Whitelee Wind Farm

Client: Scottish Power Renewables (UK) Ltd
Value: £79.2 million
Location: Near Eaglesham, Glasgow

The project comprised the design and construction of the civil and electrical infrastructure works at Whitelee Wind Farm at an altitude of approximately 300m. Whitelee Wind Farm is the largest single onshore wind farm in Europe, generating 322MW of energy, sufficient to meet the needs of 180,000 homes. Morrison Construction was initially appointed under a consultancy agreement to carry out early contractor involvement services to assist in discharging all planning conditions prior to commencement and an enabling works contract was carried out in preparation for the main works.

The works included a large area of forest clearance, 90km of unsurfaced access roads (66 per cent floating) and 140 turbine bases and hardstandings, together with 986km of power, fibre optic and earthing cables. Furthermore, a substation was built at the Ardoch Rig section of the contract and a control building was built at Loch Goin.

During construction, six working borrow pits were used to generate the road and hardstanding materials (2,500,000 cubic metres), and an on-site concrete batching plant was employed, supplying 50,000 cubic metres of concrete for WTG bases.

The site covered an area of approximately 5,700 hectares and spans three local authority areas, namely East Renfrewshire, East Ayrshire and North Lanarkshire.

In addition, approximately a third of the site is built within a Scottish Water reservoir catchment area and a number of turbines were built as close as 150m from the reservoir which necessitated strict environmental controls. A significant depth of peat existed at a number of the turbine foundations (in some locations greater than 9m) which necessitated special measures to construct bases and crane hardstandings in liquid peat conditions, at 28 separate locations.

The contract was completed on schedule (28 July 2009), following a 144-week construction period and has gone on to received a Project and an Environmental Commendation from the Saltire Society.

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