Wednesday, 20 May 2015

Mapping Mountains – Hill Reclassifications – Y Pedwarau

Pt. 422.3m (SO 073 822) - Pedwar reclassified to 400m Sub-Pedwar

There has been a reclassification of a Pedwar to 400m Sub-Pedwar status by surveying with the Trimble.  The hill is situated in the Pegwn Mawr range of hills and is positioned just to the west of the A483 between the small communities of Dolfor and Llaithddu.

The hill appeared under the Pt (point) notation in the 1st edition of Y Pedwarau (Europeaklist 2013) with the moniker of Pt. 424m (SO 073 822) being used.

On current Ordnance Survey maps this hill has a 424m spot height at its summit and a 393m spot height at its bwlch, these values gave the hill 31m of drop.  The summit consists of cropped grass with a narrow but elongated conifer plantation just to its north-west, whilst the bwlch has an embankment on it which runs in the hill to hill direction.  The Trimble was set up at the base of the embankment as this was judged to be man-made.  If not for doing this the overall drop for the hill would be less than that surveyed.

This now brings the overall total for the Y Pedwarau to 451 hills with five additions and one reclasification to 400m Sub-Pedwar status 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 Haroldstreet website.

The full details for the hill are:

Cardinal Hill:  Pegwn Mawr

Summit Height:  422.3m (converted to OSGM15)

Name:  Pt. 422.3m

OS 1:50,000 map:  136

Summit Grid Reference:  SO 073 822

Drop:  29.0m (converted to OSGM15)

Pt. 422.3m (SO 073 822) now reclassified to a 400m Sub-Pedwar

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

Myrddyn Phillips and Aled Williams (May 2015)

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