Lying across the borders between three council areas, South Lanarkshire, North Lanarkshire and West Lothian, 2½ miles (4 km) west of Forth, Black Law became the largest operating wind farm in the UK when it was officially opened in 2006 by Deputy First Minister Nicol Stephen (b.1960). Costing £90 million and occupying a tract of moorland, pasture and forest together with the site of an abandoned open-cast coal mine, the farm comprises 42 three-bladed turbines with a total generation capacity of 97 megawatts (MW). Permission has been given to add a further twelve turbines to the site, bringing the total capacity to 142.6 MW.
The farm is owned by Scottish Power, a privatised utility which now forms part of a multi-national energy group.