water is
placed on Pot Hook Reservoir to satisfy the remaining amount. For Scenarios 1A and 1B,
only Pot Hook Canal is allowed to draw on storage water.
Bypass flow requirements for instream flow considerations were included in the

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WIRSOS modeling. In the Savery-Pot Hook Project, Definite Plan Report, (USBR, May
1977), no provisions were made for instream flows below the dam site in the operation
of Pot Hook Reservoir. An instream flow requirement of 24 c.f.s., equivalent to that
determined for Savery Creek below Sandstone Dam, was used for this study. This flow
requirement has not been quantified by biological studies and is for study purposes only.
In the modeling, the instream flows were met with reservoir bypasses and storage releases,
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