Table 1. Structure of dam surveillance system in Switzerland
||Owner (dam safety engineer, technical staff)
||Regular inspection of condition (by visual observations) and behaviour (by measurements). Tests of spillway and bottom outlet gates.
||Monitoring records and test protocols
||Experienced engineer (civil engineer)
||Analysis of the measured data and observations. Annual inspection of the dam.
||Yearly report on condition and on measured behaviour.
||Experts (civil engineer and geologist)
||Inspection and appraisal of the dam safety every five years.
||Report on condition and long-term behaviour. Analysis of special safety related questions.
||Dam Safety Authority
||On-site inspection. Review of the annual reports and the expert’s appraisal. Verification of the implementation of the necessary measures.
||Interventions if measures have to be implemented.