Clear Passage.

Removals on Mill River began in 2012, and by 2018, the state had toppled three of the river's dams and added a fish ladder, opening some 50 miles of main stem and tributary fish habitat. Like many rivers in New England, the Mill River once teemed with anadromous fish - especially blueback and alewife herring - that migrated from the Atlantic into freshwater spawning grounds. Steps to increase fish access to spawning grounds in 2013 have brought numbers up to 712,000, and Johnson hopes an additional dam removal will result in the return of 20 million river herring in the next five to 10 years. [Extracted from the article]