New Catholic Online article.... covers the Piezometer issue in the dam (all are broken or non-functional). Has a good pic on the "sliced" tube bundles that hydraulic piezometers require (two per piezometer - hydraulic pressure transferred remote from sensor by two lines allows determination of water pore pressure when compensated for head differential between sensor and end measuring point).
New Catholic Online article - Oroville dam Piezometers
