Mapping Mountains – Significant Name Changes – 100m Twmpau and Y Trechol – The Dominant Hills of Wales

Hensol Park (ST 040 790)

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 and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips.

LIDAR image of Hensol Park (ST 040 790)

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

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.

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015.

The hill is adjoined to the Bro Morgannwg group of hills, which are situated in the southern part of South Wales (Region C, Sub-Region C2), and it has a number of minor roads encircling it with the M4 motorway further north and the A4222 road further west, and has the town of Y Bont-faen (Cowbridge) towards the south-west and the town of Llantrisant towards the north.

The hill originally appeared in the 100m P30 list on Geoff Crowder’s v-g.me website under the name of Kennel Grove, which is a name that appears near the summit of the hill on contemporary Ordnance Survey 1:25,000 Explorer maps.

 

Kennel Grove

109m

ST040791

170

151

During my early hill listing I paid little regard to name placement on the map, or the meaning of names and to what feature the name was appropriately applied to.  Therefore I prioritised names for listing purposes that I now understand are either inappropriate or where another name is viewed as being more appropriate.

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

Since publication of these P30 lists on Geoff Crowder’s v-g.me website there have been a number of Ordnance Survey maps made available online, some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website, whilst others are current and digitally updated such as the Vector Map Local hosted on the Geograph website, and which is entitled the Interactive Coverage Map.  In the case of this hill it is the series of Ordnance Survey Six-Inch maps that show the placement of the name Hensol Park to take in the whole area of the hill, whilst that of Kennel Grove is just applicable to the plantation next to, but not at the summit of the hill.

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by in the 100m Twmpau and Y Trechol – The Dominant Hills of Wales is Hensol Park, and the confirmation of the placement of this name was derived from the series of Ordnance Survey Six-Inch maps. 

The full details for the hill are:

Group:  Bro Morgannwg

Name:  Hensol Park

Previously Listed Name:  Kennel Grove

 

OS 1:50,000 map:  170

Summit Height:  108.8m (LIDAR)

Summit Grid Reference:  ST 04027 79085 (LIDAR)

Bwlch Height:  57.4m (LIDAR)

Bwlch Grid Reference:  ST 03531 78660 (LIDAR)

 

Drop:  51.4m (LIDAR)

Dominance:  47.25% (LIDAR)

Myrddyn Phillips (September 2019)