Mapping Mountains – Significant Name Changes – 200m Twmpau

 

Coed Ffridd Fawr (SH 869 033) 

There has been a Significant Name Change to a hill that is listed in the 200m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill initiated by Joe Nuttall who produced a summit analysis programme using LIDAR, and then by LIDAR analysis initially conducted by Jim Bloomer and subsequently by Myrddyn Phillips. 

LIDAR image of Coed Ffridd Fawr (SH 869 033)

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

200m Twmpau - Welsh hills at or above 200m and below 300m in height with 30m minimum drop, with an accompanying sub list entitled the 200m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 200m and below 300m 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 hill is adjoined to the Carnedd Wen group of hills which are situated in the south-eastern part of North Wales (Region A, Sub-Region A4), and it is positioned with a minor road to its north and the A470 road to its south, and has the village of Llanbryn-mair towards the east south-east. 

Extract from the Ordnance Survey 1:25,000 Explorer map

The hill appeared in the original Welsh 200m P30 list on Geoff Crowder’s v-g.me website, under the name of Ffridd Fawr, which is a prominent name that appears close to this hill’s summit on the contemporary Ordnance Survey 1:25,000 Explorer map and is more applicable to the land where the 242m map spot height appears.

Ffridd Fawr

242m

SH869034

135/136

215

 

LIDAR analysis has confirmed the relocation of this hill’s summit to land comprising a part of Coed Ffridd Fawr, although online logs report that this part of the forestry has now been felled.  The names of Ffridd Fawr and Coed Ffridd Fawr appear on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, however the summit of this hill is on land named Coed Ffridd Fawr. 

Therefore, the name this hill is now listed by in the 200m Twmpau is Coed Ffridd Fawr, and this was derived from the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map. 

 

The full details for the hill are:

Group:  Carnedd Wen

Name:  Coed Ffridd Fawr

Previously Listed Name:  Ffridd Fawr   

OS 1:50,000 map:  135, 136

Summit Height:  244.0m (LIDAR) 

Summit Grid Reference:  SH 86944 03372 (LIDAR) 

Bwlch Height:  213.5m (LIDAR) 

Bwlch Grid Reference:  SH 87416 03786 (LIDAR) 

Drop:  30.5m (LIDAR) 

 

Myrddyn Phillips (November 2021)