<P> Underneath the roundabout a network of underpasses and shops was built (with a central area open to the sky), this formed a complex that was officially designated Castle Square but became affectionately known locally as "Ole in t' Road" or Hole in the Road . A feature in the wall of the central area was a fish tank which contained 2000 gallons of water and usually 20 fish including carp, goldfish, bream, rudds and roaches . </P> <P> Although considered by many to be a major city landmark, like many constructions of its time, it did not age well and was very dilapidated by the early 1990s . It lasted from 1967 until 1994, allegedly being filled in with the rubble from the recently demolished Hyde Park Flats . </P> <P> In 1994, as part of the works for the construction of Sheffield's new Supertram network, the underground portion of the Hole in the Road was filled in . The roundabout was removed and the whole area landscaped . All three lines of the Supertram system cross the square and call at Castle Square tram stop, one of five tram stops in the city centre . </P>

When was the hole in the road sheffield built