WORK to repair a large hole in Scarborough’s Lighthouse Pier has been completed and contractors have used the latest radar equipment to check for any potential repairs to the structure.
The 10ft hole, which appeared just before Christmas, was filled with aggregate before paving flags were replaced on the pier surface earlier this week.
And on Thursday workers used a technique known as Impulse Radar to carry out a non-destructive geophysical investigation to check for other holes in the pier.
John Riby, Scarborough Council’s head of technical services said: “The hole that was discovered on Christmas Eve has now been filled with free draining aggregate and overlaid with stone flags to return the area to its original condition.
“As part of the works, we are carrying out a ‘ground penetrating radar’ survey of the pier. In adopting a common sense approach, we are checking the rest of the pier for any other hidden voids as a precautionary measure.”
The survey was carried out over paved areas of the pier and the survey equipment recorded the time taken for radio pulses to travel between various material layers of the pier in order to determine the extent of any further holes within its construction.
Last month, Cllr Tom Fox revealed that the repairs would cost less than £10,000 when he read out a statement by Cllr Peter Popple, the cabinet member for harbours and land, to a full meeting of Scarborough councillors.
The cause was identified as loose stone fill being washed out through holes, and it was believed that the problem had been made worse by recent heavy seas which had battered the pier – leading to the surface collapse by weakening or washing away the loose material which had supported it.
During initial inspections of the damage, experts used a rigid inﬂatable boat to inspect the breach.
Large metal barriers, complete with warning signs, were put in place between the lighthouse and the First World War memorial gun to protect members of the public. At the time of the collapse, Mr Riby stressed that the pier was still structurally sound.
There was a similar collapse around 1993.