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