Large commemorative stone celebrating the successful sinking of South Gosforth Colliery. On the east face the inscription reads "Main Dike distance from pit 319 yds cut 3rd June 1828". On west face "Main Dyke". The stone now lies on a modern housing estate and commemorates a shaft sinking that was achieved with great difficulty. The sinking is described in Hair 1844. Marker stone. Sandstone ashlar. Circa 1828. Round-topped slab about 1.5 metres high. The Main or 90 fathom dike was a serious obstacle to coalmining in Northumberland. An underground ball was held to commemorate this event; each guest hewed a souvenir piece of coal. LISTED GRADE 2

Stone and brick-built entrance to stone-lined tunnel; interpreted as a drift mine, but may have been for a railway incline. Restored by City Council in 1986. Part of the inclined railway from the Scotswood Delaval Drift passes under the former Scotswood, Newburn and Wylam Railway in the form of a tunnel passing through the embankment of the Railway across the road from the Vickers' Works.

Wooded area containing dispersed shafts with collars of spoil and also the earthwork remains of a horse-drawn waggonway. The shafts may date from 1551-1581, but are more likely to have been Silvertop's workings of 1728.

References to coal working on the Gibside estate date from 1607 and ceased with the closure of a small drift mine in 1884. There are a few visible shaft mounds at this grid reference (further mounds, adits and a drift mouth at NZ 182 593 see HER 3653).

Recommended as a site with potential 17th century workings, but no surface features were identified in this area during the survey.

Sunk in 1909, Westoe was heavily modernised in the 1950s with the construction of two tower mounted friction winders and a modern coal preparation plant. The site has recently closed and awaits demolition. Westoe Colliery was begun in 1909 as a man-riding shaft for the nearby St Hilda's Colliery. It became a producing mine when the old colliery closed in 1940. A major reconstruction scheme commenced in 1957. The early 1960s tall enclosed winding tower of the Crown Shaft dominates the site. An unusual but sadly lost feature of the mine was the electrically operated railway which connected the colliery with staiths at Harton adjacent to Mill Dam. The railway had been installed by the original German owned Harton Coal Company. Site now cleared for a housing development [2001].

This building was listed Grade II in 1985 with the following description:
'Colliery baths, now workshops. 1933 by R.A. Frizell for the Welfare Committee. Brick. Style : Dutch school. 2-storey block around central water tower, with one- storey porch and offices on south and east. Elevation to street: full height blind bay at left; central one-storey porch containing concrete architrave to boarded double door flanked by narrow windows with wrought iron grilles; set back above door is a tall tripartite stair window having brick mullions and metal glazing bars; a similar window in right return to stair; set back at right is a full-height bay containing vehicle entrance on rollers. 7 recessed brick courses form decorative band at first floor level and on tower; soldier courses at windows hide steel lintels; parapets of soldier courses or of bonded vertical courses. Interior : stainless steel balustrades to 2 original stair- cases; some ceramic tiled shower compartments with integral towel hooks survive. Wall and railings in front : goemetric pattern wrought iron railings on low brick wall with curved brick coping along street, canted at corner, and partly on right return. Historical note : the only remaining building of Elemore Colliery.'
Frizzell designed modern movement brick-built bath house. The modernist detailing around the entrance, railings and staircase are of particular note and the boiler chimney is prominently displayed {1}. One of the earliest references to the building of pit-head baths in the North East Coalfield was in April 1855 when Cramlington Colliery owners were reported to have opened 'warm baths and showers at the colliery for their men'. However, pit-head baths are more a 20th century phenomenon, and a large number of baths were built following the Mines Industry Act 1926. Many architecturally interesting buildings were erected by the Miners' Welfare Committee from about 1933 onwards - Elemore being one of these. A remarkable series of baths were built between 1933 and 1939 for the collieries of Northumberland. In Durham elegant designs were followed at Silksworth, Easington and Elemore, all of which were designed by F.G. Frizzell. Approximately 30 pit-head bath buildings were erected in Durham in the period after 1932, all brick built and most characterized by the dominant display of the chimney and water tank. The impressive external design of the building at Elemore was complimented by an interior of considerable quality - all of which was achieved at a reputed cost of £1500. Few of Frizzell's baths now survive in the region but those at Elemore are now occupied by a small engineering firm {2}.

Colliery brick stable block built after 1919 and associated with Rickless Drift which was used for ventilation, man-riding and pit pony access 1890-1948. The building is still used for stabling.

Temporary power station was opened at Philadelphia by the Sunderland District Electric Tramways Ltd in 1905, beside their tramway depot. In 1906 a permanent station had been built by the Durham Collieries Power Company who supplied 'Lambton and Colliery Co' (Lambton and hetton Collieries Co Ltd from 1911) and the tramway company. Incorporated into NESCO by 1911 (changed frequently from 50Hz to 40Hz). Currently occupied by a container firm. Elements of site survive, particularly 3 stone buildings. Largest is a generating hall with tall, round-headed openings and red-brick detailing. Interior contains iron-framed walkway with stairs and control cabin; crane supports, toilets, tiled lower walls. Substantial basement with features implying machinery (boilers?). Iron roof trusses. Two smaller buildings, similar style, interiors not inspected. Built 1906 as a power station for the Durham Collieries Power Company in yellow brick with red brick dressings. The building has been in more recent years a central garage for the former National Coal Board. The building was recorded by TWM in 2011. LISTED GRADE 2

Generating Hall and possibly boiler house adjacent. The whole structure now embedded in later buildings of TSL. The main hall now used as a warehouse. It is brick built with a corrugated sheet curtain gable at east end. The west end has a brick corbelled decorative parapet with sandstone capping. The peak of the gables is stepped to finish the roof ridge louvres and roof lights. The roof is slated. The west gable is pierced by three round-topped windows at switch gallery level (first floor). Interior retains original white tiling and signs of wall fittings. Otherwise completely stripped for reuse. First General Power Station for bulk electricity in the UK. Designed by Merz and McClellan for Walker and Wallsend Union Gas Co. Taken over by NESCO to replace Pandon Station (lighting only). Charles Merz, engineer, chose reciprocating engines rather than the new turbines, reflecting slowness of customers to accept reliability of the new technology. Within a year, plans to enlarge station and install turbines. Included a 1500kW 3-phase turbine set for public supply. Engine house survives within Thermal Syndicate Complex on Neptune Bank. Opened in 1901, designed by Charles Merz and William McLellan. Charles Merz was the son of Theodore Merz, one of the directors of NESCO, who pioneered the idea of a central power station supplying current for industry on an industrial scale. The Neptune bank Power Station took over from Pandon Dene (HER 5152). The engine house survives within the Thermal Syndicate Complex on Neptune Bank. Britain's first supplier of three phase electricity for industry. Overtaken by Carville Power Station (HER 1912) in 1903.