Hydraulic Model Study of the Blue River Dam Power Plant, Penstock, and Outlet Works
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Hydraulic Model Study of the Blue River Dam Power Plant, Penstock, and Outlet Works
Published Date
1994-07
Publisher
St. Anthony Falls Laboratory
Type
Report
Abstract
The Stone and Webster Engineering Corporation (S&W) contracted with
St. Anthony Falls Hydraulic Laboratory (SAFHL) to construct and test a
physical hydraulic model of a modified stilling basin for the Blue River Dam
Power Plant Project outlet works. This project was designed by Stone and
Webster for the Eugene Water and Electric Board. Modification to the
stilling basin was necessary to accommodate changes in the design of the
outlet structure necessitated by the installation of hydroelectric power
generating turbines. The basin is presently owned and operated as a flood
control structure by the U.S. Army Corps of Engineers (COE).
The facility is operated according to COE procedures within the general
constraints of a reservoir water surface level of maximum 1357 ft MSL and
minimum 1180 ft MSL, and between the minimum and maximum flows of 50
cis to 8400 cfs, respectively. Flow exiting the reservoir is controlled through
gates located at the upstream end of a 2000 it long 18.5 diameter conduit.
The downstream end of the conduit concludes in an open channel outfall into
the existing stilling basin. The design scheme for the hydro facility involved
modifying the outlet works to incorporate a multiple bay gated outlet
structure and a bifurcation leading to the powerhouse. Modifications included
pressurization of the penstock and outlet works necessitated by the combined
usage of the flow conduit for both hydropower and flood discharge.
The objective of the study was to perform comparative testing of the
existing outlet works stilling basin and the proposed design. In this effort,
the study evolved into five distinct phases of testing. The test results are
summarized according to phases with the reason for and objectives of the
next phase outlined in the conclusion of each existing phase. A summary of
the various phases is as follows:
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Stone & Webster Engineering Corporation; Eugene Water and Electric Board
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Voigt, Richard L.; Erickson, Benjamin; Ellis, Christopher R.. (1994). Hydraulic Model Study of the Blue River Dam Power Plant, Penstock, and Outlet Works. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/131889.
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