WWSNZ Championships at Mangahao in April February 11th, 2020 2003-04-01T07:43:43+12:00 The Whitewater Slalom NZ (WWSNZ) National Championships slalom will be held at the new Environmental White Water Park at Mangahao, Shannon on 18-20 April. For details contact Carrol Walkley ([email protected]) or read the programme (Word, 80k). Update 1 April: Because of the severe water shortage in the lower North Island the NZ Nationals will be held at an alternative venue, the Kaituna and Tongariro Rivers. Grab an updated copy of the programme (Word, 80k).