The reservoir was created to supplement the Elan Valley pipeline, which brings wonderful Welsh water all the way to Birmingham to supply our customers.
Before the reservoir was built the land belonged to part of Eymore Farm, and so was mainly agricultural in use.
The construction on the reservoir started in 1964 and was completed in 1968.
The top reservoir provides water to the Elan Valley Aqueduct which in turn supplies water to Birmingham, Mamble and Tenbury.
The reservoir has no natural feed, and so the water is pumped from the nearby River Severn. This is then spread over the collecting pool, and piped to the waterworks to be treated and filtered.
The reservoirs’ perimeter is 29 acres and it is approximately 3ft deep. This increases to 40ft by the valve tower.
Trimpley is ideal for bird watching. During autumn and spring, gulls, waders and terns pause here on migration. Other birds you might see throughout the year are kingfishers and grey herons. Eymore Wood also shelters a variety of birdlife, including pheasants, cuckoos and woodpeckers.