Otherwise, the day ran smoothly with an official opening by the Prime Minister, appearances by local Iwi and the local community and people getting a chance to enjoy the water.
Mr Ferguson said the park was "the best artificial course on the planet".
"It turned out better than I dreamed of. We have had all the young slalom paddlers there over the weekend testing it and everyday they go out and are still smiling for hours afterwards.
"It is worth the time we spent building it. This is a way they can now train hard and get to the Olympics."
The park is open to the public tomorrow and Mr Ferguson expects a good turn out despite the cooling weather.