[urban caveman]

yeah D, i went through that culvert a couple of years back, sadly no photos as i was just getting in to exploring at the time and didn't have decent lighting or camera. we entered it near the viaduct where the tunnel heads under the arndale and came out just down the street from the jobcentre, the tunnel actually split 2 ways just before coming out at the jc with the other end coming out between the new accy pals health centre and the skatepark. There is a section under there that dosen't look very stable. i work with a guy that was involved in the refurb of the market hall a few years ago and he says that the culvert also runs under the market. i cant confirm this though as it twists and turns under the ground so its hard to keep track of where things would be above. if people are interested i dont mind taking another trip under there to get some photos.