The first list to the Welsh
200m P30 hills was published on Geoff Crowder’s website v-g.me in 2000; this
list preceded the list of TuMPs by nine years, the list proved a very useful
resource for the TuMP compilation for this category of hill.
The Welsh 200m P30 list
documents all hills in Wales that are at or above 200m in height and are below
300m in height, to qualify for the main list each hill requires a minimum of
30m of prominence.
The hills listed below are
updates to the Welsh 200m P30 list originally published on Geoff Crowder's
website. To see the original list click {here}
The original published list had
a Sub-List which was entitled ‘Hills to Survey’. This list consisted of all hills in Wales in
the stipulated height band that have a minimum of 20m of prominence, but do not
meet the minimum 30m of prominence to enter the main list, according to
Ordnance Survey map spot heights and contours.
Nowadays the standard Sub-List takes in all hills that have a minimum of
20m of prominence. However, the Hills to
Survey Sub-List discounted hills whose map spot heights gave a drop value of
less than 30m, but more than 20m. By
doing so, the only hills that were Sub-Listed were those that map values
dictated stood a chance of entering the main list, for example; if a hill had a
summit spot height of 250m and a bwlch spot height of 221m, it was not listed
in the Hills to Survey Sub-List as with 29m of drop I thought it did not stand
a chance of main list qualification.
When compiling the Sub-List I
was measuring many hills for P30 status using a basic levelling technique,
please click {here} for more information concerning this. I now know that Ordnance Survey spot heights
have a standard margin of uncertainty of + / - 3m associated with their
accuracy. Therefore many hills that were
not listed in the original Sub-List may have sufficient drop to enter the main
list. Because of this the Sub-List has
been altered to include all hills that have a minimum of 20m of drop but are
not known to attain the minimum 30m of drop to enter the main list.
The hills listed below are
those major amendments to the original Welsh 200m P30 list as it appears on
Geoff’s website. There are many hills
that have been promoted from the Hills to Survey Sub-List to the main list,
whilst there are many additions to the Sub-List now that it has been
standardised to include all 20m minimum but below 30m drop hills.
When the 200m P30 list was
first published it was the first to this category of hills and in some way it
and its other 100m height band lists paved the way for Clem’s data that later
appeared on the RHB file database and then for the TuMPs listing by Mark
Jackson.
As well as the first P30 list
to this height band the list is now the first to include a comprehensive
Sub-List.
TuMP baggers beware; as the
main list also includes P30’s not listed by Mark Jackson, so if you want to
visit all P30’s you’ll have to include some non TuMPs to do so.
The list will be updated on a
weekly basis and will be done so through each Group category, starting from the
north and working south. The eleventh Group
is Carnedd Wen.
Carnedd
Wen
North and west of the Afon
Hafren (River Severn) and the border with England at SJ 328 158 to SO 027 916,
continuing north of the Afon Carno to bwlch at SN 930 998, and north of the
Afon Laen to SH 896 025, continuing east of the Afon Rhiwsaeson and the Nant Carfan
to bwlch at SH 891 083, and continuing east of the Afon Tafalog to SH 890 121,
continuing south of the Afon Dugoed to Bwlch y Fedwen at SH 934 138 and the
Afon Banwy to SJ 143 114, continuing south of the Afon Efyrnwy (River Vyrnwy)
to the border with England at SJ 268 205.
Bordering with Y Berwyn to the north, Mynydd y Cemaes to the west,
Pumlumon, Pegwn Mawr and Beacon Hill to the south and Cefn Digoll, Breiddin and
the English border to the east.
Twmpau - 200m updates
Bwlch Clump 262m
SJ 170 108
This is a new twin top with an already existing
Welsh 200 P30 hill. The name of Bwlch
Clump is taken from the Ordnance Survey enlarged Geograph map, as indeed is the
262m summit height. The existing P30
that this is twinned with is Pt. 262m (originally listed by the part invented
name of Pen y Bryn Wood) which is positioned at SJ 173 109.
Stingwern Wood c 258m
SJ 145 000
This is a summit relocation from Pt. 251m
(originally listed by the part invented name of Pen Cefnblewog) which is
positioned at SO 154 996. The original
listing prioritised the 251m spot height position on the OS 1:25,000 Explorer
map in preference to a c 250m contour ring, even if the contour ring at SJ 145
000 was large in comparison to where the spot height contour ring appears at SO
154 996. The new summit position has an
uppermost c 255m contour ring on the OS enlarged Geograph map, to complicate
matters there is another separate c 255m contour ring at SO 147 994 at Upper
House Wood, the former is prioritised as the c 255m contour ring is
larger. No absolute height has been
found on any Ordnance Survey map for the new summit location.
Boncyn y Beddau 253m
SO 107 981
This is a promotion from the Sub-List and a new p30
that doesn’t appear in Mark Jackson’s list of the TuMPs. The hill was originally listed as Bryn y
Brain, a part invented name from the wood to the south of the summit. The critical area for this hill’s inclusion
to the P30 ranks is its bwlch. The
contouring on most current Ordnance Survey maps is between c 220m – c
230m. However, the enlarged Geograph map
has 5m contour intervals and narrows the margin of interpolation down to c 220m
– c 225m. This latter map has the hill
to hill contours very close together and centred on a road near to a junction
with a track at SO 10782 98745, implying a c 224m bwlch, with c 29m of
drop. This is beside a house named as
Bryn View on old maps. The opposing
valley to valley contours are relatively far apart, with a 222m spot height
appearing at SO 10965 98831 on the enlarged Geograph map. This spot height is near to a pool that does
not appear on any other OS map, this pool is situated where an old clay pit is
positioned on old maps. The 5m interval
Geograph hill to hill contours seem to dismiss this 222m spot height as being
positioned too low for the critical bwlch.
But all other OS maps (including the Seventh Series, New Popular and
Historical 1:25,000) indicate the critical bwlch to be centred near to where
the 222m spot height appears on the current enlarged Geograph map. Driving around these lanes in a Google Car
also substantiates the position of the 222m spot height as a more favourable
critical bwlch position when compared to the road immediately beside the house
named as Bryn View on old maps. Google
Cars are not the be all and end all for critical bwlch positions, but they are
good fun! Hedges and tree growth in this
area are quite high but a view can be found that follows the valley to valley
traverse from beside Bryn View past another house toward the old clay pit. This view suggests that the ground is still
rising from the 5m contour interval centred position on the road at SO 10782
98745 to the position where the 222m spot height appears on the map. Therefore, the 222m spot height is being taken
as the position for the critical bwlch, giving this hill 31m of drop.
Pt. 249m 249m
SO 137 950
This is a promotion from the Sub-List. This hill was originally listed by the name
of Bryn-rorin, as this is the name of a farm to the north-east of the summit
the Pt. notation is being used. The old
241m height of the hill was taken from the Ordnance Survey 1:50,000 Landranger
map with the spot height appearing at SO 13866 95066. With the advent of the enlarged map on the
Geograph website many more spot heights are now available, including a 249m
spot height at SO 13701 95036 for this hill.
The bwlch is positioned in one of two spots; 213m at SO 139 957 or c
213m at SO 144 957, giving this hill a drop of 36m / c 36m.
Pt. 238m 238m
SO 111 962 / SO 103 962
This is another promotion from the Sub-List. This hill was originally listed as a twin
summit with c 230m tops, one listed as Bryncoch and the other listed as
Bryneithin. As each name applies to a
near farm the hill is now listed under the Pt. notation. Although the names have been dispensed with
the twin top status remains, as each summit is given a 238m spot height on the
Ordnance Survey enlarged Geograph map.
The bwlch contouring is between c 205m – c 210c and is estimated as c 208m
and centred at SO 102 964. The 207m spot
height near to this centralised position is considered too low and not at the
critical bwlch. The 238m summit and c
208m bwlch value give this hill c 30m of drop.
Sub-Twmpau - 200m updates
Pt. 289m 289m
SJ 080 032
A new hill for the Sub-List as it has a 289m summit
spot height and a 261m bwlch spot height at SJ 076 032, which is on a minor
road adjacent to the farm of Llawnt Isaf.
These values give this hill 28m of drop.
Pt. 299m 299m
SJ 173 073
Another new hill for the Sub-List and another hill
that follows the Pt. notation as no suitable name is known for the hill by the
blog author. The hill is positioned on
the Welshpool Golf Course, close to where I live. Its immediate parent hill is the Marilyn of Y
Golfa (SJ 182 070). With a summit spot
height of 299m and a bwlch spot height of 272m at SJ 174 071, this hill has 27m
of drop.
Pt. 269m 269m
SJ 061 016
A hill that is positioned just to the north of a
farm named Llwyncopa. It has a 243m
bwlch spot height at SJ 065 016 and a 269m spot height at the summit. The latter appearing on the Ordnance Survey
enlarged Geograph map. These values give
this hill 26m of drop.
Pt. 268m 268m
SH 996 069
As no appropriate name is known by the blog author
for this hill, it follows the Pt. notation (yet another one – there’s a lot of
research required to find appropriate names for these Welsh 200m Sub-P30
hills). The Ordnance Survey enlarged
Geograph map has a 268m spot height on the area of the summit, the bwlch
contouring is between c 240m – c 250m, with the height of the critical bwlch
being estimated as c 242m, giving this hill c 26m of drop.
Pt. 278m 278m
SJ 114 004
This hill that is neatly positioned between the farms
of Cefngwernfa to its south-west and Bryncaemaeshir to its east. The summit has a 278m spot height and as the
Ordnance Survey enlarged map on the Geograph website has contours at 5m
intervals, it narrows the bwlch height to between c 250m – c 255m, with the
height estimated as c 253m. These values
give the hill c 25m of drop.
Pt. 247m 247m
SJ 186 126
This hill has a 247m spot height on the Ordnance
Survey 1:50,000 and 1:25,000 map that is adjacent to a triangulation pillar
that has a 245m map height. The trig is
named Cae-Bardd (Caebardd is a farm north-eastward of the summit) and is given
a flush bracket height of 245.668m in the OS Trig Database. The base of the trig will be approximately
30cm lower than the flush bracket height – 245.37m. This height is still 1.6m lower than the 247m
spot height; therefore there should be ground significantly higher on this hill
when compared to the trig position. I’ve
looked on the excellent TrigpointUK.com website and there are 13 photos showing
the trig, many are quite close, but those that show ground away from the trig
do not show any that is higher. However,
one photo does show a bench, so for those visiting this hill you can relax and admire
the view whilst contemplating where the higher ground is. The bwlch contouring is between c 220m – c
230m and has been estimated as c 222m, giving this hill c 25m of drop to the
spot height of 247m.
Pen y Garreg 219m
SO 161 960
This hill (map composition of Pen-y-gareg) has a
219m summit spot height on the Ordnance Survey enlarged Geograph map and bwlch
contours between c 190m – c 195m, with an estimated bwlch height of c 194m,
giving this hill c 25m of drop.
Pt. c 256m c 256m
SO 092 962
Both the summit and bwlch height have been
estimated from contour interpolation, with the Ordnance Survey enlarged
Geograph map having 5m contour intervals.
The summit has an uppermost c 255m contour ring with the height
estimated as c 256m, whilst the bwlch contouring is between c 230m – c 235m
with an estimated bwlch height of c 232m, giving this hill c 24m of drop.
Pt. 217m 217m
SO 164 995
Another hill that benefits from the Ordnance Survey
enlarged Geograph map having contour intervals at 5m. The summit has a 217m spot height and the
bwlch contours are between c 190m – c 195m with an estimated bwlch height of c
193m at SO 159 996, giving this hill c 24m of drop.
Pt. 259m 259m
SJ 104 024
With a bwlch spot height of 236m at SJ 104 028 on
the Ordnance Survey enlarged Geograph map, this hill has a drop of 23m.
Pt. 289m 289m
SJ 106 031
The hill is listed under the Pt. notation, although
there is a farm named Maesprydd which is adjacent to the 289m spot height. The area of the bwlch has a 267m spot height
on the Ordnance Survey enlarged Geograph map, but it’s position is judged to be
too high on the hill to hill
traverse. Therefore the height of the
bwlch is estimated to be c 266m from contouring between c 265m – c 270m, giving
this hill c 23m of drop.
Pt. 247m, Moel y
Garth 247m SJ 203 097
The Ordnance Survey enlarged Geograph map has a
247m summit spot height for this hill and with an estimated bwlch height of c
224m (bwlch contouring between c 220m – c 225m) it gives this hill c 23m of
drop.
Pt. 247m 247m
SJ 069 007
Another hill’s estimated drop that benefits from
the Ordnance Survey enlarged Geograph map having contour intervals at 5m. The bwlch contouring is between c 220m – c
225c and has been estimated as c 224m at SJ 067 009, giving this hill c 23m of
drop.
Pt. 299m 299m
SJ 071 043
The 299m summit spot height appears next to what
may be a cow shed attached to a farm named Bryngwewir. This name may also apply to the hill, but
until further enquiry can be made the name follows the Pt. notation. The bwlch contouring is between c 275m – c
280m, with the bwlch height being estimated as c 277m, giving this hill c 22m
of drop.
Pt. c 296m c 296m
SJ 108 050
A hill whose summit and bwlch height have been
estimated from contour interpolation, but as the Ordnance Survey enlarged
Geograph map has contour intervals at 5m it makes the task a little
easier. The summit has an uppermost c
295m contour ring and has been estimated as c 296m, whilst the bwlch contouring
is between c 270m – c 275m and has been estimated as c 274m at SJ 109 049,
giving this hill c 22m of drop.
Pt. c 275m c 275m
SO 079 960
The Ordnance Survey enlarged Geograph map has a
small uppermost c 275m contour ring at the summit (estimated as c 275m high)
and a bwlch spot height of 253m at SO 079 958 which gives this hill c 22m of
drop.
Pt. 259m 259m
SO 087 963
The bwlch has a 238m spot height at SO 083 961 on
the Ordnance Survey enlarged Geograph map, this could easily be positioned at
the critical bwlch, but the valley to valley contours are closer to one another
and centred on a bwlch position at SO 085 961.
Therefore the height of the bwlch has been estimated as c 237m at SO 085
961, giving this hill a drop of c 22m.
Pt. c 206m c 206m
SJ 167 061
The summit has been estimated as c 206m from an
uppermost c 205m continuous ring contour and the height of the bwlch has been
estimated as c 184m, from bwlch contouring between c 180m – c 185m, giving this
hill c 22m of drop. This is another hill
that follows the Pt. notation as no appropriate name is known for it by the blog
author.
Pt. 268m 268m
SJ 166 120
The summit has a 268m spot height on it that
appears on the 1:25,000 and Geograph map, whilst the bwlch has a 247m spot
height that comes from the Ordnance Survey enlarged Geograph map, giving this
hill 21m of drop.
Pt. 279m 279m
SJ 013 079
There are two possibilities for the position of
this hill’s critical bwlch. The first is
at SJ 010 082, and the second is at SJ 011 084, both have contouring between c
255m – c 260m, and both have been estimated as c 258m. With a summit height of 279m, this gives the
hill c 21m of drop.
Pt. c 245m c 245m
SJ 084 023
Contour interpolation is helped by the Ordnance
Survey enlarged Geograph map having 5m contour intervals. The summit has a small c 245m uppermost
contour (estimated height of c 245m, it is quite small!) and the bwlch
contouring is between c 220m – c 225m, with an estimated height of c 224m at SJ
083 026. These values give this hill c
21m of drop.
Pt. 243m 243m
SO 159 963
Another hill that follows the Pt. notation as the
blog author does not know an appropriate name for the hill. Bwlch contouring is between c 220m – c 225m,
with an estimated height of c 222m, giving this hill c 21m of drop.
Pt. 238m 238m
SO 099 969
The Ordnance Survey enlarged Geograph map has a
238m summit spot height for this hill, it also gives a 236m height to a mound
south-eastward of the summit. The bwlch
contouring is between c 215m – c 220m and has been estimated as c 217m, giving
this hill a drop of c 21m.
Pt. 207m 207m SJ 041 097
The bwlch contouring for this hill is between c
185m – c 190m and has been estimated as c 186m, giving this hill c 21m of drop.
Pt. 229m 229m
SJ 193 097
The summit and bwlch are both spot heighted on the
Ordnance Survey enlarged Geograph map with 229m and 209m (SJ 184 096)
respectively, these values give this hill 20m of drop. The enlarged Geograph map also spot heights
another summit contender as 227m at SJ 191 095.
Pt. 214m 214m
SO 120 974
The area of the bwlch has a 194m spot height on it
on the Ordnance Survey enlarged Geograph map at SO 122 975. This value gives the hill 20m of drop.
Pt. 282m 282m
SH 997 098
This hill’s bwlch contouring is between c 260m – c
270m and has been estimated as c 262m, giving the hill c 20m of drop. This is another example where the Pt.
notation is used for the name of the hill as no appropriate name is known by
the blog author.
Pt. c 252m c 252m
SO 110 935
Although both summit and bwlch height have been
estimated from contour interpolation, the hill benefits from having contour
intervals at 5m on the Ordnance Survey enlarged Geograph map. These are c 250m for the summit (estimated as
c 252m) and c 230m – c 235m for the bwlch (estimated as c 232m). These values give this hill c 20m of drop.
Pt. 249m 249m
SJ 012 092
The summit has a 249m spot height on the Ordnance
Survey enlarged Geograph map, the bwlch contouring is between c 225m – c 230m
and is estimated as c 229m, giving this hill c 20m of drop.
Pt. c 216m c 216m
SO 120 987
The summit height has been estimated as c 216m from
an uppermost contour of c 215m, whilst the bwlch has a 196m spot height on it
on the Ordnance Survey enlarged Geograph map, giving this hill c 20m of drop.
Pt. 204m 204m
SJ 140 092
The summit height for this hill is unusual as the
Ordnance Survey enlarged Geograph map has contour intervals at 5m, and has an
uppermost contour of c 205m that has a 204m spot height in it, whilst the ground
between the c 200m – c 205m contours has a 205m spot height in it. I’ve opted for caution and decided to list
the hill with a summit height of 204m.
By doing so it means this hill has a twin 204m top at SJ 142 089. The bwlch contouring is between c 180m – c
185m and is estimated as c 184m. There
is a 182m spot height at SJ 142 096 on the area of the bwlch on the enlarged
Geograph map; this is considered too low and not positioned at the critical
bwlch. The hill is listed with c 20m of
drop.
Next update due on the 30th June 2014
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