2018 – Trustpower Dam Safety Management – A Journey through Time

Thomas Fritz & Peter Lilley

Trustpower is a New Zealand based hydro generator and retailer. It started off as a business that only owned a few schemes and then during a period of rapid expansion between 1998 and 2002 acquired the bulk of its current schemes. Now it owns and operates 25 hydro schemes across New Zealand ranging from 150kW to 80MW output.

This paper examines how Trustpower’s Dam Safety Management System (DSMS) has evolved over time, taking account of developments in the business environment, proposed regulatory changes, improvements in the NZSOLD guidelines and evolution in international dam safety practice.
The Kumara-Dillmans-Duffers Hydro Electric Power Scheme (HEPS) and in particular its Kapitea Reservoir (high Potential Impact Category) will be used as an example to highlight how the DSMS evolved over this period.

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