Dôl Gron (SJ 171 137)
There has been a Significant Name Change to a hill that is listed in the 100m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill derived from LIDAR analysis and a subsequent Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
Dôl Gron (SJ 171 137) |
100m Twmpau - Welsh hills at or above 100m and below 200m in height with 30m
minimum drop, with an accompanying sub list entitled the 100m Sub-Twmpau with
the criteria for this sub category being all Welsh hills at or above 100m and
below 200m in height with 20m or more and below 30m of drop, with the word
Twmpau being an acronym standing for thirty
welsh metre prominences and upward.
The 100m Twmpau by Myrddyn Phillips |
Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips |
When the original 100m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was listed under the invented and transposed name of Bryn y Clolyn, with an accompanying note stating; Name from buildings to the South-East.
Bryn y Clolyn | 160c | SJ172137 | 125 | 239 | Name from buildings to the South-East. |
During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day. My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of a house and prefix it with the words Bryn y. This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found.
Extract from the Ordnance Survey 1:25,000 Explorer map |
Richard Morris |
Therefore, the name this hill is now listed by in the 100m Twmpau and Y Trechol – The Dominant Hills of Wales is Dôl Gron and this was derived from local enquiry.
The full details for the hill are:
Group: Carnedd Wen
Name: Dôl Gron
Previously Listed Name: Bryn y Clolyn
OS 1:50,000 map: 125
Summit Height: 165.8m (converted to OSGM15, Trimble GeoXH 6000)
Summit Grid Reference: SJ 17143 13703 (Trimble GeoXH 6000)
Bwlch Height: 109.7m (LIDAR)
Bwlch Grid Reference: SJ 17539 13499 (LIDAR)
Drop: 56.2m (Trimble GeoXH 6000 summit and LIDAR bwlch)
Dominance: 33.87% (Trimble GeoXH 6000 summit and LIDAR bwlch)
Myrddyn Phillips
(September 2021)
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