Entrance Lock To The Tamar Manure Navigation

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