The reservoir and associated water treatment works are owned by United Utilities.

Although initially privately owned, the reservoir is now owned by the town of Spencer.

Both dam and reservoir are owned by the Corps of Engineers.

The reservoir is now owned and managed by Thames Water.

Both dam and reservoir are owned and operated by the Bureau.

The covered, unmanned reservoir is now owned by Thames Water.

Both dam and reservoir are owned and operated by the city government of Springfield.

The reservoir and the land below the 1,200 foot (366 m) contour are owned by the Authority.

The reservoir is owned by United Water, a private utility.

The reservoir, which was constructed in 1877, is owned and operated by Northumbrian Water.