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Circle Control & Design Systems Ltd

Established in 1995 and worked exclusively within the utilities industry. Specialist electrical and ICA contractors based in the centre of the UK offering full design, installation and commission services from a two pump pumping station to a new treatment works.

We currently hold the following accreditation:

ISO 9001.
ISO 14001.
BS OHSAS 18001 accreditation with QAS International.
NIC approved contractor.
Compex trained staff.
FSB member.
Achilles registered company.

Key personnel are all CSCS/ECS and EUSR trained, confined space, compex, Asbestos Awareness, Face-Fit trainers, First Aid, PASMA and IPAF.
As electrical contractors we offer, LV Installation works, SWA Cabling, Containment, Instrumentation, Building Services, Fibre Optic, Profibus, Lightning Protection services, Compex works and much more….

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Knostrop STW (2023)

Knostrop Sewage Treatment Works (STW) is Yorkshire Water’s largest wastewater treatment site, serving a population equivalent of 990,000 and a full flow to treatment (FFT) of 5600 l/s. The WINEP Programme requires Yorkshire Water (YW) to achieve compliance with the new Total Phosphorus and Total Iron permit levels at 80 wastewater treatment works, including Knostrop. […]

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South Ferriby Flood Alleviation Scheme (2021)

South Ferriby lies on the south bank of the Humber Estuary, approximately 12 miles from Hull. During a tidal surge in December 2013, the existing flood embankments were inundated causing £50m worth of damage by flooding 129 properties, the CEMEX cement plant, 500 hectares of agricultural land and the A1077. Residents were left fearing for […]

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Hull WwTW - Project Update (2021)

Located in Saltend, Yorkshire Water’s Hull WwTW provides sewage treatment for a population equivalent of over 1 million people, covering an area from the west of Hull to Hedon in the east. This case study follows on from an initial paper in 2020 and details the progress of the new inlet works and the refurbishment […]

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Hookstone Road CSO (2020)

Hookstone Road CSO in Harrogate, North Yorkshire, is a CSO chamber with upstream and downstream online storage provided by large diameter pipes. During storm events, pass forward flow is restricted by the 200mm outlet pipe and 90 degree bend downstream and partially fills the storage pipes before excess flows pass through a screen at the […]

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Langsett WTW (2020)

Yorkshire Water’s Langsett Water Treatment Works (WTW) is located 17km north-west of Sheffield in South Yorkshire, on the edge of the Peak District National Park. The WTW treats raw water which is extracted by gravity from two upland impounding reservoirs at Langsett (adjacent to the WTW) and nearby Midhope (approximately 1km south-east of the site). […]

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Hull WwTW (2020)

Hull WwTW located at Saltend, east of Hull, provides sewage treatment for a population equivalent of over 1 million people, covering an area from the west of Hull to Hedon in the east. The existing treatment works was built over 20 years ago and required some specific upgrading and refurbishment. The primary drivers for the […]

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Stocksbridge WwTW (2019)

Stocksbridge WwTW is located in the village of Deepcar on the outskirts of Stocksbridge, approximately 7km northwest of Sheffield city centre. It currently serves a population of 13,000, but this is expected to grow towards 15,000 by 2030. Major housing development is ongoing near the existing works, and as part of this Yorkshire Water reached […]

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Rivelin WTW (2018)

Yorkshire Water Services (YWS) committed to the Drinking Water Inspectorate’s (DWI) compliance date of 31 December 2017 for beneficial completion of a new clarification process at Rivelin WTW. The £25m scheme required the design and construction of a large 82.5MLD buried treatment plant (80m long, 40m wide and 14m high) on the border of the […]

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Station Road (Queensbury) Sewer Flooding (2018)

Mott MacDonald Bentley (MMB) carried out an investigation for Yorkshire Water Services into the flooding of five properties in Queensbury in West Yorkshire during periods of heavy rainfall. The investigation concluded that the combined sewer system in the residential cul-de-sac had insufficient capacity during a 1 in 10-year storm return event, resulting in overland flow […]

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Flamborough Head Sewage Pumping Station (2017)

The Flamborough Head Sewage Pumping Station (SPS) is located close to a scheduled monument, a Site of Special Scientific Interest, within a local nature reserve, adjacent to a Special Area of Conservation and Special Protection Area and is home to guillemots, puffins, dolphins and porpoises. The area is also a major tourist attraction, enticing thousands […]

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Saltend WwTW (2017)

Yorkshire Water’s Saltend WwTW had a history of environmental under-performance which resulted in a significant number of customer complaints due to odour. Between September 2015 and May 2016, £18m of refurbishment and upgrade work was carried out on a fast track basis to improve this performance. Commercial arrangements were adjusted from normal framework conditions to […]

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Rivelin WTW - Sirofloc Replacement Scheme (2016)

Rivelin WTW provides drinking water for a population of approximately 200,000 in Sheffield. The raw water feeding the works is a blend of water from the Derwent Valley via Ladybower Reservoir and the local catchment via Rivelin Reservoir. The quality of the raw water has deteriorated in the period since the current plant was built […]

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Wetherby STW (2016)

Wetherby STW is the wastewater treatment facility for the market town of Wetherby and its surrounding area. It has a population of approximately 23,000 people and is mainly unaffected by seasonal variations other than the local Wetherby Race Course. As there is no direct connection from the racecourse to the sewage treatment works, all racecourse […]

What we do:

Consultants: Control Systems Design | Electrical Design

Plant & Equipment: Control Systems & Automation | Instruments | Motors, Drives & Turbines | Odour Control | Pumps | Valves, Actuators & Controls | Wastewater Treatment Systems | Water Treatment Systems

Process Engineering: Electrical Contractors | ICA Contractors