Pen yr Allt (SH 429 917)
There has been a Significant Name Change to a hill
that is listed in The Welsh P15s, with
the summit height, bwlch height and their locations, the drop and status of the
hill derived from LIDAR analysis conducted by Myrddyn Phillips.
|
LIDAR image of Pen yr Allt (SO 429 917) |
The criteria for the list that this name change applies to
are:
The Welsh
P15s – Welsh hills with 15m
minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s,
with the criteria for this sub category being all Welsh hills with 14m or more
and below 15m of drop. The list is authored by Myrddyn Phillips, with the
Introduction to the list appearing on Mapping Mountains on the 10th
May 2019.
|
The Welsh P15s by Myrddyn Phillips |
The hill is adjoined to the
Ynys Môn group of
hills, which are situated in the
north-western part of North Wales (Region A, Sub-Region A1), and it is
positioned with the coast to its north, and is encircled by minor roads with
the A5025 road farther to its north and the B5111 road farther to its east, and
has the town of Amlwch towards the north-east.
When the listing that became known as The Welsh P15s was being compiled, this
hill was listed under the point (Pt. 69m) notation with 15m of drop, based on
the 69m summit spot height that appeared on the Ordnance Survey Vector Map
Local hosted on the Geograph website and which was entitled the Interactive
Coverage Map and the 54m bwlch spot height that appears on the Ordnance Survey
1:25,000 Explorer map.
|
Extract from the Ordnance Survey 1:25,000 Explorer map |
As the summit of this hill comprises bounded land
the details for it were examined on the Tithe map. The
term Tithe map is generally given to a map of a Welsh or English parish or
township and which was prepared after the 1836 Tithe Commutation Act. This act allowed tithes to be paid in cash
rather than goods. The Tithe maps gave
names of owners and occupiers of land in each parish and importantly for
place-name research they also included the name of enclosed land. This enclosed land is usually based on a
field system, however not every field is given a name, but many are and
especially so in Wales.
|
Extract from the Tithe map |
The enclosed land where the summit of this hill is
situated is given the number 191 on the Tithe map, this can be cross referenced
against the apportionments; it is these apportionments that give the name of
the owner or occupier of the land as well as the name of the land. The land where the summit of this hill is
situated is named as Pen yr Allt in the apportionments, with the details on the Tithe map appearing in the parish of Amlwch and in the
county named as Anglesey.
|
Extract from the apportionments |
Therefore, the name this hill is now listed by in The Welsh P15s is Pen yr Allt and this
derived from the Tithe map.
The full details for the hill are:
Group: Ynys
Môn
Name: Pen yr Allt
Previously Listed Name: Pt. 69m
OS 1:50,000 map: 114
Summit Height: 69.4m (LIDAR)
Summit Grid
Reference: SH 42925 91717 (LIDAR)
Bwlch Height: 55.1m (LIDAR)
Bwlch Grid
Reference: SH 43244 91030 (LIDAR)
Drop: 14.3m (LIDAR)
Myrddyn Phillips
(September 2021)
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