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Fig. 12 Strain distribution measured along the penstock access tunnel 5. CONCLUSION SMARTEC has instrumented more than 20 dams with fiber optic distributed sensing within the last 15 years. The use of distributed fiber optic sensors for the monitoring of civil structures and infrastructures opens new possibilities that have no equivalent in the conventional sensors system. Distributed sensing technologies have been applied on key hydraulic components such as penstock and waterlines. Fiber optic distributed sensing is a recognized technology in dams engineering and meets todays goals of asset management. It overcomes limited capability of conventional sensors with reduction of maintenance expenses. Distributed sensing is often combined with fiber optic point sensors (temperature, piezometers) and data communications are fully compatible with plant DCS or SCADA system. 6. REFERENCES [1] INAUDI, D., Distributed Fiber Optic Sensors for Dams and Levee Deformation Monitoring, GEG New Orleans, 2015. [2] INAUDI, D. and CHURCH, J., Paradigm shifts in monitoring levees and earthen dams: distributed fiber optic monitoring systems, Proceedings, 31st USSD Annual Meeting & Conference, San Diego, California, USA, 2011. [3] JORDAN, A and PAPILLOUD E., Penstock structural health monitoring, Hydro 2015 Bordeaux, Session 19 Gates and penstock, 2015. 685