An archaeological landscape survey prior to a proposed extension to Heights Quarry, Weardale, Co. Durham. Heights Quarry was established in the late 19th century by the Weardale Iron Company, for the extraction of limestone, and expanded through the 20th century to its current limits. The northern edge of the quarry has now encroached on Heights Mine, a lead mine established in the late 18th or early 19th century by the Blackett Beaumont Company, which lies immediately to the north-west of the current quarry. The mine was worked for ironstone by the Weardale Iron Company from around 1850, and may have been abandoned in 1868. The walkover survey identified water-management features related to ore dressing (which occurred outside the survey area) and shafts which follow the line of a level, which extends north-eastward through the proposed extension.