The Derwent Dam was used by pilots of the Dambusters to practising low-level flying in preparation for Operation Chastise

References

• https://www.iwm.org.uk/history/the-incredible-story-of-the-dambusters-raid
• https://www.dambusters.org.uk/museum.htm
• https://www.peakdistrict.gov.uk/visiting/miles-without-stiles/derwent-dam
• https://www.rafbf.org/dambusters