Northumbrian Water Ltd

Dromonby Lane Sewage Pumping Station

C&A Pumps is a framework contractor for implementing Northumbrian Water’s AMP4 Capital Delivery Programme. NWL have identified a number of sewage pumping stations in need of refurbishment and as a result, C&A has undertaken a number of condition surveys to determine the extent of the work required.

Dromonby Lane SPS, an ejector station situated in Great Broughton near Stokesley, was identified as such a station. Following the condition survey, a number of design proposals — including detailed drawings — were provided to NWL before the final design was agreed upon.

Due to the excellent reliability of submersible pumps supplied by framework suppliers, it was decided that the existing dry-well would be converted into a wet-well, with a new underground valve chamber being constructed alongside. Two Flygt submersible pumps (NP3127 181 HT) were installed in the new wet-well; together with all the associated pipe-work and cabling, and an ultrasonic level controller. All of the additional pipe-work, valves and cabling required in the valve chamber was installed to NWL E0702 specifications.

The existing building on site was demolished and replaced with a steel kiosk — designed and manufactured by C&A — housing a new control panel, with the surrounding compound being reinstated to allow maintenance vehicle access.

During the programme an over-pumping operation was implemented to allow the site to operate as normal, avoiding any inconvenience to the residents served by the station.

The Dromonby Lane project involved:

• New construction and modification of existing structures
• Design, supply and installation of new submersible pumping equipment
• Manufacture, supply and installation of a new kiosk and galvanized access covers
• Supply and installation of new MCC to NWL adoptable standards
• Full testing and commissioning by C&A, with training also provided to the client
• Compilation and issue of a full set of Operating and Technical manuals