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The conversion 1 sea mile = 6080 ft was obtained by calculation from the Port of London handbook (see below). This is different to the nautical mile of 1852 m. This is a route-map template for a UK waterway. For a key to symbols, see {{waterways legend}}. For information on using this template, see Template:Routemap.
Richmond Lock is managed by the Port of London Authority. Most of the Environment Agency's locks and weirs are staffed by a lock keeper, who often lives in a house adjacent to the lock. The lock keeper's duties involve both operating the lock, and managing the river levels above the lock by adjusting the weir openings.
The Thames Path uses the existing Thames towpath between Inglesham and Putney Bridge wherever possible. The former Thames and Severn Canal entrance is the present-day limit of navigation [13] [14] for powered craft, and is one and a half miles upstream of the highest lock (St John's Lock), near Lechlade. [15]
In 1890, after many years of petitioning, an act of Parliament was enacted to build the half-lock and weir, the Richmond Footbridge Sluices, Lock and Slipway Act 1890 (53 & 54 Vict. c. ccxxiv). This is among a small minority of Thames locks not to have been built around an island or islands (aits).
St John's Lock, below the town of Lechlade, Gloucestershire, is the furthest upstream lock on the River Thames in England. The name of the lock derives from a priory that was established nearby in 1250, but which no longer exists. The lock was built of stone in 1790 by the Thames Navigation Commission.
Hambleden Lock is a lock with a long weir situated on the River Thames in England, about 2 miles downstream of Henley Bridge. The lock is on the Berkshire bank between Aston and Remenham . Built by the Thames Navigation Commission in 1773, the lock is named after the village of Hambleden , a mile (1.5 km) to the north.
Caversham Lock is a lock and main weir on the River Thames in England at Reading, Berkshire. Both the lock and main weir are connected to De Bohun Island (colloquially known as Lock Island). The Thames Navigation Commissioners built the original lock in 1778. Additional sluices north of View Island and Heron Island form the whole weir complex.
Marsh Lock is a lock and weir situated on the River Thames in England, about 1 mile upstream of Henley Bridge in Henley-on-Thames, Oxfordshire. The lock is close to the Berkshire bank, but accessed from the Oxfordshire side via two long walkways, the downstream one being near Mill Meadows .