Construction of eighteen wind turbine bases, each of 540m3 reinforced concrete single pours, for Vestas V90 Turbines. Four of these bases were constructed within the Bord Na Móna peat bog areas.
The construction of eight kilometres of new access roads as well as crane hard standings, with associated drainage and culvert construction works to accommodate the delivery and erection of the turbine components.
Further scope of works included the installation of 22km of ducting between the turbines, the installation of the earthing cables and the civil works for the substation.
The initial contract programme was 20 weeks with actual completion achieved 24 weeks. An extension of time of five weeks was awarded for additional scope of works of having to make the floating crane hard stands ground bearing due to a new requirement by the turbine suppliers to increase the size of the main crane from a 500t to a 1000t.
Within the contract period Sisk also completed a large earthworks operation for Lisheen Mine by excavating 100,000m3 of quarry fill material and hauling for 3.5 kilometres through the wind farm access roads to facilitate the future decommissioning of the mines tailings pond.