Calf Hey Reservoir is a reservoir in Haslingden Grane, close to the town of Haslingden, in the Borough of Rossendale, England. It was the first of three reservoirs in the valley, the others being Ogden Reservoir and Holden Wood Reservoir.

Calf Hey Reservoir
Calf Hey Reservoir at Haslingden
Calf Hey Reservoir Location in Lancashire Show map of Lancashire Calf Hey Reservoir Location in Rossendale Show map of the Borough of Rossendale
Location	Lancashire, England
Coordinates	53°41′51″N 2°22′33″W
Built	1860
References	[1]

Not to be confused with the upper of the two Ogden Reservoirs 11 miles to the north, near Nelson.

References