Great! Thanks for the suggestions everyone. The Merrimack is flowing at 19,000 cfs just below The confluence of the Concord River. I have been reading much about the river lately and the stretches between 93 and Lowell Dam and above it into NH seem very promising.
Charlie
Best of luck!
Definitely let us know how you do. I have fished above the Pawtucket dam a few times from shore (on both sides of the river, Pawtucket Blvd and Pawtucket St.,within a mile of the dam) but never got anything, only below the dam. They are surely in there though I've seen pics and heard plenty of stories.