Monday, 9 January 2017

Mapping Mountains – Significant Name Changes – Y Pedwarau and Y Trechol - The Dominant Hills of Wales

Clepyn Melyn (SN 961 464)

There has been a Significant Name Change to a hill that is listed in the Y Pedwarau and Y Trechol - The Dominant Hills of Waleswith the summit height and dominance of the hill being confirmed by a survey with the Trimble GeoXH 6000 which was conducted on the 28th December 2016, with the hill previously analysed via LIDAR data by Aled Williams.

The criteria for the two lists that this name change applies to are:

Y Pedwarau These are the Welsh hills at and above 400m and below 500m in height that have 30m minimum drop.  The list is co-authored by Myrddyn Phillips and Aled Williams, with the introduction to the Mapping Mountains publication of this list appearing on the 30th January 2017.

Y Trechol - The Dominant Hills of Wales - These are the Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those addition Welsh P30 hills whose prominence is 33% or more and below 50% of their absolute height.  The list is authored by Myrddyn Phillips.

The hill is a part of the Mynydd Epynt range, this group of hills is situated in the south-eastern part of Mid and West Wales (Region B, Sub-Region B-2), and is positioned above the B 4519 road and between the small communities of Garth to its north and Upper Chapel to its south-east. 

Clepyn Melyn (SN 961 464)

The hill appeared in the 400m P30 list on Geoff Crowder’s website under the name Mynydd Eppynt, which is the composition of the name that appeared relatively close to the summit of the hill on Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps of the day.  

Mynydd Eppynt
    Marilyn.   Clem/Yeaman.

Hill list authors are prone to list a hill by the name that appears nearest to its summit on Ordnance Survey maps, without much consideration for its local or historical confirmation, or whether map placement is appropriate, and in the case of Mynydd Eppynt (the name is now presented on Ordnance Survey maps with a single ‘p’ as Mynydd Epynt) the name is more appropriately associated with the hill range rather than an individual hill.  However, place-name data can be improved by asking local people and examining historical documents, and in the case of this hill it was a local farmer who gave the name Clepyn Melyn for land near to the summit of the hill, which to the authors knowledge is the main named feature of this hill and therefore appropriate to use for listing purposes.

Therefore, the name this hill is listed by in Y Pedwarau and Y Trechol - The Dominant Hills of Wales is Clepyn Melyn and this was derived from local enquiry.

The full details for the hill are:

Group:  Mynydd Epynt

Name:  Clepyn Melyn

Previously Listed Name:  Mynydd Eppynt 

Summit Height:  475.7m (converted to OSGM15)

OS 1:50,000 map:  147

Summit Grid Reference:  SN 96124 46428 
Drop:  c 198

Myrddyn Phillips and Aled Williams (January 2017)

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