History in Structure

Entrance Lock to the Tamar Manure Navigation

A Grade II Listed Building in Calstock, Cornwall

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Coordinates

Latitude: 50.5164 / 50°30'59"N

Longitude: -4.2088 / 4°12'31"W

OS Eastings: 243505

OS Northings: 70843

OS Grid: SX435708

Mapcode National: GBR NS.JYK2

Mapcode Global: FRA 272P.N4S

Plus Code: 9C2QGQ8R+HF

Entry Name: Entrance Lock to the Tamar Manure Navigation

Listing Date: 19 October 1987

Grade: II

Source: Historic England

Source ID: 1329331

English Heritage Legacy ID: 60893

ID on this website: 101329331

Location: Gunnislake, Cornwall, PL18

County: Cornwall

Civil Parish: Calstock

Traditional County: Cornwall

Lieutenancy Area (Ceremonial County): Cornwall

Church of England Parish: Calstock

Church of England Diocese: Truro

Tagged with: Lock

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Gunnislake

Description


CALSTOCK WEIR HEAD
SX 4271-4371
7/145 Entrance Lock to the Tamar Manure
Navigation
GV II
Entrance lock at the southern entrance to the Tamar Manure Navigation; remains of
entrance lock at the northern end. Dated PR 1798, although said to have been built
in 1808. Granite ashlar walls to the lock, with one pair of wooden lock gates with
iron winding gear for the sluices.
Plan: The lock basin is about 25 metres long, with the gated at the southern end ; at
the northern end of the canal, granite ashlar walls remain.
The granite ashlar walls are splayed back at each end of the lock basin ; the lock
gates are partially collapsed. Granite mooring post at south end. Iron winding gear
remaining for sluices. At the northern end of the canal, the granite ashlar walls
remain, no gates.
The canal was built for the Tamar Coal Manure and General Mercantile Company;
diverted and shortened by the Duke of Bedford in early C20. The canal continued to
be used to supply coal to Gunnislake Gas Works until 1914. The Company was
liquidated in 1942. The canal is listed as an Ancient Monument, No. 984.
Sources: Tamar Valley Project. Booker, F.: Industrial Archaeology of the Tamar Valley
1967.


Listing NGR: SX4350570843

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