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table of contents dinorwic quarry 6 languages cymraeg deutsch gaeilge italiano kernowek 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide coordinates 53 07 34 n 4 05 53 w 53 12611 n 4 09806 w 53 12611 4 09806 from wikipedia the free encyclopedia former slate quarry in north wales dinorwic vivian quarry part of the dinorwic quarry location in gwynedd location dinorwig near llanberis gwynedd formerly caernarfonshire wales 53 07 34 n 4 05 53 w 53 12611 n 4 09806 w 53 12611 4 09806 sh 59631 60860 products slate type quarry opened 1787 1787 closed july 4 1969 1969 07 04 unesco world heritage site part of the slate landscape of northwest wales criteria cultural ii iv reference 1633 002 inscription 2021 44th session dinorwic quarry d ɪ ˈ n ɔːr w ɪ ɡ din or wig welsh dɪˈnɔrwɪɡ also known as dinorwig quarry is a large former slate quarry now home to the welsh national slate museum located between the villages of llanberis and dinorwig formerly dinorwic in wales at its height at the start of the 20th century it was the second largest slate quarry in wales and thus the world after the neighbouring penrhyn quarry near bethesda 1 dinorwic covered 700 acres 283 ha consisting of two main quarry sections with 20 galleries in each extensive internal tramway systems connected the quarries using inclines to transport slate between galleries 2 since its closure in 1969 the quarry has become the site of the national slate museum a regular film location hiking location 3 and an extreme rock climbing destination history edit this section does not cite any sources please help improve this section by adding citations to reliable sources unsourced material may be challenged and removed august 2024 learn how and when to remove this message walter warwick vivian manager of dinorwic in 1896 the first commercial attempts at slate mining took place in 1787 when a private partnership obtained a lease from the landowner assheton smith although this was met with moderate success the outbreak of war with france taxes and transportation costs limited the development of the quarry a new business partnership led by assheton smith was formed on the expiry of the lease in 1809 and the business boomed after the construction of a horse drawn tramway to port dinorwic in 1824 at its peak in the late 19th century when it was producing an annual outcome of 100 000 tonnes dinorwic employed more than 3 000 men and was the second largest opencast slate producer in the country although by 1930 its working employment had dropped to 2 000 it continued in production until 1969 quarrying edit dinorwic quarry showing major inclines mills levels and tramways and the padarn railway and dinorwic railway the slate vein at dinorwic is nearly vertical and lies at or near the surface of the mountain allowing it to be worked in a series of stepped galleries this is however not quite how the quarry developed the first quarrying was spread across several sites adelaide allt ddu braich bryn glas bryn llys chwarel fawr ellis garrett harriet matilda morgan s raven rock sofia turner victoria and wellington 4 this was a situation that lasted for many years certainly until the mid 1830s the 1824 railway brought transport problems produce from the upper quarries was not a problem but wellington ellis turner harriet and victoria quarries were all below the level of the railway this was a problem solved in the 1840s when the lake level railway was built and the quarry as we know it began to take shape adelaide quarry became a part of allt ddu and chwarel fawr and chwarel goch became linked to it too in the great new quarry raven rock and garret quarries became one massive quarry operating as an open hillside gallery quarry with the lowest two levels being accessed by tunnels harriet morgans and sofia quarry are all still identifiable as separate pits today whilst braich quarry became a large working of three contiguous smaller pits below this the galleries of victoria and wellington were joined along the hillside and continued downwards in two separate main workings wellington and hafod owen each was eventually to contain several small sinks too some below lake level the current form of the quarry is little different from that of the time of the great war save for enlarging of the actual quarry faces and deepening of the sinks certainly all the main inclines were in place very little was altered until closure 5 the nearby marchlyn quarry was opened in the 1930s to provide access to the main slate vein higher up the mountain closure edit the quarry closed in july 1969 the result of industrial decline and difficult slate removal 2 during the 1950s 60s extraction had become difficult because after 170 years of extraction many of the unsystematically dumped tips were beginning to slide into some of the major pit workings and after an enormous fall in the garret area of the quarry in 1966 production had ceased almost permanently it was however decided that some final work could be done by clearing some of the waste from the garret fall this involved making an access road for more modern quarry vehicles across some of the terraces to the rockfall this amount of slate won by this method was small and all production stopped by 1969 at the receiver s instruction a public auction was arranged intended to pay off some of the quarry s debts the auctions were held on 12 and 13 december 1969 the auctioneer s national advertisement in the guardian 29 november 1969 the event was described as an auction sale of machine tools and stocks four hunslet locos and engine and boat fittings the locomotives referred to lots 613 616 were dolbadarn red damsel wild aster and irish mail before the bidding started it was announced that gwynedd county council had placed a preservation order on the gilfach ddu workshops and many items within it transport edit main articles dinorwic railway and padarn railway the vivian transporter incline completed in 1873 and restored in 1998 the transporters run on 5 ft 6 in 1 676 mm gauge tracks the original connection between the quarry and the company s port at y felinheli was the dinorwic railway a 2 ft 610 mm gauge line built in 1824 this was worked by horses and it soon became apparent that it was inadequate for the traffic generated by the quarry a number of surveys of alternative routes were undertaken by members of the spooner family the result of which was the construction of a new railway which opened in 1848 the 4 ft 1 219 mm gauge padarn railway which operated as the quarry s main transport link until closure in 1961 2 tramways edit the first use of railways at the quarry came around 1800 when the first internal tramways were in use these first lines were worked using horse and hand power for the next seventy years the tramway system grew until it reached the point where more powerful traction was required the first steam locomotives used were small vertical boiler locos supplied by de winton s of caernarfon in 1870 the first locomotive supplied by the hunslet engine company arrived at the quarry and the majority of the locomotives that worked at dinorwic were eventually supplied by hunslet 2 between 1935 and 1949 the quarry acquired 22 light internal combustion rail tractors for use on the levels half of these were new the other half second hand their survival rate did not match those of the steam locomotives and when the quarry closed in 1969 only three still survived although a nominal two foot gauge the actual gauge between the rails at dinorwic was 1 ft 10 3 4 in 578 mm 6 in common with its neighbour penrhyn but fractionally narrower than the public lines of the ffestiniog railway or north wales narrow gauge railway which were 1 ft 11 1 2 in 597 mm locomotives edit early steam locomotives were used by the quarry and built by de winton co but from 1870 the quarry acquired most of its locomotives new from the hunslet engine company of leeds these were purpose built initially using a series of hunslet general unclassified designs but after 1886 these fell into one of three classes alice port larger and designed primarily to work at port dinorwic although michael never did tram or mills worked on marshaling duties on the padarn peris tram line which linked the quarry mills to the padarn railway for transportation to port dinorwic orig name number later name image builder year acquired year sold notes wellington de winton c1870 1898 harriet de winton 1874 pre 1895 peris de winton 1875 pre 1895 victoria de winton 1876 pre 1895 padarn de winton c1898 dinorwic charlie hunslet 1870 by 1919 george minstrel park hunslet 1877 by 1919 louisa hunslet 1877 by 1989 sybil w g bagnall 1906 restoration project taking place at the west lancashire light railway no 70 barclay sons 1931 1962 elidir avonside engine 1933 1966 velinheli hunslet 1886 1965 alice class now preserved at the launceston steam railway currently on loan to the ffestiniog railway 7 alice king of the scarlets hunslet 1889 1965 alice class preserved at the statfold barn railway enid red damsel later elidir hunslet 1889 1969 alice class no 1 rough pup hunslet 1891 1968 alice class preserved at the ngm no 2 cloister hunslet 1892 1962 alice class preserved at the statfold barn railway the first bernstein hunslet 1892 1967 alice class the second covertcoat hunslet 1898 1964 alice class wellington george b hunslet 1898 1965 alice class now at the bala lake railway 8 no 3 holy war hunslet 1902 1968 alice class no 4 alice hunslet 1902 1972 alice class no 5 maid marian briefly covertcoat hunslet 1903 1966 alice class no 6 irish mail hunslet 1903 1969 alice class preserved at west lancashire light railway no 7 wild aster now thomas bach hunslet 1904 1969 alice class now running on the llanberis lake railway no 1 lady joan hunslet 1922 1967 port class preserved at bredgar and wormshill light railway no 2 dolbadarn hunslet 1922 1969 port class michael hunslet 1932 1965 port class preserved at the statford barn railway vaenol jerry m hunslet 1895 1967 tram mills class now at the hollycombe steam collection port dinorwic cackler hunslet 1898 1966 tram mills class port dinorwic edit this section needs more citations please help improve this section by adding citations to reliable sources unsourced material may be challenged and removed october 2023 learn how and when to remove this message port dinorwic y felinheli was initially only a tidal creek on the menai strait s mainland shore called aber pwll moel y don or felin heli the assheton smith family of vaynol established a tiny wharf on a marshy inlet to convey the output of its dinorwic quarry in 1793 which marked the beginning of the development of the dock system and related buildings it was located directly downstream of a tide powered grain mill that gave the region its welsh name y felinheli and replaced an earlier setup where slate was lightered into the menai straits from 500 metres to the southwest slates from dinorwic quarries were hoisted onto lighters and transported to ships anchored further offshore in the menai strait until the quays were opened in 1809 allowing ships to be loaded directly the name port dinorwic was being used by 1824 and in this year a tramroad from dinorwic quarries the dinorwic railway was opened in 1848 a steam operated railway on a new track replaced the tramroad and operated until 1961 the padarn railway or the dinorwic quarries railway as it was also known belonged to the quarry company it was constructed with a four foot gauge but transported slate waggons with a nominal two foot centre to centre gauge from the gilfach ddu quarry yard to penscoins at the top of the escarpment with a view of port dinorwic from the transporters they were unloaded here and lowered down a self acting incline to the port where locomotives moved them to the quays despite the fact that these locos were close to but not identical to those employed in the quarry they were occasionally moved between places the buffer beams on the port locos caused particular difficulties when trying to get them up the inclines to the higher levels of the quarry but it was achieved docks and quays were constructed in 1809 lock gates were added in 1828 dry docks and engineering facilities were built in the 1830s a new outer basin was finished in 1854 an outer lock was added in 1897 and a new sea wall was built in 1905 between the harbour and basin to extend the quays in 1852 a standard gauge extension of the chester and holyhead railway reached port dinorwic although nearly 90 of the slate continued to be transported by sea exclusively in rented vessels the dry dock was a unique facility in north wales making it very valuable to coastal shipping while the vessels were there the engineering shops of the dry dock co also were looking to have merddin emrys s boiler repaired with new copper fireboxes and retubing the fr co got estimates from avonside engine company of bristol and the quarry engineering works at port dinorwic the boiler was eventually sent to bristol to get the work done in 1892 the first steamship owned by a quarry was purchased port dinorwic was never the fully developed maritime community of the nineteenth century that porthmadog was in part because it shared ownership with the quarry and was devoted to its commerce for instance it lacked a sizable shipbuilding sector and the surveyor for ship insurance in port dinorwic worked for the portmadoc mutual ship insurance society the organisation has no less than thirteen surveyors working in porthmadog other visiting steamers that were not owned by the quarry were nevertheless crucial after the first world war the ships owned by dinorwic quarry were underrepresented in a 1925 photograph of coastal steamers post closure edit national slate museum edit welsh slate museum located in gilfach ddu following closure the quarry s workshop at gilfach ddu was acquired by the then caernarfonshire county council who now lease the building to the national museum and galleries of wales it now houses the national slate museum equipment from the internal quarry railway was used to build the llanberis lake railway over part of the trackbed of the padarn railway the quarry has been partly used by the dinorwig power station a pumped storage hydroelectric scheme many of the hunslet locomotives have been preserved on several of britain s narrow gauge heritage railways more recently new build versions of the class have been built by the exmoor steam railway and by a new hunslet company at the statfold barn railway film location edit in 1987 part of the film willow was shot in the dinorwic quarry on the lower te...
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