Mapping Mountains - Hill Reclassifications – Y Pedwarau

Carreg y Big (SN 902 909) - 400m Sub-Pedwar deletion

There has been a deletion of a 400m Sub-Pedwar by surveying with the Trimble.  The hill was only listed in this sub category as it has a 394m spot height at the bwlch and a 417m spot height at the summit on the Ordnance Survey enlarged mapping hosted on the Geograph website, with these values giving this hill a drop of 23m.  The spot height at the bwlch on the OS map is on a road, and the position of the critical bwlch is higher than this .  The name of the hill is Carreg y Big (SN 902 909) and is situated in the Pumlumon range.

The hill will be deleted from the Y Pedwarau list in the 2^nd edition that will be hopefully be published by Europeaklist.  The list of Pedwar hills is also available from the Haroldstreet website.

The full details for the hill are:

Cardinal Hill:  Foel Fadian

Summit Height:  417.0m (converted to OSGM15)

Name:  Carreg y Big

OS 1:50,000 map:  136

Summit Grid Reference:  SN 902 909

Drop:  19.7m (converted to OSGM15)

The Trimble GeoXH 6000 on the summit of Carreg y Big

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

Myrddyn Phillips and Aled Williams (April 2014)