Obviously people are being asked to keep away at the moment. A sinkhole seems unlikely, a culvert collapse where the stream goes under is more likely.
Am not sure where the dam has been put in place but I assume the Whitchurch Arm still has water. As things open up I will go and see what is accessible. Phil (trigpoint) On 22 December 2025 15:14:11 GMT, James Derrick <[email protected]> wrote: >Hi, > >It appears the Llangollen Canal has breached just North of Bridge 31, with a >large washout of the embankment and significant damage to the canal bed. I >hate to think what any boaters afloat suffered, but there are no reports of >casualties. > >This is a significant event for Welsh Waters as the canal is used to transport >drinking water (to Hurleston Reservoir) and lots of boaters (including myself >on several occasions). Reports of a "sink hole" seem unlikely to me, >especially as the breach appears to be close to a stream culvert - a frequent >cause of collapses. > >I've attempted a first-cut to map the damage with an approximate area of the >hole, but tagging canal breaches is somewhat of a challenge, so would >appreciate suggestions! > >barrier=breach - custom as "breach with a big hole" isn't widespread >(thankfully!) >embankment=yes - there is a significant hole caused by water flow >man_made=embankment - more common for data-consumers but debatable man_made >access=no - stop routing, especially for the footway >natural=Canal Breach >start_date=2025-12-21 > >https://www.openstreetmap.org/way/1460520753 > >I'd expect more access controls to be added by CaRT in time (likely fencing, >then plant access tracks), but this is at least a start. > >Happy Holiday Mapping, > > >James >-- >James Derrick > [email protected], Cramlington, England > I wouldn't be a volunteer if you paid me... > https://www.openstreetmap.org/user/James%20Derrick > > >_______________________________________________ >Talk-GB mailing list >[email protected] >https://lists.openstreetmap.org/listinfo/talk-gb
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