Tuesday, 17 November 2015

Mapping Mountains – Summit Relocations – 100m Twmpau

Wynnstay Park (SJ 309 429) 

There has been a Summit Relocation for a hill that was originally surveyed for 100m Twmpau (thirty welsh metre prominences and upward) status, and which was initiated by surveying with the Trimble GeoXH 6000, with these details being retrospective as the survey that resulted in this summit relocation was conducted on the 20th October 2015.

The survey was conducted in the eastern part of the Moel y Gamelin range of hills, on the south-eastern outskirts of Rhiwabon (Ruabon), with the hill being situated on the old country estate of the Wynn family; the estate house has now been converted to flats and private houses.  Access to the hill is easy from the north as a paved road leads to its summit.  Parking can either be found adjacent to Broth Lodge at the entrance to the old estate or if wanting a quick visit a car can be driven up the road and parked within 100 metres of the high point of the hill.

The name of the hill is Wynnstay Park and prior to the survey with the Trimble GeoXH 6000 the summit position was listed as SJ 310 430, this is where the 141m spot height appears on the Ordnance Survey 1:25,000 Explorer map.  However, the high point of this hill is south south-westward from where the spot height appears on the ground.

Therefore the position of the relocated summit is at SJ 30990 42931 and is beside a fence next to the remains of a tree root.  The summit is the top of a field that resembles a grass verge as the continuation of the paved road from the estate entrance to the old estate house is only a few metres from it.  This position is not given a spot height on current Ordnance Survey maps and it is approximately 85 metres south south-westward from the previously listed summit position.

The full details for the hill are:

Cardinal Hill:  Moel y Gamelin

Summit Height:  141.2m (converted to OSGM15)

Name:  Wynnstay Park

OS 1:50,000 map:  117

Summit Grid Reference (New Position):  SJ 30990 42931
Drop:  c 14m

The Trimble GeoXH 6000 gathering data at the new summit position of Wynnstay Park, with the old position of the summit beyond the gate in the background of this photograph

For  For details on the survey that relocated the summit of this hill please click {here}

Myrddyn Phillips (October 2015)

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