25th January 2017
(Above) Ventured into Coire Dubh today for a look at the debris from last Saturday’s full depth avalanche. Coire Dubh is one of the relatively deeply incised coires on the SW flank of the Carn Liath massif.
(Above) The avalanche was about 20m across in the start zone and ran out about 125m with the debris fan widening in the lower reaches. The larger blocks at the toe of the debris are about 1.5m³, big enough to infer some cornice involvement – perhaps the trigger? The area outlined in red was where snow was seen last Friday and although it doesn’t show up in the photo there’s been some ground surface scouring in the start zone as well. The large stone blocks in the toe of the avalanche run out zone were found to be part of pre-existing talus deposits near the bottom of the crag. Still a few old cornices around, too.
The other micro-hydro schemes in the area utilise ‘river-run’ water to generate electricity. The Pattack scheme is storage-based and will entail the construction of a dam part way up the River Pattack which, once commissioned, will produce 9MW of ‘on-demand’ electricity (about 25GWh total per year on average). The dam will have a crest length of circa 125m and be about 18m high, creating a reservoir of 0.15km². The pipe visible in the photo is 2m in diameter and when complete will be buried and be 6.5km in length. During the construction phase the pipeline will require a ‘working corridor’ of up to 40m wide in order to position, join and bury the pipe.
There’s a lot of concrete being poured into some of our remote glens in the pursuit of ‘green’ energy.
Comments on this post
Got something to say? Leave a comment