Mapping Mountains – Significant Name Changes – 100m Twmpau

The Pimple (SJ 299 472)

There has been a Significant Name Change to a hill that is listed in the 100m Twmpau, and the following details are in respect of a hill that was surveyed with the Trimble GeoXH 6000 on the 20^th October 2015.

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

100m Twmpau - All Welsh hills at and above 100m and below 200m in height that have 30m minimum drop, with an accompanying sub category entitled the 100m Sub-Twmpau taking in all Welsh hills at and above 100m and below 200m in height that have 20m and more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward.

The hill is a part of the Moel y Gamelin range; this group of hills are situated in the north-eastern part of north Wales.  The hill is positioned above the B 5426 and B 5605 roads and is situated on the northern outskirts of Rhosllanerchrugog.

The Trimble GeoXH 6000 gathering data at the summit of The Pimple

Prior to the survey with the Trimble GeoXH 6000 the hill was not classified as it had not appeared in any known listing of hills.  Therefore, although there is no change in this hill’s listed name it is worth categorising under the heading of Significant Name Changes as the name this hill is now listed by comes from local enquiry, with the hill's height and classification being confirmed by the survey with the Trimble GeoXH 6000.   

    

Extract from the current Ordnance Survey 1:50,000 Landranger map

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

Therefore, the name this hill is now listed by in the 100m Twmpau is The Pimple, and this is a locally known name for the summit of the hill and is known as such by the family who live in the house directly below the hill to the west, beside the area of the hill’s bwlch.  The house used to be the office of the old mine that operated on a part of the hill, with the family of the current residents having lived here for five generations and with the name of The Pimple having been used for many years. 


The full details for the hill are:

Group:  Moel y Gamelin

Name:  The Pimple

Previously Listed Name:  Previously not classified 

Summit Height:  153.5m (converted to OSGM15)

OS 1:50,000 map:  117

Summit Grid Reference:  SJ 29984 47262 

 

Drop:  25.2m (converted to OSGM15)

For details on the survey of The Pimple

Myrddyn Phillips (September 2016)