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Black Law Wind Farm
Black Law, near Forth, Lanarkshire, Scotland
associated engineer
Not known
date  July 2004 - September 2006
era  Modern  |  category  Power Generation  |  reference  NS881530
At completion, Black Law was the UK’s largest wind farm. It is built on the site of an abandoned open cast coal mine, which was rehabilitated into shallow wetlands during construction and now attracts large numbers of breeding birds.
The £90m scheme covers a site area of 1,860 hectares and straddles the borders of three Scottish counties. In addition to installing the turbines, the project included a new sub-station with new and upgraded access tracks — for both works and public access to the site.
The first phase consisted of 42 wind turbines, each with a capacity of 2.3MW — making an output of 96.6MW, or enough to power 70,000 homes. A second phase added another 12 turbines, bringing the total output to 124.4MW.
The ground is glacial till overlain with a thick layer of peat (more than 7m thick in places). Each of the turbines has a 300 cubic metre concrete gravity foundation, which is connected to the steel turbine mast by 120 x 2m long bolts.
Turbines have a tip height of 110m — the height of the hub above ground plus the rotor radius. They produce electricity at 33kV, which is stepped up to 132kV for transfer to the UK's National Grid.
The wind farm began producing electricity in April 2005, and the second phase was completed in September 2006. The scheme was opened officially by Scotland’s Deputy First Minister Nicol Stephen on 12th January 2006.
Black Law is owned and operated by Scottish Power, who were integrated with Iberdrola on 23rd April 2007.
Main contractor: AMEC
Groundworks: Jacks1
Turbine supply: Siemans
Research: ECPK
bibliography
www.bwea.com
www.geo.ed.ac.uk
www.jacks1.com
www.nce.co.uk
www.scottishpower.com
Location

Black Law Wind Farm