After 400 years, beavers are back in England; 9 dams are estimated to store 3 million litres of water and slow flood flows

Beavers are altering England's waterways by building dams and canals. These structures increase water storage and slow down river flows significantly. Studies show reduced peak flows after beaver reintroduction in several locations. The Essex Beaver Project stored millions of litres of water in new ponds.