A major project to restore a 4.3-mile stretch of the River Ash to its natural winding path has been completed.
The Herts and Middlesex Wildlife Trust called it one of the largest chalk river restorations in Hertfordshire.
It took nearly eight years to plan and carry out, creating new wetlands, ponds and habitats for species such as trout, water voles and kingfishers.
Chalk rivers are among the rarest ecosystems on Earth, with only about 260 worldwide.
“Chalk rivers have faced pollution, overuse and climate pressures,” the trust said.
More than 3,000 tonnes of gravel and 300 woody structures were added to improve habitats and reconnect the river to its floodplain.
“It’s rewarding to see such an ambitious project completed,” said Sarah Perry of the trust. “Healthy rivers protect us, support wildlife and boost wellbeing.”
