A New Blog for Welsh Upland Place-Names

 

Aled Williams has recently established a new blog called Bugail yr Enwau, which focuses on gathering upland place-names through local surveys and historical research.

https://bugailenwau.blogspot.com/

As many in the Mapping Mountains community know, Aled specialises in the upland place-names of Wales and co-authors a number of hill-lists with me, namely: The 400m Hills of Wales – Bryniau 400m Cymru, The Fours – The 400m Hills of England, and Y Pellennig – The Remotest Hills of Wales. I met up with Aled to find out more about his new blog.

Myrddyn: Hello Aled, could you tell us what your new blog is about?

Aled: For over fifteen years now, I have specialised in the cataloguing and study of place-names in the Welsh uplands. The scope of this work is extensive, covering all upland areas from Eryri in the north to Bannau Brycheiniog in the south. This blog is dedicated to this research, serving as a place to share news and information as my work develops and as it feeds into other projects and activities.

Myrddyn: Is your blog in Welsh or English?

Aled: It is bilingual. Obviously the subject matter is largely Welsh in nature, but there will be interest from monoglot English speakers, so all the articles will be available in both languages.

Myrddyn: I believe Bugail yr Enwau translates as ‘shepherd of the names’, why did you choose this name for the blog?

Aled: I wanted a Welsh name that summed up my research endeavours. Collecting upland place‑names is laborious work: like sheep, names must be gathered down from the mountain! So the name is a slightly tongue-in-cheek reference to my work in shepherding upland place-names.

Aled gathering names on Mynydd Hiraethog, June 2014 

Myrddyn: I see. So what prompted you to establish the blog?

Aled: External factors, really. Place-names have become a hot topic in Wales in recent years. There is growing concern that Welsh names are being replaced by newly invented English names or translated ones, whether house-names or topographical-names. For the latter, digital mapping and its relationship with social media is fuelling this perception, and may well be accelerating it. Various groups and organisations are actively running initiatives and projects to protect Welsh place-names, and because of my expertise in upland place-names, I am involved with the some of these activities. It’s important that people know about my work and are able to contact me for assistance. It also serves as a platform I can use for outreach.

Myrddyn: An online presence is essential these days. Do you see it as being helpful to your efforts in collecting place-names?

Aled: Absolutely. It opens up another avenue where local people can contact me directly if they have upland place‑names to safeguard or proposals for changes to official maps. A contact form has been set up for this purpose.

Myrddyn: Did I also hear that you are working with Eryri National Park to add and correct place-names on Ordnance Survey maps?

Aled: That’s right. In fact, we have already received Ordnance Survey’s acceptance relating to two names: Ysgar and Diffwys Criafol, both of which are topographical names for places located on the east side of Crib Goch; neither of which had been recorded by Ordnance Survey during the original nineteenth-century surveys that laid the foundations of their Welsh mapping. Those interested can read about it in the News section of the blog.

Myrddyn: Is obtaining Ordnance Survey acceptance on place-name changes straightforward?

Aled: No it isn’t. Cartographic changes are rightly scrutinised by Ordnance Survey, and their appropriateness must be demonstrated by compelling evidence. Without a vetting process, there is potential for all manner of erroneous or invented place-names to appear on maps. For the two names in question, the process took six months to complete and required input from Eryri National Park and the Welsh Language Commissioner. This was another reason for establishing the blog: to provide traceability and transparency on these changes, so the public know the who, what, when, and why.

Myrddyn: Will the evidence packs be posted each time an Ordnance Survey map change is accepted?

Aled: That is the intention. Posts will appear in the News section of the blog.

Myrddyn: I wish you luck with the new blog.

Aled: Thank you!

Mapping Mountains – Trimble Surveys – Hirddywel

 

08.05.26  Wenallt (SO 036 712)

The summit of Wenallt (SO 036 712)

Forested summits are not my favourites.  This isn’t surprising as many prove formidable to reach their highest point, entailing pathless slogs through enclosed conifers with skin ripping brambles and other unsavoury undergrowth encountered.  There are also some summits that resemble an assault course due to felled wind blown trees when upward progress seems impossible.  However, on occasion even these can give an unusual feeling of fulfillment if the summit is eventually reached.

Therefore, it wasn’t surprising that I had left Wenallt as my last Pedwar in this area of Wales, as although inviting tracks are shown on the Ordnance Survey 1:25,000 Explorer map, the hill looked a mass of uninviting conifer trees.

With a planned morning visit to the Powys archive at Llandod and knowing that this was my last Pedwar in the Hirddywel group of hills, Aled was enthusiastic for us to visit the hill in the afternoon.  The forecast wasn’t promising with heavy localised showers breaking out after midday, and as we left the archive at its 12.30pm closing time the clouds were massing with the prospect of those showers soon materialising.

It’s only a short drive from Llandod to Abaty Cwm-hir and we were soon parked just off the narrow road at the start of a forest rack.  A metal gate barred further vehicle access, and upon inspection we found this locked, so driving on the forest track to gain height was now out of the question.  Therefore, once walking boots were donned we set off up the wide expanse of gravelled track that led first northward away from the summit before swinging westward back toward it. 

A convenient parking place for the ascent of Wenallt

The early afternoon was slightly muggy and as my younger companion seemed to manage the uphill with hardly a breath out of place, I started to sweat and needed a few rests to try and compose my heartbeat and steady its increased thudding. 

The narrower track leading to the turning place

It was a tranquil scene in the forest, with rising mature conifers spreading toward the sky and occasional birdsong wafting from their heights.  The main forest track soon bisected with the branch we wanted now narrowing and heading south.  This culminated in a grassed area where forestry vehicles could turn.  We now had two options for further progress; one grassed track leading up to two felled trees and a slightly lower path that was narrower and lost a little height.  We opted for the higher one and soon clambered over the trees.  On our descent we headed through the mature forest to join the lower narrower path, and therefore bi-passing the two obstacles. 

The greens and blues of summer

Approaching the grassed turning circle

Having clambered over the two trees we were soon on a delightful path that meandered through the wood, always claiming height on a thankfully steady gradient.  Such paths are seldom found in conifer forests.  The path forever weaved its way up through the wood, with dappled sunlight occasionally casting through the trees, adding a welcome highlight of colour to the scene. 

A direct approach toward the summit looked horrendous

The green track beyond the turning circle with the two fallen trees ahead

Thankfully the forecast showers never materialised in this part of the country, with only a few spots of rain appearing as our route through the trees reached the upper broad easterly ridge of the hill.  Here we swung rightward with the path continuing its delightful meander through the trees. 

On the path that meandered through the wood

Close to the summit another large fallen tree meant a slight diversion was needed, but such occurrences were rare and the ones encountered never difficult to overcome.  Aled reached the summit before me; this comprises a small outcrop with vegetation overflowing from its upper reaches.  The outcrop is easy to get up with only thin branches from enclosing trees as hindrance. 

On the broad easterly ridge leading toward the summit

I followed and with Aled vacating the small area of the high point I soon stood on the summit.  Making our way back down we examined the outcrop and pondered what a lovely ridge walk this would have been prior to the influx of conifers, and what a shame it was that those planting the forestry had no foresight to leave the summit area free of trees. 

Aled on the summit of Wenallt

The outcrop that constitutes the summit of Wenallt

Our route proved ideal, with the upper part of an approach from the west looking horrendous as a jumble of trees barred any passage through.  All that remained was to retrace our steps down the broad easterly ridge before swinging north on our delightful inward path, with Aled leading the way through the mature trees to gain the lower path close to the turning place so we could avoid the two fallen trees clambered over on our ascent.  We were back at the car by 3.15pm, with the walk having taken 1hr 50min.

Another Pedwar visited taking my total to 364 hills, with 448 hills in all it would be tempting to concentrate on the remainder, but my baggng mentality has changed over recent years and I gain almost as much pleasure from repeat ascents as I do from visiting new hills, so for me I doubt I’ll finish this list. 

   

Survey Result:

 

Wenallt

Summit Height:  471.9m (LIDAR) 

Summit Grid Reference:  SO 03697 71231 (LIDAR) 

Bwlch Height:  372.7m (LIDAR)

Bwlch Grid Reference:  SO 03481 72058 (LIDAR)

Drop:  99.2m (LIDAR)

Dominance:  21.01% (LIDAR)

 

 

For further details please consult the Trimble Survey Spreadsheet

Mapping Mountains – Trimble Surveys – Arenig Fawr

13.12.25  Ffridd Trawsgoed (SH 837 328) and Moel Hafod yr Ŵyn (SH 841 322) 

Moel Hafod yr Ŵyn (SH 841 322)

There is bleak beauty in venturing on to rough, unremitting ground and especially so during the onset of winter where grey skies predominate and a brisk wind echoes across the land.

Today we visited two hills positioned just west of the southern most part of Llyn Tegid.  Both are relatively easy to access from the narrow road that winds its way across these hills toward Bronaber.  I hadn’t been on this road in many years and had not until today visited these two hills.

I met Mark and Aled in Y Bala, where we left two cars and then continued on the A494 road heading south-west beside the lake toward the minor road that in time would take us to our designated parking spot on a grass verge beside an old metal gate. 

Heading toward the forest track

The forecast gave south-westerly winds, so not chilled and relatively mild for the time of year.  I set off before Mark and Aled, but soon stopped and waited as the continuation of the way up the hill was indistinct with slender long grasses amongst bracken and stunted trees giving little indication of a path.  However, one did exist and once on it I followed my companions up to a forest track that shortly afterward bisected another track where a person was standing beside a gate.  As we approached we said hello; Andrew Graham was the landowner, his sister was standing a short distance further down the track.  We chatted for five minutes or so, he was concerned as the gate had been left open and wondered who had done it.  He’d come to the area in the 1960s having bought the land to turn it over to the conifer plantation that now surrounded us. 

Andrew Graham

As Andrew walked down the track to join his sister, we headed in the opposite direction looking for a convenient access point on to the upper hill, which now rose in front of us a mass of heather and roughness.  The going uphill from this point was steep and ponderous with no semblance of path.  It was hard work, but also a marvelous place to find oneself on a Saturday afternoon in December. 

The steep heathery slopes leading to the summit of Ffridd Trawsgoed

I arrived on top last out of the three and was immediately buffeted by the brisk wind.  Although I’d brought the Trimble I had little intention of using it unless the tops were covered in clag and then only as a hand-held GPS device.  However, I still placed it on the high point for the customary photograph. 

The summit of Ffridd Trawsgoed

To our south Moel Hafod yr Ŵyn looked a wild inviting hill, with a rather unpleasant bog between us and it.  Leaving the summit we stumbled our way down the steep pathless slope and back on to the relative comfort of the forest track.  However, the comfort didn’t last long as soon the bog would have to be tackled. 

Moel Hafod yr Ŵyn and its unsavoury looking bog

There’s a pleasing aspect to bogs.  Many are lush with copious amounts of undergrowth and this one was definitely one to savour.  Progress through it was never difficult and wearing vibram soled wellies certainly helped.  I followed Aled as he furrowed his way through, only stopping occasionally to regather my breath during which I looked at the slender threads of long grasses as they gently danced in the wind.  As I said; there is beauty in a bog. 

Mark tackling the bog

Mark soon joined us on the other side of the bog and as Aled headed up to gain height, Mark continued flanking the upper hill on the periphery of the bog before then heading up toward the summit cone.  Oh decisions decisions, what one to follow?  I opted for Aled and was soon being left behind as I made slow progress through the undergrowth.  By the time I spotted Mark he had gained height and was approaching the upper part of the hill, Aled was already nearing the summit.  I continued my slow plod up in to the realms of wind and views.

Aled heading toward the summit of Moel Hafod yr Ŵyn

The upper cone of Moel Hafod yr Ŵyn

The upper hill proved a delight with a small rock band to veer past.  Having reached the summit I did as I had done on top of Ffridd Trawsgoed and placed the Trimble on the high point for its customary photograph.  The view compensated for my tiredness, with the land to the west a wild and remote place of more tussocks, bog and rising hills, whilst to our south-east the descending slopes headed down to the gentler climes of the valley below. 

The summit of Moel Hafod yr Ŵyn

Leaving the high point I followed Aled down through mixed ground of heather and intermittent hidden rock.  Our route down led to a wall which had a barb wired fence perched menacingly on top of it.  This was not good news for the two elderly gentlemen in our walking party.  However, with the help of our younger colleague there was no mishap and soon we were standing on relatively safe ground on the other side. 

The last steep slope leading back on to the narrow road and the car parked beyond

From here it was only a short walk back to the car; with an initial steep slope leading on to the narrow road where we veered right and followed the thin width of tarmac a few hundred metres back to where we had started our walk from.

We were back in Y Bala at around 4.40pm and soon happily seated in the Plan yn Dre for an early evening festive meal, which proved an excellent way to end another good day on the hill. 

 

Survey Result: 

 

Ffridd Trawsgoed 

Summit Height:  423.9m (LIDAR)  

Summit Grid Reference:  SH 83755 32841 (LIDAR)

Bwlch Height:  384.2m (LIDAR)

Bwlch Grid Reference:  SH 83731 33086 (LIDAR) 

Drop:  39.7m (LIDAR)

Dominance:  9.36% (LIDAR)

 

 

Moel Hafod yr Ŵyn 

Summit Height:  398.2m (LIDAR) (significant height revision)  

Summit Grid Reference:  SH 84199 32238 (LIDAR)

Bwlch Height:  358.4m (LIDAR)

Bwlch Grid Reference:  SH 84033 32465 (LIDAR) 

Drop:  39.8m (LIDAR)

Dominance:  9.99% (LIDAR)

 

 

For further details please consult the Trimble Survey Spreadsheet 

Mapping Mountains – Trimble Surveys – Carn yr Hyrddod

 

05.04.25  Lan Ddu Fawr (SN 787 699) and Carn yr Hyrddod (SN 790 704) 

Lan Ddu Fawr (SN 787 699) from the summit of Carn yr Hyrddod (SN 790 704)

Due to independent surveying and LIDAR analysis there are few important hill surveys that remain.  Lan Ddu Fawr and Carn yr Hyrddod are two of these hills.  They are placed in the open grasslands of the Elenydd, approximately 0.5km apart.  Both are topped by the remains of ancient cairns, with scattered rock at their summits.

Considering the wild surrounds of each hill, they are relatively easy to access, with the minor road leading toward the Llynnau Teifi to their south.  The paved section of this road turns to track and continues to Claerwen; one of the remotest farms in Wales.  The track continues from this farm around the northern section of the Claerwen Reservoir, before turning back to a paved road and its continuation east toward Rhayader Gwy. 

The Llynnau Teifi

Lan Ddu Fawr is given a 593m spot height on contemporary Ordnance Survey maps with a triangulation pillar perched in the remains of the ancient cairn which is now fashioned as a wind shelter.  With the flush bracket adjoined to the trig pillar recorded as 592.836m in height.  Whilst, Carn yr Hyrddod is given a 594m summit spot height, which is coloured beige on contemporary Ordnance Survey maps, this indicates an air height, the accuracy of which is not as good compared to that of the flush bracket height.

As current maps give Carn yr Hyrddod 1m higher, it is this hill that is prioritised for listing purposes.  Its classification can be viewed as important as it is listed as a Marilyn, Dewey, Dodd, a Welsh Highland P15 and a 500m Twmpau.  Confusingly the hill originally appeared in the Marilyn and Dewey listings as Waun Claerddu, which applies to land incorporating a large bog to the south-east of the summit of Lan Ddu Fawr.  To add confusion upon confusion the Marilyn list has recently changed its listed name to Lan Ddu Fawr, which applies to the lower map heighted hill and not the higher. 

Extract from the Ordnance Survey 1:25,000 Explorer map

These hills had been on our surveying radar for over a year as the higher map heighted hill is one of our named hills for our Groups within our Regions and Sub Regions.  Whilst, the lower hill is also close to Welsh Highland P15 status with LIDAR giving it 14.6m of drop.  Therefore, our plan was to survey each summit, gathering at least two - three data sets from different positions and also to survey the connecting bwlch between the hills.  The weather forecast for the day’s adventure gave clear blue skies, albeit with a brisk chilling easterly wind.

I met Aled at Dinas Mawddwy at 7.30am and proceeded to drive toward Aberystwyth and then the roads heading south before connecting with the narrow road leading to Llynnau Teifi.  We parked close to a cattle grid and fence that headed up toward our hills.  As I opened the car door, the wind hit me and I quickly changed from shorts to walking trousers.  Thankfully Aled had brought spare gloves which I needed as I had dispensed with my winter gear in favour of a thin pair that would only protect from a slight chill, and that easterly wind definitely needed extra protection as it was chilling to the bone.

From where we parked there are two options for a relatively easy route toward the first of our hills; Lan Ddu Fawr.  One is a wide shaly track rising steeply above the road; the other is a comfortably gradiented green vehicle track that headed up beyond the cattle grid and would in time follow the course of a fence.  I was in following Aled mode and he soon headed up the steep shaly section.  Beyond was open hillside and miles of it in every direction.  This is one of the appeals of the Elenydd and few places in Wales can compare. 

Heading to the hill

Our route soon joined the remains of a leet that contoured around grassed hummocks to our west.  Aled soon left me to bag a P10 sub.  He had a number of these on his planned route, which would leave me on the summit of Carn yr Hyrddod and take a circuitous route across the grass and bog toward Bryn Dafydd, before heading back to Trawsallt and continuing to Disgwylfa and eventually more sub hills before reaching the relative comfort of the paved road below.  This would leave me to survey the summits of Carn yr Hyrddod and Lan Ddu Fawr, via the connecting bwlch, surveying all necessary points on the way, before heading back on our inward route to meet Aled back at the car. 

Lan Ddu Fawr above Waun Claerddu

Aled soon bagged the P10 sub and rejoined me as the leet headed toward a forlorn looking gate.  Here we rested whilst I set the Trimble up on a gate post to attune it with satellite configuration.  From here we contoured around the upper part of Waun Claerddu before heading up the steep southerly slopes of Lan Ddu Fawr, which took us to its summit.  By now we were exposed to the wind and it whisked across the hill, so much so that unless hunkered down behind the wind shelter it proved difficult to communicate.  We spent ten minutes or so assessing the summit area and judging what points needed to be surveyed.  Having picked three candidates we headed off following a sheep track on the moor down toward the connecting bwlch. 

Leaving the summit of Lan Ddu Fawr and heading toward Carn yr Hyrddod

If not for the ten figure grid reference produced by LIDAR it would be difficult to pinpoint where the critical point of this bwlch lay, as it consists of much bog, which today was thankfully almost bone dry.  Writing this post on the 6^th April follows the driest month of March ever recorded in Wales and England, and the first few days of April have been the same.  This helped us during the walk as few places were boggy and that included the bwlch we were now walking through.  Remembering the LIDAR lay-out of this bwlch, Aled pointed toward its critical point as we headed through its stunningly wild surrounds toward the steepening slopes of Carn yr Hyrddod. 

The bwlch between the two hills

As we crested the upper ridge the wind hit us again.  At least the confines of the bwlch had given some respite from its chilled extremes.  This summit consists of a relatively modern cairn and beside it the jumbled remains of the ancient cairn.  We again assessed the lay of land and pinpointed three positions to survey.  At each summit we looked for large rocks that could be deemed as being part of the natural hill.  There is plenty of rock at each summit, but none that could be described as large enough to be a part of the natural hill and therefore surveys were taken to either grass or the ground at the base of the rock. 

Aled at the summit of Carn yr Hyrddod

As we made our way to the summit a figure appeared beside the wind shelter on Lan Ddu Fawr, by the time our summit assessment was complete he had joined us.  Kevin Nicholls had driven up from Cardiff and was part of the SOTA – Summits on the air community, and planned on setting up his gear back on the summit of Lan Ddu Fawr.  He then headed back toward this summit, and soon afterward Aled was off on his wild hill bagging trek.   I watched as he headed down toward a near bog before claiming height on a ridge leading toward the summit of Bryn Dafydd. 

Aled heads off in to the wilds of the Elenydd 

This left me to my surveying activities.  I knew what needed to be done and even though the wind was proving fierce I had faced similar conditions on a few hills before.  However, with six planned surveys on the two summits I knew that the wind would hinder me more so than the Trimble, as even writing the notes in my surveying notebook proved cumbersome and especially so when the wind was blowing my camera strap and Trimble bag back over my head! 

I soon found a suitable rock to place above the first point to survey and positioned the Trimble on top of it, wedging it in place with two smaller rocks.  This proved an ideal solution to the wind and would be employed on the remaining summit surveys.  Having taken a measurement offset from the equipment’s internal antenna to the ground at its base, I waited patiently for the 0.1m accuracy level to be attained before data should be logged, and once achieved I activated it to gather data. 

Gathering data at the summit of Carn yr Hyrddod

During data collection I stood a safe distance away from the equipment so as not to hinder satellite reception, scribbled all necessary detail in my survey notebook, whose pages were flapping about in the wind.  Once five minutes of data were collected and stored I turned the equipment off, took a series of photographs and repeated the process at two further points.  Progress was being made.

Leaving the summit of Carn yr Hyrddod I headed back down to the sheltered confines of the connecting bwlch.  Using the Trimble as a hand-held device I zeroed in to the ten figure grid reference produced by LIDAR analysis.  The DTM and DSM model give the critical bwlch approximately 5 metres apart.  I favoured using the DTM model as the critical point, and this led me to a small channel amongst copious amounts of rather beautifully coloured grass tussocks. 

Gathering data at the connecting bwlch between the two hills

Wanting a rest from the buffeting wind I decided to take two data sets, both from the same position, with the Trimble placed on top of my rucksack, with its base firmly wedged in the bottom of the channel.  After the first data set was complete I re-positioned the rucksack over the same point but with the Trimble now facing a different direction and set it to gather another five minute data set, during which I sat and looked at some extraordinary purple coloured bog enjoying lichen encrusted bulbous beauty that covered the edge of a near peat hag.  This and looking up toward the summit of Carn yr Hyrddod occupied the next few minutes.  Sometimes surveying can take you to some out of the way places, that in their own right are extraordinarily peaceful and have a tranquility all their own, and this connecting bwlch was one of those places.

Once the second bwlch survey was complete I packed the equipment away and headed around any bog and joined the ridge leading to the summit of Lan Ddu Fawr.  Nearing the top I looked east toward the ridge connecting with Trawsallt and spotted a small figure heading toward its summit.  It was Aled.  He had made good progress and I thought that he’d probably get back to the car before me as I still had three data sets to gather atop Lan Ddu Fawr. 

Aled on his way to Trawsallt

When I arrived back at the wind shelter Kevin Nicholls was hunkered down with his aerials already set up and transmitting, talking to friends in various parts of the country.  I said hi and explained that I wanted to take a series of data sets and would be doing so on the far side of the wind shelter for around 25 minutes.  He indicated that he would remain where he was whilst I did my stuff. 

Kevin Nicholls hunkered own with his SOTA equipment in place

I soon had the first position set up, again using a rock to place the Trimble on and two others to wedge it in place.  Once the measurement offset was taken I retreated as it collected another data set.  Once complete I headed back around the cairn to tell Kevin that the first was now complete and two more were to be taken.

This routine of using a rock to slightly elevate the Trimble and give it a solid platform and to protect it from any wind disturbance with two wedged rocks, proved ideal and soon the second data set was complete.  Before moving the Trimble to the last position I again headed off to tell Kevin that only one remained to take. 

Carn yr Hyrddod from Lan Ddu Fawr

The third position was going to be the most difficult to get a good data set from as Aled and I had decided that one needed to be taken at the entrance to the wind shelter.  This meant that even with its slight elevation on its rock the Trimble was faced with higher rock immediately above on three sides.  This is not conducive to either attaining the 0.1m accuracy level before data should be logged, let alone attaining a good data set, we will have to wait and see what the processed data gives. 

Gathering data at the summit of Lan Ddu Fawr

As the last data set was nearing completion Kevin was packing up his gear and therefore a quick bit of wind driven conversation later and we decided to head down the hill together.  All that remained was to take a few photos of the last of the eight survey positions taken during the day, pack the equipment away, get my rucksack on and join Kevin as we headed down the hill.

Our route took us back to the gate where on the ascent I had taken a data set to attune the Trimble to the local satellite reception.  From here we opted to follow Kevin’s inward route, walking on a good quad bike track beside the fence line.  We took our time on our outward walk with lots of good conversation. 

Kevin Nicholls

By the time we arrived back at the two awaiting cars, Aled was already there, flat on his back resting in the sun.  He’d made good time on his route around the hills.  Before leaving we chatted with Kevin for quite sometime about the various hills he’d transmitted from and those he hoped to visit.  It had been an excellent day on the hill, with all plans fulfilled.  It should be an interesting survey result! 

 

Postscript: 

The processed Trimble result could not split the heghts of these hills and therefore they are now listed as a twin top in the Deweys and 500m Twmpau lists.  However, for convenience the data given below uses Carn yr Hyrddod as the prioritised hill.  Please click here for more information relating to the Dewey twin top announcement. 

 

Survey Result: 

 

Lan Ddu Fawr (significant name change for the Deweys)

Summit Height:  592.7m (converted to OSGM15) (summit relocation based on twin top for the Deweys) (summit relocation based on twin top for the 500m Twmpau)

Summit Grid Reference:  SN 78759 69974

Bwlch Height:  578.1m (converted to OSGM15, average of two surveys)

Bwlch Grid Reference:  SN 78931 70288

Drop:  14.6m

Dominance:  2.47%

 

 

Carn yr Hyrddod (significant name change for the Deweys)

Summit Height:  592.7m (converted to OSGM15, Trimble GeoXH 6000) (summit relocation based on twin top for the Deweys) (summit relocation based on twin top for the 500m Twmpau)

Summit Grid Reference:  SN 79069 70421 (Trimble GeoXH 6000)

Bwlch Height:  424.8m (LIDAR)

Bwlch Grid Reference:  SN 79547 66955 (LIDAR)

Drop:  168.0m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Dominance:  28.34% (Trimble GeoXH 6000 summit and LIDAR bwlch)

 

 

For further details please consult the Trimble Survey Spreadsheet