The task was to clean and repair four seawater intake culverts and install new hypochlorite dosing lines.  Each culvert is about 400 metres long, constructed from 2.4 metre square concrete sections. The culverts were thick with marine growth and the concrete sections had shifted, opening up gaps in the culvert walls. Extended diving operations were only possible from the shoreside ends. The work had to be completed in two outages, the first in from 1^st November to 31^st December 2003, the second from 1^st to 31^st January 2004.

The refurbishment of three steel seawater intake pipelines. required the  removal of marine growth and old corrosion coating, the removal of old dosing line, anodes and anode brackets, re-coating and the replacement of anode brackets and anodes. The intake heads are to be replaced with new vortex breakers. Each pipeline is about 400 metres long and 2 metres in diameter.

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