History
In 1778, the Cann Slate Quarry was owned by John Parker, and in order to make transport of the slate easier, he asked the engineer John Smeaton to survey a canal, to run from the quarry to the bridge at Marsh Mills. The River Plym between the bridge and Plymouth was navigable by barges. Although Smeaton carried out the work, he concluded that the canal, which would be 2.25 miles (3.62 km) long and would need several locks to accommodate the drop of 30 feet (9.1 m) in level, was unlikely to be economic, since the only trade would be the output from the quarry. He therefore suggested that a tramway would be a better solution, and could be built for about half the cost of the canal. Parker did not proceed with either option.
In 1819, an Act of Parliament was obtained which authorised the construction of a horse tramway between Princetown and Plymouth. In 1821, the directors of the Plymouth and Dartmoor horse tramway applied for a second Act, to authorise a deviation to the route, and in order to obtain consent for the new route from Parker's son, also called John Parker and Earl of Morley since 1815, they agreed to build a branch, possibly including an inclined plane, to the quarry. The company ran into financial difficulties, and the branch was not built. Despite the fact that he was a member of the management committee for the tramway, Parker took legal action against the three directors who had proposed the branch. They suggested that he should build the branch himself, and in return, all goods transferring from it to the existing tramway would be subject to lower tolls.
Parker proceeded to build a tub-boat canal from the quarry to Marsh Mills. It was about 6 feet (1.8 m) wide, and stopped above the bridge. He then wrote to the tramway company, suggesting that he was undecided whether to complete the canal by tunnelling under the turnpike road to connect it to the river, or to link it to their tramway at Crabtree by building a private branch. The letter resulted in an agreement on tolls, and the private tramway was built to complete the link. The canal was a little under 2 miles (3.2 km) long, and the tramway was about 0.5 miles (0.80 km) long. It crossed the river on a cast iron bridge with two arches.
The canal was opened on 20 November 1829. Some time after 1834 and before 1839, Earl Morley's tramway was extended up the valley to Cann Quarry. Near the quarry, it was built on the canal bank, but lower down it was built further to the west. Once it was opened, the canal ceased to be used as a navigation and served as a mill leat for the corn mill at Marsh Mills. A branch of the tramway, which was built to the unusual gauge of 4 ft 6 in (1,372 mm), was constructed from Plym Bridge to the quarries at Lee Moor, and the whole railway became known as the Lee Moor Tramway. The South Devon and Tavistock Railway built a branch up the Plym Valley, which was completed in 1854. For most of its route between Marsh Mills and the quarry, it was built between Earl Morley's tramway and the canal. The new railway cut across the quarry, which closed the following year. Marsh Mills corn mill continued to operate until 1927, when the owners became bankrupt.
Read more about this topic: Cann Quarry Canal
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