Adventure Sports Center International
This company runs a recently built artificial whitewater course on top of the Wisp Ski Resort in Maryland. This is great for teaching/learning or when the rivers are dry. Cost for a private boater is $15 per day (pretty good deal).
ASCI is located in Deep Creek, Maryland at the top of the mountain, adjacent to the Wisp ski resort (Google directions below).
Whitewater, Downhill Skiing
Adventure Sports Center International, 685 Mosser Road, Suite 7, McHenry, Maryland 21541