Cotebrook Reservoir Refurbishment

Project Summary

This project required the refurbishment of two potable water reservoirs, located near Cotebrook, Cheshire.

Project Description

This project required the refurbishment of two potable water reservoirs, located near Cotebrook, Cheshire. The reservoirs were partially buried and brick-lined. The reservoirs were located on the same rural site and were both of the same age (constructed in 1910). The purpose of the project was to improve bacteriological compliance and security of the existing reservoir by carrying out extensive refurbishment works.

Project Delivery

The following works were carried out by Coffey Construction:

  • The design and construction of a permanent access road, including fencing and gates.
  • Discharge of residual silted water (approx. 0.5 – 1.0m deep) by a tanker off-site to a licensed waste facility.
  • Removal of the existing concrete overflow channels. The waste concrete material was processed for re-use on site.
  • Design and installation of new reinforced concrete column base slab and base slab infill panels to both reservoirs.
  • Design and installation of new reinforced concrete walls and wall bases to both reservoirs (including a dry penstock chamber in the internal corner of each reservoir).
  • Design and installation of a new reinforced concrete roof and roof support beams.
  • New ducting and draw chamber system for power, telemetry and the security alarm system between the new pressure relief valve superstructure and the existing site security kiosk.

The completed reservoirs became a confined space once the walls and roof were completed.  An entry permit system was put in place and only trained personnel with breathing apparatus could work inside.

On completion of all other work, we also carried out replacement planting of all hedgerows, together with appropriate protection works (post and rail double fence).

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