22653

 

II  

Designated  

04/11/1999  

04/11/1999  

Incline, Drumhouses and Counter Balances ('A' Incline)  

 

Gwynedd  

Llanddeiniolen  

Caernarfon  

Gilfach Ddu  

258762  

360299  

 

Incline rising steeply to the north-east of the former Dinorwic Slate Quarry Workshops, running initially south-eastwards and then just to the south-west of the former quarryworkers' barracks turning sharply at a 45 degree angle to the north-east.  

Industrial  

 

The Dinorwic Quarry was first established in 1787, taking over existing workings in the area, the first incline being built in 1789. By the 1830s there was a tramway system on each terrace of the quarry, steam locomotives being introduced in the 1870s. The eventual scale of the quarry was such that its output of c100,000 tons p.a. in the late 1890s put in on a par with Penrhyn, representing almost a quarter of the total production of Welsh slate. The quarry finally closed in 1969. The lower 4 pitches of this incline (the 'A' incline) brought material down from Mills Level of the quarry to the Padarn Railway loading platforms, the sharp turn between Drumhouses A 2 and A3 marking a replacement of earlier inclines which ran straight down at this point. The upper pitches (not included on this List) have been modified to carry cables for the Llanberis hydro-electric company and the drumhouses demolished.  

Drumhouses of local rubblestone and slate-slab construction, the latter predominating, each with a gable-ended graded slate roof, that to drumhouse 2 in poorest condition with a number of slates missing at time of Survey. Each drumhouse retains a winding drum and cabling, the double track with rails to the incline itself remaining almost completely in situ. The lower drumhouses (1 and 2) have brakesman's cabins alongside, well-built with fireplaces, the latter having a contiguous office with squint window offering a view of approaching wagons. At this point a stone-walled path leading from Dinorwic down to Llanberis is carried over the incline by means of a cast-iron girder bridge, while the wall bounding the track on its south-western side has heavy slate slabs cantilevered out to provide shelter for the men handling the wagons.  

 

Included as a remarkably well-preserved incline with drumhouses and counter balances forming an integral part of the former Dinorwic Slate Quarry complex and particularly important for the impressive physical evidence it provides for the distribution of slate away from the quarry. Scheduled Ancient Monument (177).