project: Wyke Regis Service Reservoir

client: Wessex Water Services
location: Wyke Regis, Dorset
duration: 2 months
value: £175,000

scope of works:

Removal of topsoil & over- burden
Concrete repairs
Installation of new roof  membrane
Installation of deckdrains
Clean & inspect the tank
Removal of roots & vegetation
Brick pointing
Concrete repairs to walls, arches & soffit
Installation of a new stainless steel handrail
Final cleaning of the reservoir compartment

CRL specialise in the maintenance of water sector structures and were awarded the contract to undertake comprehensive external and internal refurbishment on one of Wessex Water’s more unique structures; Wyke Regis Reservoir, a 100 year old redbrick arch structure situated in Weymouth, Dorset.

The buried reservoir required full internal and external refurbishment during a 6 week outage in the winter. The roof was exposed by removing the 0.5m deep topsoil and overburden using a long reach excavator; this was originally specified for removal by hand, a slow and costly exercise. However, CRL were able to demonstrate that the topsoil and overburden could be removed mechanically, a method which would significantly reduce the project cost and programme time.

Following the repair of the exposed roof, a new dualseal membrane was laid in conjunction with the installation of new deck drains to complete the roof waterproofing. Finally the topsoil and overburden was replaced.

Internally the tank was cleaned using high pressure water jetting, followed by the repair and inspection of the defective concrete and brickwork. Furthermore, CRL installed new stainless steel access handrails, replacing the original rails which had been in place since the structures construction. Wherever root penetration was found the roots were removed and the appropriate repairs were carried out. Finally the whole tank was thoroughly cleaned prior to chlorination.

CRL were able to complete this extensive refurbishment scheme during the winter months before handing the reservoir back to the client on time, ready for the summer demand.