Hill Reclassifications – 200m Twmpau

This part of the Mapping Mountains blog is dedicated to any hill reclassification for the listings I have compiled.  These include ones found from map detail as well as those from accurate surveying.

There have been a number of recent new entries to the Welsh 200m P30 list, including some that do not appear on other P30 listings.  The following are those for Bryniau Clwyd:

Bryniau Clwyd             Billins    294m    SJ 195 719

This hill is part of Halkyn Mountain and is a promotion from the sub-list as the hill has a summit triangulation pillar with a flush bracket height of 294.281m (293.981m to base of trig approximately) and a bwlch estimated as c 263m with contours between c 260m – c 265, giving the hill c 31m of drop.  There are two options for the position of the bwlch, both are estimated as c 263m high, they are situated at SJ 203 708 and SJ 208 700.

Bryniau Clwyd             Pen y Ball    258m    SJ 173 756

This hill was not included in the original 200m P30 list.  The bwlch contouring is between c 225m – c 230m with the height estimated as c 227m, giving a drop of c 31m.  However, the summit consists of a mound that overlooks Holywell and has a monument on it that commemorates the marriage, coronation and silver jubilee of George V.  I do not know if the mound is man-made.  If it is it would exclude this hill from the P30 list as the drop would then be insufficient to qualify.

Bryniau Clwyd             Coed Pen-y-gelli    233m    SJ 135 762

A promotion from the sub-list and a summit that is twinned with Coed Moel-dda at SJ 143 754, both summits are given a 233m black spot height on the Ordnance Survey 1:25,000 map.  The bwlch contouring for Coed Pen-y-gelli is between c 200m – c 205m and has been estimated as c 203m, giving a drop of c 30m.  The bwlch separating the twin summits has been estimated as c 218m, giving the non-prioritised summit of Coed Moel-dda a drop of c 15m.

Bryniau Clwyd             Pt. 213m    213m    SJ 304 530

This is a summit relocation from the 211m hill previously listed by the invented name of Moss Hill at SJ 301537.  The new summit has a 213m spot height on the Ordnance Surveyed enlarged Geograph map.  The point notation has been used for its name as no appropriate name is known for the hill.

There have also been a number of ‘new’ subs that have entered the Welsh 200m P30 listing for Bryniau Clwyd, these are:

Bryniau Clwyd            Moel Ffagnallt    289m    SJ 189 700

A hill that has recently been surveyed with the Trimble GeoXH 6000, the Ordnance Survey map has a summit spot height of 287m and the bwlch contouring is between c 260m – c 265m.

To see the results of a Trimble survey of this hill click {here}

Bryniau Clwyd            Pt. 257m    257m    SJ 096 720

This hill has a summit spot height of 257m on the Ordnance Survey enlarged Geograph map and bwlch contouring between c 230m – c 235m, with an estimated height of c 233m, giving a drop of c 24m.  There is also an adjacent ‘Mound’ that has an uppermost ring contour of c 255m at SJ 096 719.

Bryniau Clwyd            Pt. 208m    208m    SJ 159 728

With a summit spot height of 208m and an estimated bwlch height of c 184m this hill qualifies for the Sub list with c 24m of drop.

Bryniau Clwyd            Craig y Rhos    299m    SJ 149 435

The bwlch is placed at SJ 149 437 and has a 276m spot height on the Ordnance Survey enlarged Geograph map, giving this hill 23m of drop.

Bryniau Clwyd            Pt. c 285m    c 285    SJ 206 703

With an estimated summit height of c 285m and an estimated bwlch height of c 263m, with bwlch contouring between c 260m – c 265m, this hill has an estimated c 22m of drop.

Bryniau Clwyd            Pt. 214m    214m    SJ 152 737

The name of Bryn Glas appears close to the summit of this hill on Ordnance Survey maps but it is probably the name of the farm to the south-east of this hill’s summit, therefore the point notation has been used for the name of the hill.  The hill has a summit triangulation pillar with a flush bracket height of 214.344m in the OS Trig Database.  The bwlch contouring is between c 190m – c 195m, with an estimated height of c 192m, giving a drop of c 22m.

Bryniau Clwyd            Pt. 295m    295m    SJ 088 469

With a summit height of 295m and an estimated bwlch height of c 274m at SJ 091 472, this hill is a new addition to the Sub list with an estimated c 21m of drop.

Bryniau Clwyd            Bryn Digrif    217m    SJ 126 792

This hill has a summit spot height of 217m and a bwlch spot height of 196m at SJ 129 788, giving the hill 21m of drop.

Bryniau Clwyd            Pt. 267m    267m    SJ 090 463

The bwlch contouring for this hill is centred on SJ 092 466 and is between c 240m – c 250m, with an estimated height of c 247m, giving a drop of c 20m.

Bryniau Clwyd            Glol    232m    SJ 120 781

The Ordnance Survey enlarged Geograph map has a 212m spot height at SJ 172 782 which is at a road junction.  Although not centred on the valley to valey traverse the estimated bwlch height would be c 212m at SJ 128 781.  Therefore the hill enters the Sub list with a drop of c 20m.

The hills listed above are updates to the Welsh 200m P30 list originally published on Geoff Crowder's website.  To see the original list click {here}