Cefn Dreiniog (SJ 145 147) – proposed Subhump deletion
This is the thirty ninth in a series of Hill Reclassification
posts that detail hills whose status has either been altered in the listing of
the Humps (HUndred Metre Prominences) through map study, surveys or LIDAR analysis that I
have been involved in, or it is the recommendation that their status is
altered.
Cefn Dreiniog (SJ 145 147) |
The listing of Humps was published in book format by Lulu in
2009 and entitled More Relative Hills of
Britain, its author; Mark Jackson gives credit to a number of people who
contributed toward the formation of this list, these include; Eric Yeaman, Alan
Dawson, Clem Clements, Rob Woodall, Bernie Hughes, Pete Ridges and others. When the list was published in book format
there were 2987 Humps listed with their criteria being any British hill that
has 100m or more of drop, irrespective of their height. Accompanying the main list is a sub category
entitled Subhumps, with the criteria being any British hill that has 90m or
more and below 100m of drop.
More Relative Hills of Britain by Mark Jackson |
There has been a proposed deletion to the listing of the Humps (HUndred
Metre Prominences) instigated by a combination of detail on maps produced
from Ordnance Survey data and a Trimble GeoXH 6000 survey conducted by Myrddyn
Phillips.
The name the hill is listed by is Cefn Dreiniog and it is
adjoined to the Y Berwyn group of hills, and it is encircled by minor roads
with the A495 road farther to its south-east, and has the village of Meifod towards
the south south-east.
Extract from the Ordnance Survey 1:25,000 Explorer map |
The Trimble GeoXH 6000 gathering data at the summit of Cefn Dreiniog |
The full details for the hill are:
Name: Cefn Dreiniog
OS 1:50,000 map: 125
OS 1:25,000 map: 239
Summit Height: 318m
(as listed in the Humps, with the Trimble GeoXH 6000 survey giving 317.1)
Summit Grid Reference:
SJ 14508 14704 (as listed in the Humps, with the Trimble GeoXH 6000
survey giving SJ 14506 14701)
Bwlch Height: 228m
Bwlch Grid Reference:
SJ 140 148
Drop: 90m (as listed
in the Humps with the Trimble GeoXH 6000 summit survey and bwlch spot height giving
89m)
Myrddyn Phillips (July 2021)
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