Bovingdon to Heronsgate Reservoir Station

Affinity Water (AW) identified the need to refurbish two of their larger water pump stations at Bovington and Heronsgate Service Reservoirs to mitigate the effect of sustainability reductions. Affinity Water produced a concept design for the refurbishment works and the project was competitively tendered by Enisca. Enisca identified an alternative solution utilising offsite build methodology reducing the works programme, risk of impact to the supply network and capital costs. The Enisca alternative solution provided Affinity Water with more than a 10% saving on the ITT concept solution and provided Affinity Water will a high-quality new asset.

Enisca was engaged as Principal Contractor for the scoping, design, provision, installation, testing and commissioning of all mechanical, electrical, control, automation, monitoring, telemetry / SCADA equipment, and the associated ancillary civil engineering works. During an ECI stage we met with AW Asset Management and Operational teams to develop/confirm the scope, optioneer solutions and identify efficiencies.

MEICA Works at the 2 No. pump stations included:

• At Heronsgate - 2No 560KW duty/standby drywell centrifugal split case pumps with a new increased delivery duty of 26.52 Ml/d
• At Bovingdon - 2No Heronsgate Boxted 220KW duty/standby pumps capable of duty of 26.4 Ml/d and pumping to Cholesbury 2No duty/standby 110KW pumps
• Safety critical surge plant consisting 2 x 25m3 surge vessels for Heronsgate pumps and 2 x 26m3 surge vessels for Boxted pumps & surge compressors
• HV Substations
• Control panels and systems including PLC & HMI & instrumentation.
• Modular off-site constructed steel building
• Access walkways, stairways & lifting equipment.
• Full commissioning and interfacing with client’s telemetry system.
• Civil Works including site investigation, excavation & construction of site compound
• Construction of concrete pump station sub-structures adjacent to reservoirs
• Temporary and permanent diversion of existing underground pipelines
• Power and signal ducts, coring, wall penetrations, draw pits
• All temporary and permanent construction works associated with the new pumping station structures adjacent to reservoirs, HV sub-stations, and surge vessels.
• Access roads alterations including all advanced NRSWA liaison
• Drainage
• Reservoir boundary fence and access gates
• Landscaping