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Circle Control

Established in 1995, Circle Control part of the Empower Group, is a trusted electrical contracting company based in Snaith, near Selby.

For over 30 years, we’ve been delivering LV electrical installation solutions across the utility and renewable energy sectors, combining technical expertise with an unwavering commitment to safety, quality, and environmental responsibility.

Originally focused on the Water Industry, we’ve since expanded into Renewable Energy, supporting clients on the UK’s journey towards a more sustainable and resilient future. Our approach is straightforward, cost-effective, compliant, and built on decades of engineering know how.

We are NICEIC approved, ISO 9001 accredited with Citation, and proud members of the Achilles Utilities Vendor Database (UVDB) and Constructionline.

Our skilled team holds a wide range of industry certifications, including CSCS/ECS, EUSR, Confined Space, Compex, Asbestos Awareness, First Aid, PASMA, and IPAF, ensuring safe, compliant delivery across every project.

As part of the Empower Group, we’re proud to combine long standing technical excellence with a forward-looking focus on innovation and sustainability, helping clients reduce environmental impact, improve operational efficiency, and future-proof their infrastructure.

Dearne Reach Integrated Constructed Wetland (2025)

Delivering a first-of-its-kind low-carbon stormwater management solution in Yorkshire

Dewsbury WwTW (2025)

New 45m diameter primary settlement tanks to meet predicted population growth and ferric dosing for phosphorus removal to ensure compliance

Killinghall STW (2025)

Achieving phosphorus reduction and capacity expansion

Knostrop STW (2025)

Enhanced biological phosphorus and tertiary solids removal plants achieve tightened WFD consents with reduced energy consumption

Embsay WTW (2024)

Embsay Water Treatment Works is a standalone 24 ML/d water treatment works operated by Yorkshire Water (YW) and located in the Yorkshire Dales National Park, providing clean water to over 15,000 people in Skipton and surrounding areas. The existing works comprises of clarifiers, rapid gravity filters and a chlorine contact tank with associated chemical dosing. […]

Esholt STW (2024)

Fulfilling the Water Industry National Environmental Programme to reduce overall phosphorus in our rivers

Gouthwaite Reservoir (2024)

Delivering the successful design and construction of a large diameter emergency drawdown siphon at one of Yorkshire Water’s largest reservoirs

Holderness Flood Alleviation Scheme (2024)

Design and construction of new ‘online’ pumping station and flood storage aquagreen to improve resilience in the Humber region

Red Doles CSO (2024)

The Red Doles Combined Sewer Overflow (CSO) neighbours the Huddersfield Broad Canal and a Network Rail bridge. The CSO serves a catchment covering approximately 3.8km2, predominantly consisting of residential properties and accommodating around 8512 people. The majority of the Fartown area of Huddersfield drainage operates as a combined system, with Red Doles receiving flows from […]

Yorkshire Water P Schemes Portfolio (2024)

Batched P removal portfolio to help achieve WINEP compliance

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. […]

Huddersfield Energy & Recycling Facility (2021)

Sludge treatment in the Huddersfield area was previously provided by incineration at Calder Valley Incinerator, located at Yorkshire Water’s Upper Brighouse Site. This incinerator has been inoperable since a weather event in 2015. Following a strategic review, Yorkshire Water Services (YWS) decided to progress with conventional mesophilic anaerobic digestion (MAD) plant supported by lime sanitisation […]

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 […]

Huddersfield Energy & Recycling Facility (2020)

Huddersfield Energy and Recycling Facility (Huddersfield E&RF) is in Mirfield on Yorkshire Water’s Upper Brighouse site. The project involved the demolition of the existing incinerator and construction of a new mesophilic anaerobic digestion facility that will produce electricity; equivalent to powering 5280 homes once it is fully operational. The primary drivers for the scheme were: […]

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 […]

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). […]