Mapping Mountains - Hill Reclassifications – Y Pedwarau

Cefn Perfa (SO 173 579) - 400m Sub-Pedwar reclassified to Pedwar

There has been a reclassification of a 400m Sub-Pedwar to a Pedwar which has recently been confirmed by a line survey conducted by John Barnard and Myrddyn Phillips.  This survey was prompted by a basic levelling survey conducted in 2003 which gave the hill 97ft / 29.6m of drop.  Subsequently the hill has been surveyed using the Trimble GeoXH 6000 resulting in 30.04m of drop, and now it has been surveyed using the Leica GS15 and a second survey by the Trimble GeoXH 6000 resulting in 30.06m and 30.09m of drop respectively.  The line survey, which is the most accurate for ascertaining the drop value, determined that the hill has 30.06m of drop and therefore its reclassification to a Pedwar is confirmed.  Few 400m hills could have seen so much surveying activity paid to them!  
The hill is named Cefn Perfa (SO 173 579) and it is situated in the Fforest Glud range of hills and is positioned on the outskirts of Llanfihangel Nant Melan.

The hill will be added to the Y Pedwarau list in the 2^nd edition that will 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:  Gwaun Ceste

Summit Height:  411.2m (converted to OSGM15)

Name:  Cefn Perfa

OS 1:50,000 map:  148

Summit Grid Reference:  SO 173 579

Drop:  30.1m (line survey)

Cefn Perfa (SO 173 579) has now been confirmed as a Pedwar

For details on the survey that reclassified this hill to Pedwar status please click {here}

Myrddyn Phillips and Aled Williams (March 2014)