The powerhouse launch is immediately downstream of the Centralia hydro powerhouse on the left bank off Yelm Hwy just outside of Yelm. Launching there, or at the Tank Crossing (Ft. Lewis permit needed) are OK for floating, but not recommended for powerboating. There are, or were, logs or trees across the main channel that make it difficult. The best alternative I know of for lower river jet boating is the private campground just upstream of the handicapp access, where I've seen treaty Indians launch and retrieve boats. I'll add that the Nisqually is a tad small for jet boats.

Sg