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...

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

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...

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

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,...

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...

Waterway System, and is used to control water diversion from Lake Michigan into the river and for navigation. The lock was built between 1936 and 1938 by the...

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...

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...

locks. The lowest lock was at Woodmill, where the navigation joined the estuary of the River Itchen, on its way to Southampton Water. The main wharves...

Airmyn. The section below Haddlesey is no longer part of the navigation, as a derelict lock blocks access to the lower river. Instead, the Selby Canal flows...

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

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...

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...

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 –...

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...

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...

Thames lock is used when Thames water level is low; it may have been added because the Thames was still slightly tidal at this point when the navigation was...

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...

Thirteen broads are generally open to navigation, with a further three having navigable channels. Some broads have navigation restrictions imposed on them in...

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...

the Avon Navigation. The Avon above Bath remains navigable as far as Bathampton where there is the remains of a flash lock. However, the lock past the...

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...

Sankey Canal in North West England, initially known as the Sankey Brook Navigation and later the St Helens Canal, is a former industrial canal, which when...

Cambridge via Whittlesey and Ely. The branch terminates, for navigation, at Stanground Lock, a connection to the Middle Levels, the drainage system of the...

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...

finance the construction of a new lock at Great Cornard, but a public inquiry to review new bylaws for the navigation proposed that the use of powered...

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...

Lock and Doncaster Town Lock are both located at the head of a canal section of the navigation, and are used to regulate water levels within those sections...

Pittsburgh. The lock and dam were built by the U.S. Army Corps of Engineers as a part of an extensive system of locks and dams to improve navigation along the...