Mapping Mountains – Hill Reclassifications – Y Trichant

Mynydd yr Heol (SO 107 601) – Sub-Trichant reclassified to Trichant

There has been a Hill Reclassification to the listing of Y Trichant due to a survey with the Trimble GeoXH 6000, with the survey that resulted in this hill reclassification taking place on the 3^rd October 2017.

The criteria for the listing this hill reclassification affects are:

Y Trichant – All Welsh hills at and above 300m and below 400m in height that have 30m minimum drop.  With an accompanying sub category entitled the Sub-Trichant consisting of all Welsh hills at and above 300m and below 400m in height that have 20m and more and below 30m of drop.  The list is authored by Myrddyn Phillips and the Introduction to the list and its re-naming was published on Mapping Mountains on the 13^th May 2017.

The name of the hill is Mynydd yr Heol and it is situated in the Fforest Glud range of hills which are in the eastern part of Mid and West Wales (Region B, Sub-Region B1), and the hill is positioned between the town of Llandrindod (Llandrindod Wells) to its west and the small community of Hundred House to its south.

Mynydd yr Heol (SO 107 601)

The hill was listed in the sub category that accompanied the original Welsh P30 lists when published on Geoff Crowder’s v-g.me website, this sub category has now been standardised and drop values also added, this hill was subsequently listed with 27m of drop based on the 382m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps and a 355m bwlch spot height that appears on the Ordnance Survey Interactive Coverage Map hosted on the Geograph website.

Extract from the Ordnance Survey Interactive Coverage Map hosted on the Geograph website

As the summit of the hill is not on designated open access land permission to visit should be sought, for those wishing to do so the nearest public footpath is south of the summit and passes over its bwlch in a west – east direction.  However, the easiest and most convenient ascent is from the east following a green track up the hill from the convenience of a minor lane.

The survey with the Trimble GeoXH 6000 produced a summit height of 386.8m (converted to OSGM15) and a bwlch height of 355.6m (converted to OSGM15), with these values giving this hill 31.2m of drop, which confirms this hill’s reclassification to Trichant status and the total in the Y Trichant will be updated accordingly.

The full details for the hill are:

Cardinal Hill:  Gilwern Hill

Summit Height:  386.8m (converted to OSGM15)

Name:  Mynydd yr Heol

OS 1:50,000 map:  148

Summit Grid Reference:  SO 10793 60177 

        

Drop:  31.2m (converted to OSGM15)

Gathering data with the Trimble GeoXH 6000 at the summit of Mynydd yr Heol

For details on the survey that reclassified this hill to Trichant status

Myrddyn Phillips (December 2017)