A Teesdale reservoir is going green with the introduction of a hydro turbine to generate renewable energy.
Northumbrian Water is to install the turbine as part of a more than £3m investment to upgrade existing assets at its Grassholme reservoir, near Mickleton, County Durham.
Grassholme, which is currently full with six million cubic metres of water, is one of several reservoirs supplying treatment works in the Tees area. Water stored in the reservoir will be used to power the turbine, which then produces electricity.
Over the last four months, Northumbrian Water has worked with Northern Powergrid at Grassholme to install about 3km of new electrical cable, extending the national grid.
Work to install new pipes and the hydro turbine is due to start in April, with a planned completion in December. Once completed, the turbine will produce green renewable energy for the site and for export to the national grid.
Northumbrian Water project manager Dean Thompson said: "While we were carrying out the planned upgrade at Grassholme, it made sense to install a hydro turbine to provide power for the site and elsewhere as part of our commitment to creating renewable energy where possible."
The Grassholme project is the latest in a series of renewable energy schemes harnessing the power of water at Northumbrian Water facilities. Hydroelectric stations have been built at Selset Reservoir, near Barnard Castle, Mosswood water treatment works, near Consett, and Kielder Reservoir, in Northumberland.
The hydro power plant at Kielder is the largest of its kind in England, generating some 20,000 megawatt hours of electricity - enough to meet the average annual needs of about 5,000 households.
David Chapman, climate change manager at Northumbrian Water, said: "The project at Grassholme is one of several energy generation schemes Northumbrian Water is currently developing. We believe that creating renewable energy is the responsible way forward for the business, our customers and the environment."