The proliferation of lucrative yet often ill-planned and destructive mini hydro power plants in the wet zone region has been a serious environmental and social concern, as these projects can destroy endemically rich and biodiverse habitats in fragmented forest patches, while causing problems with the water supply for neighbouring settlements. EFL investigated many cases of destructive mini hydropower plants, including a project on the Koskulana River, bordering Sinharaja Forest Reserve which eventually led to litigation against the project developers. In