2003 Derrybrien landslide

The 2003 Derrybrien landslide was a landslide which occurred on 31 October 2003 on the side of the hill called Cashlaundrumlahan, near Derrybrien in Ireland. The landslide was focused around turbine 68 in the Derrybrien wind farm, and disrupted further construction. It dislodged 450,000 cubic metres of peat[1] after days of dry weather. While initially coming to rest 2.5 km away, it moved further three weeks later when rains came, entering the "Derrywee River" or Abhainn Da Loilioch,[2] and eventually spilled 20 km away into "Lough Cutra".[3] The lake was also the source of the townland of Gort's drinking water, and this caused disruptions to supply.[2] An impact assessment on the wildlife within the lake determined that more than 50 per cent of fish in the lake had been killed due to this pollution, about 50,000 fish of all ages and species groups had perished. A smaller peat slide near turbine 17 had occurred prior to the main movement on the 16th but it did not result in the suspension of the construction of the wind turbine farm.[3]

In 2004, engineering companies were convicted of being responsible for the pollution,[4] while the wind farm company was acquitted.[5] The Irish government was convicted in 2008 of poor oversight.[1]