Extra Mangahao release scheduled February 11th, 2020 2000-09-12T21:43:50+12:00 An additional Mangahao release for mid-April 2001 has been confirmed with the operators of the Mangahao Power Station. This release is to make up for the cancellation of the spring 1999 release. So mark the dates of Saturday 17th March and Saturday 14th April 2001 in your paddling diary!