At least three dead calves and four sheep were found during routine checks near Lough Mourne reservoir, north of Carrickfergus."As well as the potential public health hazards associated with the disposal of animals remains in this way, such incidents also create a needless drain on limited resources and mean that other priority improvements to our services cannot be delivered," NI Water's Maynard Cousley, Water Supply Manager for the area, said.The discovery comes after four serious incidents at the reservoir in the last 12 months, including the dumping of carcasses, asbestos and building waste."While none of the incidents posed a risk to water quality, the additional costs of removing the carcases and repairing the damage are substantial," Mr Cousley added.Heavy-duty gates, installed last year at a cost of nearly £7,000, were damaged in order to facilitate the illegal dumping."Those responsible for this incident went to this site clearly intent on dumping the carcases," Mr Cousley said."The gates they broke down are substantial in both size and weight and you would need some sort of heavy machinery or vehicle in order to cause that kind of damage."NI Water has appealed to the public to report any suspicious activity to the PSNI, or to pass information anonymously through Crimestoppers.