A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways...

items of importance Lock (water navigation), a device for boats to transit between different levels of water, as in a canal Lock (film), a 2016 Indian Punjabi-language...

to the River Thames at Bow Creek; its first lock is Hertford Lock and its last Bow Locks. The Lee Navigation is named by Acts of Parliament and is so marked...

it included a clause that made the water companies responsible for the lock gates, because water from the navigation would be pumped to the reservoir,...

Wakefield, by the construction of 16 locks. Lock sizes were increased several times, as was the depth of water, to enable larger boats to use the system...

waterway. The final lock is Lower Lock, after which the navigation joins the Lee Navigation, just to the north of Feilde's Weir Lock. Wikimedia Commons...

restoring parts of the towpath between Paper Mill Lock and Badley Lock and concentrating their navigational restoration efforts on the 2.5 mile stretch of...

Lower Lock. 35 36 – No. 36 Drop Lock – Dalmuir Drop Lock (constructed recently to take navigation below bridge) 37 – Old Kilpatrick 38 – Dalnottar Lock No...

the size or the draft of the ship being contemplated for navigation and the seasonal water level. On others, it is quite objective, being caused by a...

first pound lock was built by the Thames Navigation Commission in 1773. The weir is some distance upstream of the lock between the lock island and Berkshire...

Southcote Lock is a lock on the Kennet Navigation at Southcote near the town of Reading in Berkshire, England. It has a rise/fall of 5 feet 3 inches (1...

to the shareholders in 1927. With the demise of navigation and the decay of the lock structures, water levels are considerably lower than they once were...

De Bohun Island (colloquially known as Lock Island). The Thames Navigation Commissioners built the original lock in 1778. Additional sluices north of View...

The Schuylkill Canal, or Schuylkill Navigation, was a system of interconnected canals and slack-water pools along the Schuylkill River in the U.S. state...

has the lock keeper's cabin and the weir pool, Teddington Lock Footbridge. The Navigation Act obtained in April 1771 by the Thames Navigation Commission...

Whitchurch Lock is a lock and weir on the River Thames in England. It is a pound lock, built by the Thames Navigation Commissioners in 1787. It is on an...

first pound lock was built by the Thames Navigation Commission in 1773. The weir consists of a series of iron watergates running from the lock to the Oxfordshire...

changes in ambient pressure Mechanisms with similar functions: Lock (water navigation) – Uses water levels instead of air Mantrap (access control) Revolving...

Hurley Lock is a lock and weir on the River Thames in England, situated in a clump of wooded islands close to the village of Hurley, Berkshire. The lock was...

A control lock, guard lock or stop lock differs from a normal canal lock in that its primary purpose is controlling variances in water level rather than...

Weybridge on the Wey Navigation had an additional single gate some 100 yards (91 m) below the lock, which when closed raises the water level above it, allowing...

first built in 1777 by the Thames Navigation Commissioners and the present lock dates from 1908. Despite its name, the lock is located in the Berkshire village...

section. A red band indicates that water levels are sufficiently high that the lock has been closed, and navigation on the river is unsafe. Map all coordinates...

halfway between the lock and the opposite bank, following the course of the Thames itself. The pound lock was built by the Thames Navigation Commission relatively...

The McClellan–Kerr Arkansas River Navigation System (MKARNS) is part of the United States inland waterway system originating at the Tulsa Port of Catoosa...

by the London Stone. The principle of lock/weir combination, which maintained the depth of water for navigation and reduced the danger of flooding, was...

reach the River Mersey at most states of the tide, as the water was deeper. The navigation was completely reconstructed between 1870 and 1900, with the...

Level Navigations used to be possible via the Old Bedford River and Welches Dam lock, but the Environment Agency piled the entrance to the lock in 2006...

There is also a lock marked on the river, though this was presumably a flash lock. Smeaton's plan for a sluice and navigation lock at Piddinghoe had...

List of largest dams List of tallest dams List of tidal barrages Lock (water navigation) – Device for raising and lowering boats or ships Reservoir safety –...