Pole alert

► Oct 21, 2016: Former Delta worker Richard Healey blows whistle on Aurora's "neglected and decaying" network. / Oct 26, 2016: Three inquiries launched by Dunedin City Holdings, the Commerce Commission and Worksafe.

► Oct 27, 2016: Aurora confirms nearly 3000 dangerous power poles across Dunedin and Central Otago.

► Oct 28, 2016: Leaked document shows 85% of "condition zero" poles at risk of falling over.

► Oct 31, 2016: Aurora announces $30.25 million programme to replace close to 3000 power poles, but refuses to admit fault; then-chief executive Grady Cameron says network remains safe.

► Nov 5, 2016: Deloitte asked to review Aurora/Delta network.

► Nov 12, 2016: Report to Commerce Commission shows Aurora logged 68 "high or extreme risk" public safety incidents — most involving falling power poles — in a year.

► Dec 13, 2016: Deloitte report recommends shake-up of Delta and Aurora, including separate boards and chief executives. Aurara/Detta chairman Ian Parton and board member Stuart McLauchlan step down, but Grady Cameron remains.

► Dec 21, 2016: Delta confirms half its executive leadership team has resigned.

► Feb 16, 2017: Grady Cameron resigns; later receives an almost $1 million departure payout.

► Oct 28, 2017: Aurora says it is close to completing its fast-track pole replacement programme.

► Dec 7, 2017: Fresh concerns in Alexandra after collapse of three power poles.

► Sept 5, 2018: Aurora refuses to say how many more potentially dangerous poles remain on its network.

► Sept 17, 2018: Commerce Commis-sion announces it is filing High Court proceedings against Aurora.