Maine’s Alewives Rebound After Dam Removal Efforts

Residents of Benton, Maine celebrated the annual Alewife Festival as 9 million alewives migrated upriver this year. Thirty-five years ago, the alewife population faced near collapse with fewer than 800 making the journey. Conservation efforts focused on removing dams that blocked the fish’s traditional spawning routes, allowing the population to recover.

The remarkable rebound contrasts sharply with the situation along the rest of the Atlantic coast, where alewife populations remain low. The Benton Falls Dam became a focal point for restoration, and the annual festival now celebrates the species’ return.

The success in Maine demonstrates the positive impact of targeted dam removal on fish populations and provides a model for other coastal regions. Conservationists will continue monitoring the alewife population and working to ensure the long-term health of the species and its habitat.