Samenvatting
During the period covered by the report- July 1, 1978 to June 30, 1979- the Hi-dro Cushion cell and inertial barriers units had received nearly the same number of impacts. The average cost to repair a Hi-dro cell unit was $ 405, while the average cost to repair a sand-filled barrier was $ 863. The reason for such a difference in repair costs is one of design.