Weeminuche Construction Authority

After detailed design of cable trenches and final instrument specifications included as part of the instrument procurement process, AAI mobilized a field crew to the Ridges Basin Dam sight in June of 2005 to drill the boreholes and install the first piezometers and the inclinometer into the foundation rock at the bottom of the dam excavation.  Over the next 2 years, AAI installed 27 fiber-optic piezometer transducers and 21 vibrating-wire piezometer transducers plus 3 vibrating-wire weir gage level transducers.  An inclinometer casing and 4 survey instrument piers were also installed at the dam.  Over 48,000 feet of fiber-optic and vibrating-wire cable was installed in trenches and pulled through the conduit into the Control House where AAI installed the data acquisition hardware.  Instrumentation and data acquisition hardware installation was completed in September of 2007.

SD-1500 at Ridges Basin Dam

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