Parndon Moat Marsh | Harlow CouncilParndon Moat Marsh is a Scheduled Ancient Monument. The eastern side was once Burnt Mill sewage works, abandoned around 1950. The ground is still rich in nutrients, encouraging nettles to grow. The site contains an original moat, drainage ditches, sedge beds and ponds.Parndon Moat Marsh is a Scheduled Ancient Monument. The eastern side was once Burnt Mill sewage works, abandoned around 1950. The ground is still rich in nutrients, encouraging nettles to grow. The site contains an original moat, drainage ditches, sedge https://www.harlow.gov.uk/parks-and-culture/parks-and-green-spaces/marshes-and-meadows/parndon-moat-marsh