Quarry at Marsden. It is unclear from the OS mapping whether this site was an expansion of an earlier one (HER 2404 or 2403), or a completely new one. If new it dated to after 1855. It was served by railway HER 2483. In 2004 during excavation work to strip topsoil from the limestone adjacent to Marsden Old Quarry Local Nature Reserve, to restore magnesian limestone grassland from rank grassland, a series of what looked like boreholes were found covering an area of approximately 10m x 10m. They may be test borings carried out in advance of quarrying activites, they may have had earlier origins or they may be natural.

A Pumping Engine House, probably associated with the adjacent Farding Lake. It is not shown on the 1st edition Ordnance Survey plan, so was presumably built after 1855.

Cleadon Pumping Station (Sunderland and South Shields W.W.) Cleadon Water Pumping Station NZ 389632(A). Another splended example by Thomas Hawksley, the ornamental grounds contain a neo-Italianate engine house, boiler house and cottages all dominated by a camponile chimney. Site purchased in 1859 by Sunderland and South Shields Water Company. Construction was largely complete by Feb 1862 with two steam powered with 2 Cornish beam engines and 3 cornish boilers, the station was electrified c1930. The complex forms part of a Conservation Area and the buildings are listed, the splendid chimney carrying the more prestigious 2* status {1}. Cleadon Hill Water Pumping Station of the Sunderland and South Shields Water Company is a fine complex of red brick buildings in an Italianate style, comprising an engine house, boiler house, coal store, workers cottages and a detached chimney in the manner of a campanile, which has an enclosed staircase to a gallery at the top and is 100 feet tall. This station has been operating since 1863, pumping some 1 million gallons of water per day to South Shields. The original beam engine, powered by steam was replaced by electrical pumps in 1930 {2}. All buildings now converted into residential dwellings apart from the chimney.

This Pumping Engine House is not shown on the 1st edition Ordnance Survey plan, so was presumably built after 1855.

A quarry, marked as ‘Old’ on the 2nd edition Ordnance Survey plan but not shown on the 1st edition, so probably active between 1855 and 1895. The precise location of the quarry is unclear.

This 1000 yard Rifle Range at West Harton, with associated buildings is not shown on the 1st edition Ordnance Survey plan, so was presumably built after 1855.

West Harton Brick Works are not shown on the 1st edition Ordnance Survey plan, so were presumably built after 1855.

Whiteleas Brick Works are not shown on the 1st edition Ordnance Survey plan, so were presumably built after 1855.

A possible Moat, to the east of Eppleton Old Hall. It appears on the 1st edition Ordnance Survey plan to be a sub-rectangular, three sided feature. On the 2nd edition Ordnance Survey plan this has been partly backfilled.

The Wire Rope Works are not shown on the 1st edition Ordnance Survey plan, so were presumably built after 1855.