Unfortunately they take longer to build back up than they do to nock them down. The Penobscot used to get over 20,000 fish in the early 80's. I think it was in 2000 or 2001 they were down to 500 fish. There was about 1100 fish in 2003. I was not able to get a count for 2004.
Lets hope the recent restoration efforts will help them come back.
P.S. It was estimated that 1436 fish came back to the entire U.S. in 2003.