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Kirkthorpe Hydropower Scheme

Kirkthorpe Hydropower scheme situated on Kirkthorpe Weir on River Calder, near Wakefield, South Yorkshire.

Kirkthorpe Hydropower scheme is Yorkshire’s largest-ever low head hydro-electric scheme and is situated on the largest weir in West Yorkshire. JNP Group were commissioned to provide structural and civil engineering services on the project.

The scheme consists of a single Kaplan turbine which is estimated to produce 2.4 million kilowatt-hours per annum, equivalent to the consumption of 800 households.

Sheet piles have been installed to create a cofferdam alongside the weir, and extensive temporary works propping allowed excavation and construction of the reinforced concrete channel within the cofferdam. Once the construction is complete the cofferdam will be flooded and the inlet and outlet sheet piles burned off.

As part of the scheme, a fish pass has being constructed, some 3.8m wide, which will allow safe passage of migratory fish upstream. Fish traveling downstream will be prevented from entering the hydro scheme by the custom built inlet screen.

JNP Group services provided:

  • Civils design including sheet piles, anchor piles, ties and cofferdam.
  • Reinforced Concrete (RC) retaining walls.
  • In situ RC works (concrete channel, suspended slabs, walls, and structural capping beams).
  • Structural steelwork (intake screen, permanent propping).
  • Secondary steelwork (stairs, ladders, walkways).
  • Access track.
  • Substation foundations.
  • All RC detailing works.
  • Design guidance for repairs to failed sluice gate.
  • Principal designer role.

Project Value: £5.3m

Client: Yorkshire Hydropower Ltd

Consultant: ANF Consulting Ltd

CategoryGreen Energy
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