Panama Canal locks

The Panama Canal locks is a lock system that lifts a ship up 85 feet (26 metres) to the main elevation of the Panama Canal and down again. It has a total of six steps (three up, three down) for a ship's passage. The total length of the lock structures, including the approach walls, is over 1.9 miles (3 km). The locks were one of the greatest engineering works ever to be undertaken when they opened in 1914. No other concrete construction of comparable size was undertaken until the Hoover Dam, in the 1930s.

There are two independent transit lanes, since each lock is built double. The size of the locks limits the maximum size of ships that can transit the canal; this size is known as Panamax.

Construction on the Panama Canal expansion project began in September 2007. This will double the canal's capacity, allowing more and larger ships to use the canal. The project is expected to be completed in April 2016.

Design

There are twelve locks in total. A two-step flight at Miraflores, and a single flight at Pedro Miguel, lift ships from the Pacific up to Gatun Lake; then a triple flight at Gatun lowers them to the Atlantic side. All three sets of locks are paired; that is, there are two parallel flights of locks at each of the three lock sites. This, in principle, allows ships to pass in opposite directions simultaneously; however, large ships cannot cross safely at speed in the Culebra Cut, so in practice ships pass in one direction for a time, then in the other, using both "lanes" of the locks in one direction at a time.

Panama Canal

The Panamá Canal (Spanish: Canal de Panamá) is a 48-mile (77 km) ship canal in Panama that connects the Atlantic Ocean (via the Caribbean Sea) to the Pacific Ocean. The canal cuts across the Isthmus of Panama and is a key conduit for international maritime trade. There are locks at each end to lift ships up to Gatun Lake, an artificial lake created to reduce the amount of excavation work required for the canal, 26 metres (85 ft) above sea level. The current locks are 33.5 metres (110 ft) wide. A third, wider lane of locks is currently under construction and is due to open in 2016.

France began work on the canal in 1881, but had to stop because of engineering problems and high mortality due to disease. The United States took over the project in 1904, and took a decade to complete the canal, which was officially opened on August 15, 1914. One of the largest and most difficult engineering projects ever undertaken, the Panama Canal shortcut greatly reduced the time for ships to travel between the Atlantic and Pacific Oceans, enabling them to avoid the lengthy, hazardous Cape Horn route around the southernmost tip of South America via the Drake Passage or Strait of Magellan. The shorter, faster, and safer route to the U.S. West Coast and to nations in and around the Pacific Ocean allowed those places to become more integrated with the world economy.

Gatún

Gatun (Spanish: Gatún) is a small town on the Atlantic Side of the Panama Canal, located south of the city of Colón at the point in which Gatun Lake meets the channel to the Caribbean Sea. The town is best known as the site of the Panama Canal's Gatun Locks and Gatun Dam, built by the United States between 1906-1914.

Early history

The name “El Gatún” appears in Spanish colonial era maps as the name of a village and river, though its uncertain when exactly the area was populated or named. The village was located on the west bank of the Chagres River near its present-day location.

In 1671, the British pirate Henry Morgan and his men bivouacked close to Gatún after sacking and burning down the old Panama City.

In the mid-19th century, Gatún was described as a sleepy village of 40 or 50 cane huts, on the edge of a broad savannah. On a hill overlooking the river were ruins of an old Spanish fort.

The California Gold Rush of 1849 brought about dramatic changes to the isthmus of Panama, particularly to Gatún. All over Panama, rates for meals and lodging shot up overnight, fueled by increased demand and gold fever. Travelers going upriver on the Chagres stopped through Gatún, paying $2 a night for a hammock before proceeding on the often dangerous barge trip and overland mule ride to Panama City, from where they sailed on to San Francisco.

Locks

Locks may refer to

See also