A flood prevention scheme was prepared for the community council by Keith Henry with help from Roddy Ross, and over the summer the work was completed under their supervision.
The community council wants to thank John Duffy of ‘Paths For All’ and Stirling Council’s ‘Community Pride Fund’ for each providing a sum of £1500 to fund the work. We also need to thank the practical help provided by Gardner Plant of Bridge of Allan in the construction of the scheme, and the landowner Tillicoultry Quarries Ltd, who gave us permission to carry out the work on their land.
The flooding problem was on the path adjacent to the pond which lies about 300m SW of the Quarry Rd gate. After heavy rain the pond overflowed onto the path and took weeks and sometimes months to drain away. In the meantime this important ‘core path’ was impassable as the water was certainly well above ‘wellie’ depth. It appears that the problem may have been caused originally when a pipe was damaged during landscaping operations carried out by the quarry company,Tarmac.
The scheme has involved the construction of two new ‘chambers’ (shafts constructed over the pipe with an open grill at the surface). One chamber was built near the pond, and a second one at a location about halfway towards the Quarry Rd gate, where it was suspected the original pipe had been damaged. Unfortunately, the length of pipe from the second chamber to the outfall sump at the top of Quarry Rd appears to be partially blocked, and it was impractical for us to clear it.
The intention is that in a flood, the water will flow reasonably freely between the first chamber (at the pond) and the second chamber. If the water then cannot drain through the pipe at the second chamber because of blockages downstream, it will spill out of the open grill, onto the path and subsequently into the sump at the top of Quarry Rd. To ease this, the drainage ditches at the side of the tarmac surfaced path have been improved.
Hopefully, this should lead to a big reduction in the path blockage duration this coming winter, but we will continue to monitor and suggest further improvements if necessary.