Water from the reservoir is fed into Yorkshire Water's grid.
The reservoir was constructed between 1898 and 1904, and is now managed by Yorkshire Water.
Mains water and sewerage services are provided by Yorkshire Water.
Just west of these locks is a long disused rail bridge belonging to Yorkshire Water.
Yorkshire Water has declined to comment but is believed to be refusing to accept liability.
Yorkshire Water has received fines for breaches of environmental law.
Yorkshire Water argued that the blockage causing the offence was caused by a third party.
Yorkshire Water does much to promote recreational use of its reservoirs.
As of 2011, they are maintained by Yorkshire Water.
Yorkshire Water manages the area's drinking and waste water.
