Essential Refurbishment
Dinorwig to Pentir / O Ddinorwig i Bentir
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Mae National Grid yn newid y ceblau sy’n rhedeg o dan y ddaear rhwng gorsaf bŵer Dinorwig a’n his-orsaf ym Mhentir.
Y newyddion diweddaraf (Mehefin 2024)
Gan fod y tywydd yn dal i wella, rydym yn disgwyl symud ymlaen yn dda ym mis Mehefin.
Am gyfnodau ym mis Mai, roeddem yn gwneud llai o waith ar y ffyrdd ar ôl cytuno â Chyngor Gwynedd ar gynlluniau rheoli traffig y ddwy Ŵyl Banc. Dim ond un set o oleuadau dros dro oedd ar yr A4086 ac ar yr A4244.
Felly, roedd angen i ni atal y gwaith, ail-lenwi tyllau a rhoi wyneb newydd ar y ffordd yn y mannau lle gadawyd ein man gwaith yn gyfan gwbl. Efallai'ch bod wedi ein gweld yn atal y gwaith yn rhywle ac yn dod yn ôl wedyn.
Ar ôl atal ein gwaith mewn rhai mannau ym mis Mai, rydym yn ailddechrau mewn sawl man ym mis Mehefin. Gall pobl yr ardal ddarllen am ein gwaith yn ein cylchlythyr diweddaraf a anfonir ym mis Mehefin i bob cartref sy'n agos at ein gwaith.
Ein gwaith ym mis Mehefin:
Parhau â'r gwaith o osod dwythellau ceblau, ceblau a baeau uniadau yn yr A4244 a'r A4086.
Cau darn o'r ffordd yn Neiniolen rhwng Clwt-y-bont a'r A4244 am tua thri diwrnod ddechrau Mehefin fel y gallwn osod ein dwythellau yn ddiogel. Bydd pob ffordd arall yn yr ardal yn dal ar agor ac rydym wedi ysgrifennu at y trigolion i roi gwybod iddynt.
Ailddechrau gwaith ar y baeau uniadau ar yr A4244 ger troad Brynrefail. Rydym yn cau darn byr o’r ffordd ger y maes chwarae lle mae’n ymuno â’r A4244 o ddechrau Mehefin tan ganol Gorffennaf. Bydd pob ffordd arall yn yr ardal yn dal ar agor ac rydym wedi ysgrifennu at y trigolion i roi gwybod iddynt.
Dal ati hefyd i osod dwythellau ceblau yn y caeau i'r gorllewin o Gwm-y-glo.
Rheoli traffig
Lle rydym yn gweithio ar y ffyrdd, rydym yn dal i ddefnyddio goleuadau traffig dros dro i gadw defnyddwyr y ffyrdd a'n timau ni'n ddiogel. Er mwyn cael y wybodaeth ddiweddaraf ar leoliad goleuadau traffig ar yr A4244 a'r A4086, ewch i'r dudalen hon ar wefan Cyngor Gwynedd.
Ein gwaith hyd yma
Dechreuwyd ar ein gwaith yn yr hydref 2021, gan ddechrau yn ein his-orsaf ym Mhentir. Hyd yma, mae ein gwaith wedi canolbwyntio ar osod dwythellau o dan yr A4086, yr A4244 a dyfrffyrdd lleol, fel y gallwn roi’r ceblau newydd o dan y ddaear.
Er ein bod bron â gorffen y rhan hon o’r prosiect, sy’n achosi’r anhwylustod mwyaf, mae angen gosod rhai dwythellau o hyd, yn cynnwys darn rhwng Llanrug a’r gylchfan ger Brynrefail.
Ar hyn o bryd, rydym yn dychwelyd i rai mannau ar yr A4086 a’r A4244 i greu ein baeau uniadau, lle rydym yn tynnu’r ceblau pŵer mawr iawn a thrwm trwy'r dwythellau a osodwyd gennym. Rydym yn defnyddio timau arbenigol ac offer sy'n tynnu'r cebl o ddrwm mawr. Bydd yr offer i'w gweld, ond byddant yn cael eu storio mewn ardaloedd gwaith penodol.
Os oes angen baeau uniadau mewn ffyrdd neu gerllaw iddynt, defnyddir goleuadau traffig dros dro i gadw ein timau ni a defnyddwyr y ffyrdd yn ddiogel.
Trwy gydol ein gwaith, mae darnau o graig galed iawn o dan yr A4086 wedi achosi heriau mawr. Cymerodd lawer mwy o amser na'r disgwyl i ni gloddio trwyddynt. Er mwyn gorffen y gwaith hwn cyn gynted â phosibl, rydym wedi bod yn gweithio oriau hirach ac ar benwythnosau, gan ddefnyddio peiriannau mawr, arbenigol ag olwynion torri ac offer torri creigiau.
Tra byddwn yn gweithio ar ein prosiect, mae’n rhaid i ni gadw at nifer o ganllawiau a chyfyngiadau. Gelwir rhai o’r rhain yn ‘gyfnodau embargo’. Cânt eu pennu gan Gyngor Gwynedd, sef yr awdurdod sy’n gyfrifol am yr holl waith ar briffyrdd yr ardal. Mae adegau yn ystod cyfnodau gwyliau a gwyliau banc pan nad ydym yn cael gweithio ar y priffyrdd heb eu caniatâd nhw.
Am weddill ein prosiect, rydym wedi cytuno â Chyngor Gwynedd i wneud cyn lleied o waith ag y bo modd ar yr adegau prysur hyn o'r flwyddyn. Mae hyn yn golygu y bydd angen i ni stopio gweithio, ail-lenwi tyllau a rhoi wyneb newydd ar y ffordd mewn mannau lle byddwn yn gadael y safle'n llwyr. Yna, gall fod angen i ni ailgloddio ar ôl cyfnod yr embargo. Gall hyn gymryd rhai wythnosau'n ychwanegol gan olygu llawer mwy o ‘atal ac ailddechrau’. Dyna pam y gallech ein gweld yn rhoi’r gorau i weithio yn rhywle ac yn dychwelyd wedyn. Oherwydd y cyfyngiadau, bydd ein gwaith ar ffyrdd yr ardal yn parhau tan ddiwedd 2026.
Rydym yn sylweddoli bod pobl eisiau i ni gwblhau’r gwaith yn gyflym. Byddwn yn dal i gydweithio’n agos â Chyngor Gwynedd i geisio gorffen y gwaith yn gynt.
Gan edrych ymlaen at ran arall o'n gwaith, caiff darn o un o’n cylchedau ei osod o dan lwybr Rheilffordd Llyn Padarn ar lan ogleddol y llyn. Ar hyn o bryd rydym yn disgwyl i'r gwaith ddechrau yn hydref 2025 a pharhau tan haf 2026.
Rhaglen Grantiau Cymunedol
Bob blwyddyn, mae National Grid yn anrhydeddu elusennau a mudiadau nid-er-elw trwy roi grantiau cymunedol.
Rydym yn ariannu pob math o brosiectau sy’n cael eu rhedeg gan elusennau a grwpiau cymunedol sy’n cynnig gwahanol fathau o fudd cymdeithasol, economaidd ac amgylcheddol mewn ardaloedd lle mae gwaith National Grid yn cael effaith ar bobl leol. Gallai grwpiau a sefydliadau lleol ger y prosiect hwn fod yn gymwys i gael cymorth.
Mae’n bleser gennym ddweud ein bod eisoes wedi dyfarnu arian i sefydliadau sy’n gysylltiedig â’r prosiect hwn o dan y cynllun grantiau cymunedol. Er mwyn ymgeisio, mae angen cyflwyno cais a gaiff ei ystyried gan National Grid.
Os hoffech wybod mwy, a dysgu am y broses ymgeisio a’r meini prawf ar gyfer bod yn gymwys, ewch i: https://www.nationalgrid.com/responsibility/community/community-grant-programme.
Gorchymyn Prynu Gorfodol
Er mwyn sicrhau bod y prosiect newydd hwn yn cael ei gwblhau o fewn yr amserlenni gofynnol, mae angen i ni gaffael yr holl hawliau tir sy’n angenrheidiol i wneud ein gwaith.
I gefnogi’r gwaith o gyflawni’r hawliau tir hyn, gwnaethom Orchymyn Prynu Gorfodol National Grid Electricity Transmission plc (Prosiect Newid Ceblau Rhwng Dinorwig a Phentir) 2021 (y Gorchymyn) ar gyfer y prosiect hwn ar 24 Medi 2021. Ar 24 Ebrill 2023 cadarnhawyd y Gorchymyn gan yr Ysgrifennydd Gwladol dros Ddiogelwch Ynni a Sero Net gyda mân addasiadau (gweler y dogfennau a restrir isod). Rhoddwyd cyhoeddusrwydd i hyn ar 31 Mai 2023, a daeth y Gorchymyn i rym ar y diwrnod hwnnw.
Yn ogystal â’r uchod, gwnaethom gais hefyd i Weinidogion Cymru am dystysgrif yn unol â Pharagraff 6 o Atodlen 3 i Ddeddf Caffael Tir 1981 (y ‘Dystysgrif’) ar 17 Rhagfyr 2021. Dyfarnwyd y Dystysgrif gan Weinidogion Cymru a daeth yn weithredol ar ôl cyhoeddi’r hysbysiadau perthnasol, ar 23 Tachwedd 2022. Mae’r Dystysgrif yn caniatáu i ni gaffael hawliau dros dir agored sydd wedi’i gynnwys yn y Gorchymyn.
Isod fe welwch gopi o’r Gorchymyn sydd wedi’i gadarnhau, sydd hefyd yn cynnwys y Mapiau sy’n dangos y tir sydd wedi’i gynnwys. Fe welwch hefyd gopi o’r Dystysgrif, cynlluniau cysylltiedig a dogfennau perthnasol eraill sy’n gysylltiedig â’r Dystysgrif. Os hoffech chi ofyn unrhyw gwestiynau i ni am y prosesau uchod, cysylltwch â ni gan ddefnyddio’r manylion cyswllt uchod ar gyfer 'ymholiadau pellach'.
Dogfennu
National Grid is replacing the existing underground cables between Dinorwig power station and our substation at Pentir.
Latest update (June 2024)
The continuing improvement in weather means we anticipate making good progress in June.
In May, we reduced our activity on the roads for periods after agreeing our traffic management plans for both Bank Holidays with Cyngor Gwynedd, with only one set of temporary lights on the A4086 and on the A4244.
This meant we needed to stop work, re-fill and resurface the road in places where we had to remove our working area completely. This is why you may have seen us pause work in a location and return later.
Having paused our work in certain areas in May, we’re now resuming many of these from June. Local residents can learn more about our work in our latest newsletter, which is being sent to all homes near to our work in June.
Our work in June:
Continuing to install our cable ducting, cables and joint bays in the A4244 and A4086.
Temporarily closing a section of road in Deiniolen between Clwt-y-bont and the A4244 for approximately three days in early June, so we can safely install our ducting. All other roads locally remain open and we have written to local residents to let them know.
Restarting work on the joint bays on the A4244 near to the Brynrefail turn. We are closing a short section of the road near the playground where it joins the A4244 from early-June to mid-July. All other roads locally remain open and we have written to local residents to let them know.
Also continuing to install cable ducting in the fields west of Cwm-y-glo.
Traffic management
Where we are working on the highways, we are continuing to use temporary traffic lights to keep road users and our teams safe. For up to date information on where our traffic management is on the A4244 and A4086, visit this page on Cyngor Gwynedd’s website.
Our work so far
We started our work in Autumn 2021 with initial activity happening at our Pentir substation. To date, our work has focused on the installation of ducting under the A4086, A4244 and local waterways, to allow us to put the new cables underground.
While we’ve largely finished this most disruptive phase of the project, there are a few sections of cable ducting left to complete, including a length between Llanrug and the roundabout near Brynrefail.
We are now returning to some locations on the A4086 and A4244 to construct our joint bays, where we are pulling the very large, heavy power cables through the ducting we’ve installed. We use specialist teams and cable pulling equipment that takes cable from a large drum. This equipment will be visible but will be stored within designated working areas.
Where joint bays are needed in or near roads, temporary traffic lights are being used to keep our teams and road users safe.
Throughout our work, patches of very hard rock under the A4086 have caused considerable challenges. It has taken us much longer to dig through than we initially planned. To complete this activity as quickly as possible, we’ve been working longer hours and weekends, and using large, specialist machinery with cutting wheels and rock breakers.
While we undertake our project there are guidelines and restrictions we must follow. Some of these are called ‘embargo periods’, set by Cyngor Gwynedd as the authority responsible for all work on local highways. These are times during holiday periods and bank holidays where we are not permitted to work on the highways without their permission.
For the remainder of our project, we have agreed with Cyngor Gwynedd that we will minimise our work during these busy times of the year. This means we will need to stop, re-fill and resurface the road in places where we’re removing our work completely. We may then need to re-excavate again after the embargo period. This can take a few additional weeks and means our activity is much more ‘stop/start’ and why you may have seen us pause work in a location and return later. The restrictions mean our work on local roads will continue until the end of 2026.
We appreciate people want us to complete the work quickly. We’ll continue working closely and collaboratively with Cyngor Gwynedd to try and bring the completion date forward.
Looking ahead to a further phase of our work, a section of one of our circuits will be installed under the route of the Llanberis Lake Railway track, on the northern edge of Llyn Padarn. We currently anticipate this work starting in Autumn 2025, continuing until Summer 2026.
Community Grant Programme
Every year National Grid honours charities and non-profit organisations by awarding community grants.
We fund all types of projects run by charities and community groups that provide a range of social, economic and environmental benefits in areas where National Grid’s work has an impact on local people. Local groups and organisations near this project could be eligible for support.
We are pleased to say that we have already made awards to organisations associated with this project for the community grant scheme. The application process consists of submitting an application, which will then be reviewed by National Grid.
To find out more, and to learn about the application process and eligibility criteria, please visit: https://www.nationalgrid.com/responsibility/community/community-grant-programme.
Compulsory Purchase Order
To ensure that this cable replacement project is completed within the required timescales, we need to acquire all of the necessary land rights to do our work.
To support the delivery of these land rights, we made the National Grid Electricity Transmission plc (Dinorwig to Pentir Cable Replacement Project) Compulsory Purchase Order 2021 (the Order) for this project on 24 September 2021. On 24 April 2023 the Secretary of State for Energy Security and Net Zero confirmed the Order with minor modifications (see documents listed below). This was publicised on 31 May 2023, at which point the Order became operative.
In addition to the above, we also made an application for a certificate pursuant to Paragraph 6 of Schedule 3 to the Acquisition of Land Act 1981 (the ‘Certificate’) to the Welsh Ministers on 17 December 2021. The Certificate was granted by the Welsh Ministers and became operative from the publication of the relevant notices, on 23 November 2022. The Certificate allows us to acquire rights over open space land included in the Order.
Below you’ll find a copy of the confirmed Order, which also contains the Maps showing the land included. You will also find a copy of the Certificate, associated plans and other relevant documents associated with the Certificate. If you would like to ask us any questions about the above processes, please contact us using the 'further enquiries' contact details above.