It was stated in a statutory report, under the Reservoir Safety Act 1975, dated 12 June, that all five reservoirs could be overtopped during a Probable Maximum Flood. Woodhead, as the fountainhead, would require the most extensive improvements, but Torside needed crest remedial work. The wave wall was demolished and replaced with one 4 metres (13 ft) above the overflow sill. The claycore was extended to 1.34 m (4 ft 5 in) above overflow sill and the road level was raised to 3.29 m (10.8 ft). The work took place between 1993 and 1994.[2]
