 In 2002/03, the dam crest was raised 3 m as the original height would have been overtopped during the Probable Maximum Flood (PMF).This was part of a £6.5 million scheme to make Swinsty, Fewston and Lindley Wood reservoirs meet improved flood standards.The reservoir keeper's house at the dam was originally planned to be demolished during this work, but was built into the new, higher crest as bats were found to be living there.