Lodore flow for Dory
Looks like the flows will be 1800 to 2,000cfs. So the answer is maybe. Depends on the type of dory you are planning to run: and how durable your hull is. Do you have durable chines, or just naked glass? If you have a 18 ft Briggs type with several passengers , you'll need close to 3,000 cfs. On the other extreme, if you had a 16ft. Don Hill type drift boat with composite chines you could get by with 1,200cfs Still you would need to be experienced at running hard hulls in rocky channels. Last Sept. I ran my 14ft decked wood & glass wide bottom McKinzie hull at 1400cfs and I wouldn't go any lower. Upper Disaster and Hells Half are pretty bony. So is S.O.B. in Split Mtn.
Hope this helps, Happy Boating!