A crack in the wall of Mohale dam in Lesotho, one of the world's highest rockfill dams, has sparked concern among neighbouring communities, according to a local NGO. Heavy rain in the mountain kingdom led to a sudden filling of the Mohale dam, part of the Lesotho Highlands Water Project (LHWP), creating a crack in one of the panels of the 145 m high wall. "An expert in dam construction from Europe is arriving in Lesotho next Monday to assess the damage ... at the moment it is hard to make any assessments ... because the dam is still filled to capacity. We are, however, hoping that the water level will go down in time to see how far the crack has gone," said Liphapang Potloane, chief executive of the Lesotho Highlands Development Authority (LHDA), reports Alertnet.