This find comes as a result of a conversation with @tucker whose lead sparked a memory of this outfall that I vaguely recalled passing many years back. A quick recce trip and we have an explore. Tucker justifiably gets naming rights, calling this one 'Old Man River' - I'll let him do the explaining on the name if / when he puts a report up, but for now that is how it shall be known...
This is the outfall of Oxspring Dam in Sheffield (also known, apparently, as Bark Dam; Rawson's Dam & Wards End Dam). The Dam is currently used as a private fishing spot. (Note the people pictured fishing, privately).
After running for a few metres uncovered, the water flows through this slightly winding drain under the road and the five arches of the viaduct. The outflow is on the other side of the road, where the stream runs uncovered until in meets the River Don, flowing through a shallow concreted drain across a public footpath.
Here's the outflow, pictured at some unspecified time in the past... I'll do a M*tthew H*lmes and estimate the date as being something historical, probably before the 1990s ;-)
And here it is more recently....
This was the way in, of course. Gate helpfully open and unlocked...
Just inside there's the main tunnel, leading to the inflow, and the covered tunnel on the right - more of that in a bit...
The tunnel meanders, tunnel like, under the road...
Human beings do their best to wave torches around and make nice pictures of the tunnel to put on the internet...
Until reaching the gated inflow it's time to head back...
Here ends explore one, but that unexplored capped tunnel was still bothering me, so returning with @Esoteric Eric we lifted the lid had a look inside. After a short while the brick tunnel turns concrete and heads upwards to a CSO and processor room.
Getting in your infrastructure...
A short, relaxed and (CSO aside) fairly clean one...
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