PROJ00515

• Contract/PO #: FS0019X
• Contractor Name: Turkey Creek Snowball Creek Project CWRPDA 1985
• Contract Type: Loan
• Water District: 0
• County: Archuleta
• Loan Projects - Doc Type: Feasibility Study

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3.7.2

for 30 cfs. Mainstem San Juan decrees were unchanged. These studies
showed that, for the assumed worst case, there could be a maximum of 22
consecutive months when project water could not be stored. For the most
probable case, or incorporating the 30 cfs right into the proj ect, that
period was cut in half. Continuing studies that have been performed
following the reconnaissance report, have examined combinations of the
following conditions:

1. Indian winter demands assumed senior to the project.
2. Only historic diversions on Turkey Creek assumed senior to the
project.
3. Only the oldest Snowball Ditch decrees of 14 cfs assumed senior
to the project.
4. Storage shortages made up by direct diversion from the San Juan
River.
5. Snowball Reservoir used only to make shortages in diversion from
the San Juan River (consider the river as the primary source).
6. Consider all Snowball Ditch decrees fully developed (Snowball
Reservoir a:;; the sole source of supply for the Town of Pagosa
Springs).

These various runs show that for years of average or greater than
average runoff, there is adequate project water, regardless of the
assumptions made. The period that determines reservoir size is the 1977 -
1978 season, when there would have been practically no water available to
the project during the summer irrigation season. This would be true
regardless of whether full or partial utilization of the Snowball Ditch
senior decrees was assumed. With the knowledge gained from these
preliminary runs, the criteria for the final run, as presented in Section
3.7.2, were adopted.

Operating Criteria

The criteria adopted for the final operating run are as follows:

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