The draining of the southern Stuart Macaskill water storage lake at Te Marua has begun, signalling less stored water for the region, including Porirua, this summer.
The two lakes are being upgraded to boost both earthquake resistance and storage capacity.
‘‘We’ve found that the lakes’ embankments may crack in a major earthquake . . . seismic strengthening is a top priority to meet new dam safety guidelines,’’ Greater Wellington’s social and cultural wellbeing committee chairman Nigel Wilson said.
The upgrade works will require a lake to be empty this summer and the next – and possibly a third summer if there are any construction delays.
Mr Wilson says Greater Wellington will be working closely with the city councils to let the public know how we’re doing for water and provide tips on how people can help so that we don’t go short of water for essential uses.