Mapping Mountains – Significant Name Changes – The Welsh P15s

Melin y Borth (SH 448 934) 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Melin y Borth (SH 448 934)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north, a minor road to its south and the A5025 road to its west, and has the town of Amlwch towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed by the name of Mona Mill, with an estimated c 14m of drop, based on an estimated c 33m summit height and an estimated c 19m bwlch height, with both heights based on interpolation of 5m contouring that appear on the Ordnance Survey 1:25,000 Explorer map. 

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

The name of Melin y Borth is taken from online sources and substantiated by present day documentation, some of which is given by Coflein, which is the online database for the National Monuments Record of Wales and also by a number of other online sites, including Wikimedia Commons. 

In such instances and especially so for such a low heighted and low prominence hill it is appropriate to use a name given to an inanimate object for that of the hill, as this is one of if not the main named feature on this hill. 

Therefore, the name this hill is now listed by in The Welsh P15s is Melin y Borth and this was derived from online sources including Coflein. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Melin y Borth

Previously Listed Name:  Mona Mill 

OS 1:50,000 map:  114

Summit Height:  34.1m (LIDAR)                                                           

Summit Grid Reference:  SH 44859 93412 (LIDAR) 

Bwlch Height:  19.4m (LIDAR) 

Bwlch Grid Reference:  SH 44761 93327 (LIDAR) 

Drop:  14.8m (LIDAR) 

 

Myrddyn Phillips (June 2021)