Download and put in your object data folder, it should be under the water tab of the scenerio editor. You may also import the object with Parkdat or Dimport, just make sure you replace the previous water object used in your park.
Inside the ZIP file you will find the following... -8cars v1.15 -8cars v1.21 -8cars v1.31 -8cars v1.32 -8cars v1.302 -datchecker v1.0 -datcheckernt/2000 v1.2 -datcheckerxp v1.2 -datchecker v1.5 -datchecker v1.11 -datpreview v0.2c -devia
Zip includes: three custom water rides and six unique, scenery formated water tiles. copyright, 2010 JoeZia
This is a park I made. It has an amazing ride called Brett Raft, the line is long so you might have to make it longer. I hope you enjoy :)