Chudleigh wrote:But what are we looking at? Is it the confluence of two culverted streams? Is it Victorian?
It's the old outfall for the Pinkston Burn.
The burn does not appear to be natural, instead appears to have been built linking the Clyde and Forth canal to the Kelvin, possibly as a relief for water levels. The old watercourse is now used as a sewer. The tunnel goes on for a some distance before a small overflow chamber is reached. The burn used to empty directly into the River Kelvin but it looks like a new section of sewer and a dam were built in order to direct the sewage to a treatment works somewhere, meaning the old outfall section now remains dry until it rains, allowing the sewer to overflow and thunder down to the Kelvin again. Not sure where the sewer goes but after the overflow chamber it takes a steep downhill gradient and disappears, presumably running under the River Kelvin at some point.
Text © David B aka PyroninjaChudleigh wrote:And how many more of these have you explored?
Just the Pinkston. And that was quite enough, thank you.