The dam is monitored using:

• 7 normal plumb lines (a weighted wire suspended in the topmost gallery and held taut at the bottom of the shaft by a 150 kg weight) with 26 points for taking readings, so that upstream-downstream and left bank-right bank displacement can be measured*
• 3 inverted plumb lines used to check for displacements in the foundation of the dam
• 3 rockmeters to measure settlement or heave in the foundation of the dam
• 16 manometers for pressure tapping with measurement of infiltration rates
• 3 uplift measurement devices situated upstream of the drainage gallery
• 3 level meters placed at the bottom of the structure and in the bottom gallery to measure water infiltration*
• 8 piezometer tubes to gauge the water pressure or head
• 1 geodesic measurement network

*these measurements are transmitted to the operations centre at Sion