Moel Bowydd (SH 712 470) - Uchaf addition
There has been a new addition to the ranks of Yr Uchafion instigated from analysis of
LIDAR data by Aled Williams and subsequently confirmed via a survey with the Trimble GeoXH 6000. Yr Uchafion is the draft title for a
list of the Welsh 500m P15s that takes in all hills in Wales at or above 500m
that have a minimum drop of 15m, the list is a joint compilation with Aled
Williams, with the details relating to this list being published on the Mapping Mountains site in November 2015.
This hill is given an uppermost 490m ring contour
with no spot height on current Ordnance Survey maps and has bwlch contouring
between 480m – 490m, and prior to the analysis of LIDAR data the hill was not
classified.
The hill is adjoined to the Arennig group of hills with its Cardinal Hill being Manod Mawr (SH 724 446) and is placed in
the Region of North Wales (Region A, Sub-Region A3), and is situated with the
town of Blaenau Ffestiniog to the south-west
and is positioned above the Afon Bowydd
which is to its south and which emanates from Llyn Bowydd which is to the east of the hill.
The hill can be accessed via public footpaths from
its west, east and south, with Blaenau Ffestiniog
being a good starting point for an ascent; an alternate and longer ascent can
start from above Llan Ffestiniog
using a track beside the course of the Afon
Teigl. However, the summit of this
hill is not on open access land, therefore permission should be sought to
visit, but as the summit is relatively close to a public footpath and with open
access land to its immediate north, common sense should prevail and if wanting
to visit the summit of the hill there is likely to be no objection to doing so.
The name of the hill is Moel Bowydd and its addition to Uchaf
status is due to analysis of LIDAR data by Aled Williams. LIDAR (Light Detection & Ranging) is highly
accurate height data that is now freely available for much of England and
Wales.
Aled’s analysis of LIDAR data gives the hill the
following details:
Moel Bowydd
Summit Height: 500.6m
Summit Grid Reference:
SH 71276 47053
Bwlch Height: c 485m
Bwlch Grid Reference:
SH 71586 47206
Drop: c 16m
Although the area of the bwlch is not covered by
LIDAR data, 1m contouring shows that the bwlch is lower than 485m, which gives
this hill sufficient drop to qualify as an Uchaf. Therefore, the 500.6m LIDAR data produced for
the summit position at SH 71276 47053 and
with 1m bwlch contouring showing that the height of the bwlch is below 485m, giving this give a drop of more than 15m, with the details from the Trimble GeoXH 6000 survey being 500.5m (converted to OSGM15) summit at SH 71272 47051 and 482.4m (converted to OSGM15) bwlch at SH 71603 47208, giving this hill 18.1m of drop.
The full details for the hill are:
Cardinal Hill: Manod
Mawr
Summit Height: 500.5m
(converted to OSGM15, Trimble data)
Name: Moel Bowydd
OS 1:50,000 map: 115
Summit Grid Reference:
SH 71272 47051
Drop: 18.1m (converted to OSGM15, Trimble data)
This now brings the overall total for Yr Uchafion / The Welsh 500m P15s to 631 hills with the overall
total for the 500m Sub-Uchaf category
remaining at 25.
The additions, reclassifications and deletions to Yr Uchafion / The Welsh 500m P15s
reported on Mapping Mountains are as follows:
UCHAF ADDITIONS
Moel Bowydd (Trimble data) (SH 71272 47051) added as an Uchaf with 18.1m of drop
500m SUB UCHAF RECLASSIFICATIONS TO UCHAF
UCHAF RECLASSIFICATIONS TO 500m SUB-UCHAF
UCHAF RECLASSIFICATIONS TO 490m SUB-UCHAF
UCHAF DELETIONS
 |
| Moel Bowydd (SH 712 470) is now classified as an Uchaf |
Myrddyn Phillips and Aled Williams (April 2017)
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