London Beavers Fix Flooding Problem at Greenford Station

Commuters at Greenford Tube station used to tiptoe through floodwater after every heavy rainstorm. The ticket hall would fill with water, sandbags became routine, and nearby neighborhoods regularly flooded too.

Ealing Council faced a massive bill for engineering works to fix the problem. Then in 2023, conservationists released five beavers at Paradise Fields, a 10-hectare former golf course near the station, and everything changed.

The beavers got straight to work. They built a series of dams along the stream running through the land, creating a new lake almost overnight and completely reengineering the landscape around Greenford.

"Even in situations like on Monday, where there was really heavy rainfall, the area didn't flood," said Şeniz Mustafa, England's first urban beaver officer. She watched the transformation happen in real time as the animals tackled what would have been an expensive infrastructure project.

The beavers didn't just stop flooding. They even tore down an old dam that volunteers had built and replaced it with a superior version of their own.

Within a year of arriving, the animals had time to breed and produce a litter. Four centuries after being hunted to extinction in England, beavers proved they still know exactly what they're doing.

The Ripple Effect

The beaver dams created habitat for species that hadn't been seen in the area before. Four new species appeared in just 11 months, including sticklebacks living alongside dragonflies and damselflies.

Red pole birds, which only stop during migration, made an appearance. This month alone, 14 different butterfly species visited the site, along with tadpoles, freshwater shrimp, and toads.

"None of that would have happened without beavers," Mustafa said. "It's interesting to see how other wildlife will just recolonize and return to a space."

The local community benefits too, especially in a city where access to nature is limited. Families now visit a thriving wetland instead of a closed golf course.

"I just can't believe how much they've done in a short period of time," Mustafa told Positive News. "They basically said 'step aside, humans.'"

The project is a collaboration between Ealing Wildlife Group, rewilding organization Citizen Zoo, the Friends of Horsenden charity, and Ealing Council, with support from Beaver Trust and the Mayor of London. London Mayor Sadiq Khan called it part of the city's "rewilding revolution" to reconnect people and nature while tackling climate challenges.

Nature's engineers just proved they can solve modern infrastructure problems better than machines, and they work for free.