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

External Links

• Historic England Listing
• Wikidata Q26614619

External links are from the relevant listing authority and, where applicable, Wikidata. Wikidata IDs may be related buildings as well as this specific building. If you want to add or update a link, you will need to do so by editing the Wikidata entry.

Recommended Books

• 
  England's Post-War Listed Buildings
• 
  Pioneers of Modern Design: From William Morris to Walter Gropius (Penguin Art & Architecture)
• 
  Berkshire (Pevsner Architectural Guides: Buildings of England)
• 
  Northumberland (Pevsner Architectural Guides: Buildings of England)
• 
  Bristol (Pevsner Architectural Guides: City Guides)
• 
  Cambridgeshire (Pevsner Architectural Guides) (Pevsner Architectural Guides: Buildings of England)