Moel y Crio (SJ 199 696)
There has been a Summit Relocation to a hill that is listed in the 200m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips with assistance from Mark Trengove.
 |
| Moel y Crio (SJ 199 696) |
The criteria for the list that this summit relocation applies to are:
200m Twmpau – Welsh hills at or above 200m and below 300m in height that have 30m minimum drop, with an accompanying sub list entitled the 200m Sub-Twmpau, with the criteria for this sub category being all Welsh hills at or above 200m and below 300m 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.
 |
| The 200m Twmpau by Myrddyn Phillips |
The name the hill is listed by is Moel y Crio, and it is adjoined to the Moel y Gamelin group of hills, which are situated in the north-eastern part of North Wales (Region A, Sub-Region A2), and it is positioned encircled by minor roads with the B5123 road farther to its east, and has the town of Yr Wyddgrug (Mold) towards the south-east.
When the original 200m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category.
After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with an estimated c 14m of drop, based on the 292m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map at SJ 20083 69520 and an estimated c 278m bwlch height, based on interpolation of 5m contouring between 275m – 280m that appear on the Ordnance Survey 1:25,000 Explorer map.
 |
| Extract from the Ordnance Survey 1:25,000 Explorer map |
However, it was not until the Trimble GeoXH 6000 survey that the details for this hill could be accurately re-assessed. The summit height produced by this survey is 297.5m and is positioned at SJ 19988 69614, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:
The term Summit Relocations applies to when the high point is positioned in a different field, to a different feature such as a conifer plantation, within a different map contour, a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.
 |
| The Trimble GeoXH 6000 gathering data at the summit of Moel y Crio |
Therefore, the summit height produced by the Trimble GeoXH 6000 survey is 297.5m and this is positioned at SJ 19988 69614, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 105 metres north-westward from where the previously listed summit is positioned.
The full details for the hill are:
Group: Moel y Gamelin
Name: Moel y Crio
OS 1:50,000 map: 116
Summit Height: 297.5m (converted to OSGM15)
Summit Grid Reference (New Position): SJ 19988 69614
Bwlch Height: 276.8m (converted to OSGM15)
Bwlch Grid Reference: SJ 20406 69385
Drop: 20.7m
Myrddyn Phillips (September 2022)
No comments:
Post a Comment