Plans to deal with one of the most controversial areas of the Dounreay nuclear site are to be accelerated.
Sunk in the 1950s close to the shores of the Pentland Firth, The Shaft plunges 65.4m (214.5ft) below ground.
It has been the subject of local legend, including the claim that one worker dropped his mother-in-law's ashes inside.
Radioactive waste was disposed there from 1959 to 1977, when an explosion ended the practice.
The new executive team at the nuclear complex in Caithness said work on the clean-up would be accelerated.
Swimming pool
In a presentation to staff and sub-contractors, it said there would be a "renewed emphasis" on The Shaft and another area called The Silo - which has been described as being like a swimming pool with a concrete roof.
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