This report describes hydraulic model studies of the upper reservoir
and intake-outlet structure of the Rocky Mountain Pumped-Storage Project.
The model included the entire upper reservoir, the intake-outlet structure,
the vertical shaft, and a portion of the tunnel. The model was to be
operated in both pump and turbine operating modes.
Questions have been raised regarding the acceptable performance of the
structure over the entire range of reservoir levels and discharges. The
primary purpose of the model studies was to verify that the intake-outlet
structure was free from undesirable vorticity and flow characteristics.
Improvements to the structure were to be made to correct any undesirable
flow conditions as they were encountered. No removals of portions of the
as-built structure were to be allowed.
Documentation of the final design of the structure consisted of
qualitative vorticity evaluations, reservoir circulation patterns, velocity
measurements at the intake, pressure measurements at selected locations, and
intake headloss measurements. A description of the 1:70 scale undistorted
model and the results of the studies are discussed in the following sections.
Voigt, Richard L. Jr.; Wetzel, Joseph M..
Physical Model Study of the Upper Intake - Outlet Structure Rocky Mountain Project.
St. Anthony Falls Hydraulics Laboratory.
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