Lock (water navigation)

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. The distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself (usually then called a caisson) that rises and falls.

Locks are used to make a river more easily navigable, or to allow a canal to take a reasonably direct line across land that is not level.

Pound lock

A pound lock is a type of lock that is used almost exclusively nowadays on canals and rivers. A pound lock has a chamber (the pound) with gates at both ends that control the level of water in the pound. In contrast, an earlier design with a single gate was known as a flash lock.

Pound locks were first used in medieval China during the Song Dynasty (9601279 AD), having been pioneered by the government official and engineer Qiao Weiyue in 984. They replaced earlier double slipways that had caused trouble and are mentioned by the Chinese polymath Shen Kuo (10311095) in his book Dream Pool Essays (published in 1088), and fully described in the Chinese historical text Song Shi (compiled in 1345):

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Latest News for: canal lock

Sheffield canal lock gates replaced in 10-week process

BBC News 23 Mar 2025
Experts have completed a painstaking 10-week process to replace two sets of lock gates on the Sheffield and Tinsley Canal ... Flight Lock, where the canal meets the River Don.

Woman bites off husband’s tongue during domestic dispute in Rajasthan, then attempts suicide

Gulf News 22 Mar 2025
Dubai ... Also ReadAlso Read. India ... Also Read ... India. Father pushes children into canal in Andhra Pradesh; daughter dies, son survives. Following the incident, Ravina locked herself in a room and attempted to harm herself by slitting her wrist with a sickle.

Debt-ridden father throws kids into canal, surrenders to police

The Times of India 19 Mar 2025
On March 17, he picked them up from school, bought them chocolates and cakes, and then took them to the Godavari canal locks at Nelaparthi Padu ... He first threw Sandeep into the canal.

Soo Locks will open early for 2025. How to watch traffic online in Michigan

Holland Sentinel 19 Mar 2025
The Soo Locks in Sault Ste ... The Poe Lock will open at 8 a.m ... The locks have been closed since Jan 16 ... Marie, Michigan, consist of two canals and four locks that allow vessels of many types/sizes to traverse the 21-foot drop in elevation of the St.

3 Ohio cities among best places in US to see cherry blossoms this spring. Here's where

Record-Courier 19 Mar 2025
In Akron, you can view cherry blossoms ("sakura" in Japanese) along the Towpath Trail between Lock 3 downtown and Channelwood Village on Thornton Street, according to the Ohio Office of Tourism.

Girl dies after debt-ridden father throws kids into canal; her brother survives

The Times of India 18 Mar 2025
In a shocking incident, a father threw his son and daughter into a canal in an attempt to kill them ... When they reached the Godavari canal locks at Nelaparthipadu, he stopped his bike and told them they were going to commit suicide.

Ohio is releasing 85,000 rainbow trout in area lakes and ponds. Find out where and when

Canton Repository 17 Mar 2025
VIDEO. 2025 rainbow trout stocking at Noccalula Falls. More than 1,500 rainbow trout were added to the gorge at Noccalula Falls on Jan. 13, 2025 ... March 31Lock #4 Park in Canal Fulton. April 26 ... $599.04 ... April 26Ohio Canal Lock #4 ... May 3Ohio/Erie Canal.

US military asked to draw up options for increasing presence at Panama Canal

Philenews 14 Mar 2025
This follows President Donald Trump’s recent statement about “reclaiming” the Panama Canal ... vessels through the canal ... Potentially involving the Army Corps of Engineers in canal lock operations.

Trump 'orders US military to draw up plans to seize Panama Canal' | Daily Mail Online

The Daily Mail 14 Mar 2025
... of the canal in 1999 ... Holsey is pictured with Panama Canal administrator Ricaurte Vasquez (left) during a tour of the canal's facilities at the Miraflores Locks near Panama City, on February 20, 2025.

Tom Moran: Are we still the good guys? Trump is trashing that legacy.

Penn Live 13 Mar 2025
So, what is happening now? How did we get from where we were, to where we are today, with a blustering president vowing to take Greenland from Denmark, seize the Panama Canal and make Canada a 51st state — whether they like it or not?.

Today in History: March 9, 1905 - Blind pigs sentenced, Nest of robbers & Panama ...

Grand Forks Herald 09 Mar 2025
PANAMA CANAL WILL COST $230,000,000. PANAMA CANAL ENGINEERING COMMITTEE MAKES ITS FIRST REPORT ... to twelve years—objections raised to a lock-based system ... FROM PANAMA CANAL STORY HERE BEING ADVERTISED.

Diver who found car believed to belong to missing Martin family still optimistic, despite partial recovery

The Oregonian 09 Mar 2025
On the Oregon side of the river that stretched below them, a salvage crane’s cable began to slither upwards out of the depths of the Cascade Locks canal around 3.45 p.m., carrying a remnant of the ...

'You have 30 days to leave': Panama releases dozens of detained US deportees from jungle camp

The Times of India 09 Mar 2025
The deportees were locked up in a hotel in Panama and the photos of them holding up notes from their windows pleading for help and saying that they were scared to return to their own countries caused humanitarian concerns.

Oregon family’s mysterious disappearance nearly 70 years ago may soon have answers as divers pull ...

New York Post 09 Mar 2025
In time, in the Cascade Locks canal, he came across a large section of the river bottom that was filled with debris. He recognized the section as a massive pit left from the canal’s construction ...

SLBC tunnel collapse: Rs 25 lakh ex-gratia for family of victim

The Siasat Daily 09 Mar 2025
On February 22, a portion of the Srisailam Left Bank Canal (SLBC) tunnel in Nagarkurnool collapsed, locking eight workers, including two engineers, inside the debris and slush.
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