Reservoir Safety

Stonbury is pleased to offer a range of services to improve the safety of impounding reservoirs and help clients meet their reservoir safety regime obligations.

Works include the installation, maintenance and refurbishment of a variety of structures associated with impounding reservoirs.

Dams and Walls

Stonbury provide specialist repair, leak-sealing, stabilisation, and modification to a range of structures including, but not restricted to:

  • Concrete, stone, and block dams
  • Earth fill and rockfill embankment dams
  • Retaining walls and perimeter walls
  • Steel components, e.g., weir plates


Spillways require regular inspections and maintenance and therefore Stonbury frequently undertake the following works to ensure their continued safety and functionality.

  • Cleaning and inspection
  • Vegetation removal
  • Repairs to concrete, stone and block structures
  • Stabilisation and improvements to spillway walls and basins
  • Stone works: Replacement, rebedding and repointing

Tunnels and Pipework

Works include specialist repairs and maintenance to structures such as shafts, scour tunnels and draw-off towers and other concrete and steel pipework.

  • Cleaning of sludge, silt and ochre build-up
  • Removal of degraded coatings
  • Concrete repairs
  • Waterproof coating application
  • Steel pipework replacement, refurbishment, and rustproofing
  • Repacking of leaking valves
  • Drainage improvements, manholes and chambers

Access Structures

Stonbury supply new build access structures along with maintenance and refurbishments that ensure the provision of safe and secure access to assets.

  • Vehicular access tracks
  • Steps and walkways
  • Steel, concrete or gravel pathways including non-slip coatings
  • Entrances, gateways and fencing
  • Repair or replacement of steel landings, ladders and handrails
  • Steelwork blasting and painting of handrails and bridges


Installations and works to control erosion and maintain and stabilise embankments include:

• Gabion baskets
• Stone, concrete, and geotextile retaining walls
• Reforming of earth embankments
• Wildlife exclusion, e.g. rabbit netting and artificial badger sets
• Grass cutting

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