Friday, 20 January 2017

Change Register – Y Pedwarau


Change Register

Y Pedwarau – The 400m Hills of Wales


Y Pedwarau are the Welsh hills at or above 400m and below 500m in height that have a minimum drop of 30m.  The list’s initial compilation was completed in November 2002 and entitled The 400m Peaks of Wales and was first published on 19th December 2002 on the RHB Yahoo Group file database along with the equivalent English and Manx hills, with the file entitled the 400m hills of England, Isle of Man and Wales, this file was uploaded by Rob Woodall who later augmented data from Clem Clements into the database.

When the listing of The 400m Peaks of Wales was published on the RHB Yahoo Group file database it was during a time when the limits of listing P30 hills was being pushed ever downward beyond the 500m barrier, there were two main instigators behind this burst of listing activity; Clem Clements concentrating on 300m – 500m Scottish, English and Welsh hills and Myrddyn Phillips concentrating on 30m – 500m Welsh hills and 400m – 500m English hills.

The listing was re-evaluated and later published on 22nd October 2004 on Geoff Crowder’s v-g.me website and entitled The Welsh 400 Metre Peaks, coinciding with Geoff’s publication the list was also published by Mike Grant on his 5everdene website.      

The master hand written list was maintained by Myrddyn Phillips with occasional updates appearing on the v-g.me website, with the original publication on the RHB Yahoo Group file database later being duplicated en masse by Mark Jackson without prior consultation with, or even notification to the author, with these data forming the equivalent part of the Tumps and with this act resulting in years of undue data divergence that is ongoing.

It wasn’t until the interest shown by Mark Trengove for this list to be published by Europeaklist that it was next fully re-evaluated, with the subsequent publication on 23rd May 2013 entitled Y Pedwarau and leading the way to the list becoming co-authored with Aled Williams.  The listing of Y Pedwarau was later published on 6th January 2014 by Phil Newby on his Haroldstreet website, and all future updates to the list have been catalogued on the Mapping Mountains site.

With all updates to the list appearing on Mapping Mountains it became evident that keeping the list up-to-date if hosted on another person’s website was difficult to say the least, therefore on 30th January 2017 the Y Pedwarau list commenced publication on Mapping Mountains with five sub lists accompanying the main P30 Pedwar list.   

Although the criteria has remained the same the list has changed greatly since its first publication with the advent of independent surveyors and the use of LIDAR data enabling greater accuracy for numerical data, and the meticulous research conducted by Aled Williams enhancing the place-name data.  The listing is also gaining in popularity as there are now four known completers of Y Pedwarau with another ten people having completed 100 or more Pedwar hills.

It seems fitting that the list of Y Pedwarau – The 400m Hills of Wales should now benefit from a detailed Change Register, and although the great bulk of updates to this list have been catalogued since its first inception in 2002, it is prudent for this Change Register to initially detail the changes to the list since the 2013 publication by Europeaklist.

The Change Register to Y Pedwarau – The 400m Hills of Wales appears below with the reclassifications to the main P30 list being detailed chronologically in receding order.



Change Register

Y Pedwarau – The 400m Hills of Wales








Fuches    446.7m at SN 86610 83643

This hill’s reclassification from Pedwar to 400m Sub-Pedwar was announced on the Mapping Mountains site on the 11.06.17, the hill was previously listed with c 76m of drop based on an estimated summit height of c 453m and an estimated bwlch height of c 377m with the latter based on interpolation of bwlch contouring between 370m – 380m.  This hill’s reclassification is due to LIDAR data analysed by Aled Williams and is also dependent upon the details for its adjacent hill of Allt y Derw (SN 873 834), with the height of the highest hill swapping, with this affecting the position of the critical bwlch of both hills and the status of Fuches, resulting in a 446.7m summit height and a 419.2m bwlch height, with these values giving this hill 27.5m of drop which is insufficient for its retention as a PedwarPedwar total decreases by one and confirmed as 442.





Bryn Crugog    446.7m at SN 94130 92357

The reclassification of this hill to Pedwar status was announced on Mapping Mountains on 06.06.17, the hill was previously listed as a 400m Sub-Pedwar with c 20m of drop based on the 447m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 427m bwlch height based on interpolation of bwlch contouring between 420m – 430m.  This hill’s reclassification is due to LIDAR data analysed by Aled Williams (and is also dependent upon the details for its adjacent hill of Esgair Hir [SN 937 925], see below) resulting in a 446.7m summit height and a 394.0m bwlch height, with these values giving this hill 52.7m of drop.  Pedwar total increases by one and confirmed as 443.





Esgair Hir    446.5m at SN 93723 92558

The announcement of this hill’s reclassification to 400m Sub-Pedwar status was made on Mapping Mountains on the 05.06.17, the hill was previously listed as a Pedwar with c 51m of drop based on the 448m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 397m bwlch height based on interpolation of bwlch contouring between 390m – 400m.  This hill’s reclassification is due to LIDAR data analysed by Aled Williams (and is also dependent upon the details for its adjacent hill of Bryn Crugog [SN 941 923], see above) resulting in a 446.5m summit height and a 423.7m bwlch height, with these values giving this hill 22.8m of drop which is insufficient for Pedwar qualification.  Pedwar total decreases by one and confirmed as 442.





Fainc Fawr    466.2m at SN 74150 89367

This reclassification from Pedwar to 400m Sub-Pedwar was announced on Mapping Mountains on 14.05.17, the hill was previously listed as a Pedwar with 32m of drop based on a basic levelling survey conducted by Myrddyn Phillips on 17.04.03 which resulted in 104ft (31.7m) of drop.  This hill’s reclassification is due to LIDAR data analysed by Aled Williams resulting in a 466.2m summit height and a 437.9m bwlch height, with these values giving this hill 28.3m of drop which is insufficient for Pedwar qualification.  Pedwar total decreases by one and confirmed as 443.





Fynach Fawr    461.4m at SN 72715 89052

The announcement of this hill’s reclassification was made on Mapping Mountains on the 12.05.17, the hill was previously listed as a Pedwar with c 32m of drop based on the 464m summit spot height on the Ordnance Survey 1:25,000 Explorer map and an estimated bwlch height of c 432m.  This hill’s reclassification to 400m Sub-Pedwar status is due to LIDAR data analysed by Aled Williams resulting in a 461.4m summit height and a 432.5m bwlch height, with these values giving this hill 28.9m of drop which is insufficient for Pedwar qualification.  Pedwar total decreases by one and confirmed as 444.





Cwm Cynydd Bank    451.4m at SO 05342 72437

This hill’s reclassification to Pedwar status was announced on Mapping Mountains on the 24.03.17, the hill was previously listed as a 400m Sub-Pedwar with c 27m of drop based on the 444m spot height on the Ordnance Survey 1:25,000 Explorer map and an estimated bwlch height of c 417m.  This hill’s reclassification to Pedwar status is due to LIDAR data analysed by Aled Williams resulting in a summit height of 451.4m and a bwlch height of 416.4m, with these values giving this hill 35.0m of drop.  Pedwar total increases by one and confirmed as 445.





Carreg y Gwynt    426.7m at SN 95698 77665

The announcement of this hill’s reclassification from Pedwar status was announced on the Mapping Mountains site on 17.03.17, the hill was previously listed as a Pedwar with 32m of drop based on a 104ft (31.7m) basic levelling survey conducted by Myrddyn Phillips on the 23.04.04.  This hill’s reclassification to 400m Sub-Pedwar status is due to LIDAR data analysed by Aled Williams resulting in a summit height of 426.7m and a bwlch height of 398.6m, with these values giving this hill 28.1m of drop, which is insufficient for it to retain its classification as a PedwarPedwar total decreases by one and confirmed as 444.





Esgair Wen    494.6m at SN 80767 66481


The reclassification of this hill from Pedwar to 400m Sub-Pedwar status was announced on Mapping Mountains on 11.03.17, the hill was previously listed as a Pedwar with 31m of drop based on the 496m summit spot that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and the 465m bwlch spot height that appears on the Ordnance Survey enlarged mapping hosted on the Geograph website.  This hill’s reclassification is due to LIDAR data analysed by Aled Williams with the resulting height details being 494.6m summit and 464.7m bwlch, giving this hill 29.9m of drop which is insufficient for it to be classified as a PedwarPedwar total decreases by one and confirmed as 445.






Pedwar total confirmed as 446.





Lan    413.6m at SO 05243 39144

This hill’s addition as a Pedwar was announced on the Mapping Mountains site on 30.12.16, the hill was previously listed as a 400m Sub-Pedwar with c 29m of drop based on an estimated summit and bwlch height of c 407m and c 378m respectively.  The reclassification to Pedwar is from LIDAR data analysed by Aled Williams with the resulting height details being 413.6m summit and 377.0m bwlch, giving this hill 36.6m of drop.  Pedwar total increases by one and confirmed as 446.





Twyn Disgwylfa    428.1m at SS 99572 95976

Confirmation of the reclassification via the Mapping Mountains site on 20.12.16, the hill was previously listed as a Pedwar with 30m of drop based on a 429m summit and 399m bwlch spot height.  The reclassification to 400m Sub-Pedwar is from LIDAR data analysed by Aled Williams with the resulting details being 428.1m summit and 399.3m bwlch, giving this hill only 28.8m of drop.  Pedwar total decreases by one and confirmed as 445.





Pt. 415.6m    415.6m at SO 24354 01195

The first hill to change in status to a Pedwar due to analysis of LIDAR data, with confirmation of the change in status via the Mapping Mountains site on 18.12.16, the hill was previously listed as a 400m Sub-Pedwar with c 28m of drop based on a 416m summit spot height and interpolation of bwlch contours.  The reclassification to Pedwar is from LIDAR data analysed by Aled Williams with the resulting details being 415.6m summit and 384.2m bwlch, giving this hill 31.4m of drop which is sufficient for Pedwar qualification.  Pedwar total increases by one and confirmed as 446.



 

Pt. 407.7m    407.7m at SO 18077 69277

Pt. 407.7m reclassified to a Sub-Pedwar due to a survey with the Trimble GeoXH 6000

Confirmation of this hill’s status change via the Mapping Mountains site on 17.04.16, the hill was previously listed as a Pedwar with 30m of drop based on a basic levelling survey conducted by Myrddyn Phillips on 15.12.03 which resulted in 98ft 6″ (30.0m) of drop.  This hill was subsequently surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips on 08.04.16, resulting in the hill having only 28.3m of drop.  Pedwar total decreases by one and confirmed as 445.





Craig y Garreg-lwyd    473.4m at SH 73044 42742

Craig y Garreg-lwyd proved a surprising reclassification

Confirmation of this hill’s reclassification was announced on the Mapping Mountains site on 20.03.16, the hill was previously listed as a Pedwar with 35m of drop based on a 478m summit and a 443m bwlch spot height appearing on the Ordnance Survey enlarged mapping on the Geograph website, which had been favoured for this hill’s drop value over a basic levelling survey conducted by Myrddyn Phillips on 06.01.04 which resulted in 99ft (30.2m) of drop.  This hill was subsequently surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips on 14.03.16, resulting in the hill having only 29.9m of drop.  This hill has subsequently been surveyed by John Barnard and Graham Jackson on the 24.06.17 using a Leica GS15 resulting in a 30.2m drop value and its re-instatement as a Pedwar (see above).  Pedwar total decreases by one and confirmed as 446.





Drysgol    483.6m at SN 94630 74415

Drysgol survived for a number of years as a Pedwar but changed status due to a survey with the Trimble GeoXH 6000

This hill’s status change was confirmed on the Mapping Mountains site on 17.03.16, the hill was previously listed as a Pedwar with 31m of drop based on a basic levelling survey conducted by Myrddyn Phillips on 13.05.05 which resulted in 102ft (31.1m) of drop.  This hill was subsequently surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips and Fergal Hingerty on 12.03.16, resulting in the hill having only 29.2m of drop, which is insufficient for it to retain its Pedwar status.  Pedwar total decreases by one and confirmed as 447.





Banc Bronderwgoed    404.2m at SN 87154 98796

Late evening light on Banc Bronderwgoed

Confirmation of this hill’s status change via the Mapping Mountains site on 06.10.15, the hill was previously listed as a Pedwar with 30m of drop based on a basic levelling survey conducted by Myrddyn Phillips on 16.10.03 which resulted in a drop value of 99ft (30.2m).  This hill was subsequently surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips and Aled Williams on 08.09.15, resulting in the hill having only 27.7m of drop, which is insufficient for it to retain its Pedwar status.  Pedwar total decreases by one and confirmed as 448.





Bryn Serth    403.9m at SO 14794 10908

The Trimble GeoXH 6000 survey ascertained that this hill is not c 410m high and reclassified it to the ranks of Sub-Pedwar

This hill’s status change was confirmed via the Mapping Mountains site on 05.09.15, with the change in classification being a surprise as the hill was listed with c 34m of drop based on a c 410m summit and c 376m bwlch height, with the summit height being an estimation based on a small 410m ring contour which is erroneous as no such height exists on the summit of this hill.  This hill was surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips and Mark Trengove on 12.08.15, resulting in the summit height being 403.9m and the bwlch being 378.6m, giving this hill only 25.4m of drop and therefore it is reclassified from a Pedwar to a 400m Sub-PedwarPedwar total decreases by one and confirmed as 449.





Wenallt    466.4m at SN 93366 57112

Wenallt proved a disappointment to lose from the Pedwar ranks

Confirmation of this hill’s status change was announced on the Mapping Mountains site on 23.05.15, the hill was previously listed as a Pedwar with 30m of drop based on the 468m summit spot height and the 438m bwlch spot height, with the latter appearing on the Ordnance Survey enlarged mapping on the Geograph website.  This hill was surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips on 21.05.15, resulting in a 466.4m summit and 438.1m bwlch height, with these values giving this hill a drop of 28.3m.  Pedwar total decreases by one and confirmed as 450.





Pt. 422.3m    422.3m at SO 07382 82231

Pt. 422.3m is now classified as a Sub-Pedwar

The first hill to be reclassified from a Pedwar to a 400m Sub-Pedwar through surveying with the Trimble GeoXH 6000, with the hill’s status change being confirmed via the Mapping Mountains site on 19.05.15, the hill’s listing as a Pedwar was based on Ordnance Survey spot heights of 424m at the summit and 393m at the bwlch, giving this hill 31m of drop.  This hill was subsequently surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips on 16.05.15, resulting in a 422.3m summit and 393.2m bwlch height, with these values giving this hill 29.0m of drop and therefore reclassifying it to 400m Sub-Pedwar status.  Pedwar total decreases by one and confirmed as 451.





Mynydd Poeth    419.3m at SH 95375 51301

Gathering data with the Trimble GeoXH 6000 at the summit of Mynydd Poeth

The reclassification of Mynydd Poeth was announced on the Mapping Mountains site on 26.12.14, the hill was previously listed as a 400m Sub-Pedwar with c 29m of drop based on the Ordnance Survey 417m summit spot height and an estimated bwlch height of c 388m.  This hill was surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips and Mark Trengove on 24.12.14, resulting in a 419.3m summit and 387.6m bwlch height, with these values giving this hill 31.7m of drop which is sufficient for its reclassification to Pedwar status.  Pedwar total increases by one and confirmed as 452.





Pt. 499.5m    499.5m at SH 66565 31003

Pt. 499.5m proved a welcome addition to the main list of Y Pedwarau

This hill’s reclassification to Pedwar status was announced on the Mapping Mountains site on 27.09.14, it was previously listed as a 400m Sub-Pedwar with c 27m of drop based on the Ordnance Survey 499m summit spot height on the enlarged mapping on the Geograph website and an estimated bwlch height of c 472m.  This hill was surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips, Mark Trengove and Dave Middleton on 21.09.14, resulting in a 499.5m summit and 469.2m bwlch height, with these values giving this hill 30.3m of drop, and it proves a welcome addition to the ranks of Pedwar hills.  Pedwar total increases by one and confirmed as 451.





Craig y Ganllwyd    430.9m at SH 70775 25853

Craig y Ganllwyd was reclassified to a Pedwar due to the survey with the Trimble GeoXH 6000

Confirmation of this hill’s inclusion into the Pedwar ranks was announced on the Mapping Mountains site on 07.05.14, it was previously listed as a 400m Sub-Pedwar in the Europeaklist publication with 26m of drop based on the 423m Harvey Maps summit spot height and the 397m bwlch spot height appearing on the Ordnance Survey enlarged mapping on the Geograph website.  This hill was surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips on 03.05.14, resulting in a 430.9m summit and 397.6m bwlch height, with these values giving this hill 33.4m of drop.  Pedwar total increases by one and confirmed as 450.





Cefn Perfa    411.2m at SO 1738957973

The confirmation that Cefn Perfa had sufficient drop to enter the ranks of Pedwarau waited until the hill was line surveyed

The status change of this hill was confirmed via the Mapping Mountains site on 13.03.14, having been previously listed in the Europeaklist publication as a 400m Sub-Pedwar with 29m of drop based on a basic levelling survey conducted on the 23.09.03 by Myrddyn Phillips resulting in 97ft (29.6m) of drop.  This hill was subsequently surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips on 11.01.14, resulting in the hill having 30.0m of drop, this was later confirmed with a survey conducted by John Barnard and Myrddyn Phillips on the 13.03.14 with the following results; 30.06m drop via line survey, 30.1m drop via survey with the Leica GS15 and 30.1m drop via survey with the Trimble GeoXH 6000.  Pedwar total increases by one and confirmed as 449.





Y Garn    474.2m at SH 75874 37543

Y Garn was the first hill to be reclassified to a Pedwar after the Europeaklist Y Pedwarau booklet was published

The first hill to be reclassified to a Pedwar through surveying with the Trimble GeoXH 6000, with the change in status being announced on the Mapping Mountains site on 02.03.14, the hill had been previously listed as a 400m Sub-Pedwar with 29m of drop based on the 474m summit spot height on Ordnance Survey 1:25,000 Explorer maps and a bwlch height of 445m, with the details for the latter deriving from a 1461ft levelled height on the old 1:2,500 map.  This hill was subsequently surveyed with the Trimble GeoXH 6000 by Myrddyn Phillips and Aled Williams on 01.03.14, resulting in the hill having 31.2m of drop, which is sufficient for qualification as a PedwarPedwar total increases by one and confirmed as 448.



6th January 2014 – Haroldstreet publishes Y Pedwarau. 

Pedwar total confirmed as 447.




23rd May 2013 – Europeaklist publishes Y Pedwarau. 

Pedwar total confirmed as 447.




Myrddyn Phillips and Aled Williams (January 2017)



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