Neath Abbey Canal Leak: Repairs, Tree Cutting, and the Fight to Protect the Bank.
By Gareth Davies — Photographs by The Canalman
October 09 2026
Water was escaping straight from the canal at Neath Abbey, forcing its way through a hole in the bank and disappearing underground. The source of the leak isn’t in doubt; you can see the water breaking through the weakened earth and slipping out of sight, leaving behind a saturated patch of ground and a growing sense that something beneath the surface has quietly failed.
The canal maintenance team’s response has been practical and immediate: workers have packed clay into the hole in the bank to stop the escape of water. It’s a traditional repair method, used for centuries on earth‑lined canals because clay swells, binds together, and forms a watertight seal. In theory, it’s exactly the right material for a breach like this — a dense, natural plug pressed into the damaged section to halt the flow.
One positive change along this stretch is the cutting back of overhanging trees, which is actually helping the canal rather than harming it. For years, branches have hung low over the water, dropping debris, blocking light, and adding weight to already weakened banks. Some trees had grown too close to the edge, their roots pushing into the structure and their branches trapping silt and rubbish.
Alongside the clay repair, other maintenance work has been taking place near to this stretch of canal. A hydraulic extension arm has been used to reach the canal nearside slopes and ditches, equipped with what’s known as a flail verge mower or offset bank flail mower. Instead of a single spinning blade, this machine uses a rotating horizontal drum fitted with small, heavy metal flails — tough little hammers that shred dense overgrowth, brambles, reeds, and vegetation.
We would like to thank the canal maintenance team – just two personnel – who have worked hard to tackle the leak and carry out essential upkeep along this stretch of the canal. Despite the scale of the job, they’ve been out there clearing overgrowth, managing the banks, using heavy equipment with the help of a large machine and operator for the day.
Their effort has made a visible difference, and the improvements to the canal corridor are a credit to their commitment.