Following a dispute over who owned the rights to the land, construction of the reservoirs started in 1913, but was interrupted because of the outbreak of the First World War, and did not restart until 1920.
Four years later, workers noticed a land slip north of the reservoir site while digging a channel, which required a 50-foot drain and removing 400,000 cubic yards of soil to fix.
[3] Ground movement continued to be problematic after the reservoir began to be used, and required further remodelling the landscape and removing another 160,000 cubic yards of soil.
In 2012, a group set up a camp by the reservoir and built a rope swing for people to dive into the water.
Yorkshire Water condemned the action, highlighting the reservoir has a strong current that could prove fatal even for experienced swimmers.