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Latitude: 50.2804 / 50°16'49"N
Longitude: -5.2327 / 5°13'57"W
OS Eastings: 169782
OS Northings: 47271
OS Grid: SW697472
Mapcode National: GBR Z3.9GJR
Mapcode Global: VH12C.861W
Plus Code: 9C2P7QJ8+5W
Entry Name: Lower Engine House (At SW698472)
Listing Date: 31 October 1988
Grade: II
Source: Historic England
Source ID: 1138036
English Heritage Legacy ID: 63860
ID on this website: 101138036
Location: Porthtowan, Cornwall, TR4
County: Cornwall
Civil Parish: St. Agnes
Traditional County: Cornwall
Lieutenancy Area (Ceremonial County): Cornwall
Church of England Parish: Mount Hawke with Mithian
Church of England Diocese: Truro
Tagged with: Chimney
ST AGNES TYWARNHAILE MINE
SW 74 NW
7/232 Lower Engine House (at SW698472)
-
GV II
Ruins of pumping beam engine house, disused. Circa early C19. Killas rubble walls,
timber lintels over the openings.
Plan: Rectangular plan engine house of a possibly unique design. This was the last
engine house to be fitted with a wooden bob (the beam of the beam engine). No
surviving machinery.
Exterior: 3 storeys. Unaltered elevations. Front (bob) gable wall has central
doorway and tall wide opening to the partly fallen gable. Rear gabled end is blind.
Right-hand (nearside) wall has doorway on the left and a central first floor opening.
Left-hand (offside) gable end wall has doorway on the right and central first floor
opening. The upper floor walls are stepped in from the floors below.
Interior has remains of original plaster.
Sources: Source: Sharpe, Adam and Smith, John. Engine Houses in St Agnes Parish.
(Cornwall Archaeological Unit survey for Carrick District Council.
Listing NGR: SW6978247271
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