Sunday, 24 May 2015

Mapping Mountains – Hill Reclassifications – Y Pedwarau

Wenallt (SN 933 571) - Pedwar reclassified to 400m Sub-Pedwar

There has been another reclassification of a Pedwar to a 400m Sub-Pedwar by surveying with the Trimble geoXH 6000, the second in a week.  The hill is situated in the Elenydd range of hills and is positioned north-west of the B4358 between Newbridge-on-Wye and Beulah.  It can easily be accessed on minor roads leading from close to Glandulas (SN 948 531).

The hill is named Wenallt (SN 933 571) and is given 30m of drop on current Ordnance Survey maps, with a 468m spot height at its summit and a 438m spot height at its bwlch, with the latter appearing on the enlarged mapping hosted on the Geograph map.  The survey with the Trimble GeoXH 6000 resulted in a 466.4m (converted to OSGM15) summit height and a 438.1m (converted to OSGM15) bwlch height; with these values give the hill 28.3m of drop.

This now brings the overall total for the Y Pedwarau to 450 hills with five additions and two deletions since publication of the list by Europeaklist in May 2013.  The hill will be taken out of the main list and added to the 400m Sub-Pedwar list in the 2nd edition that is planned for publication by Europeaklist.  The list of Pedwar hills is also available from the Haroldstreetwebsite.

This hill is an example where prominence should not dictate all (try saying that if you’re a hill list compiler!), as it is a fine hill which is situated in open moorland and can be combined with its neighbours of Y Garth, Allt y Ddinas, Lan Fawr and Gornoeth to make a worthwhile circuit.

The full details for the hill are:

Cardinal Hill:  Gorllwyn

Summit Height:  466.4m (converted to OSGM15)

Name:  Wenallt

OS 1:50,000 map:  147

Summit Grid Reference:  SN 933 571

Drop:  28.3m (converted to OSGM15)

Wenallt (SN 933 571) now reclassified from a Pedwar to a 400m Sub-Pedwar

For details on the survey that reclassified this hill from Pedwar status to 400m Sub-Pedwar status please click {here}

Myrddyn Phillips and Aled Williams (May 2015)

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