(Back to TOP:jpn)        (Back to TOP:eng)
                     Image result for ロイター Image result for writer Image result for wikipediaImage result for writerImage result for writer         
                 Image result for usa calendar, national holidays, august 2019

?@ ! # $ % - _ "" & ~ 【】[]「」{} () ~ 『』() <>  ,

"On August 15, 1914, the U.S.-built Panama Canal opens two years ahead of schedule."
            "Panama Canal-HISTORY"     "Panama Canal-Wikipedia "
Panama Canal construction-Images"   
                      (The 105-20-line-photo-attached/498.77KB-24.9KB/Line)  

On This Day in American History
On August 15, 1914, the U.S.-built Panama Canal opens two years ahead of schedule. The quest to connect the Atlantic and Pacific oceans dates back to the mid-1800s, when thousands of Americans rushed to California and Oregon in search of gold. In 1855, the U.S. built a railroad across Panama, which was then part of Colombia, but it did not have the capacity that a canal would. In 1881 a French entrepreneur began construction of a canal, but the company soon went bankrupt. Just after the turn of the century, the U.S. signed an agreement to lease the land designated for the canal. After developing the construction infrastructure, proper construction of the actual canal began in 1909. The total cost was estimated to be $500,000,000, which would be over $9 billion in today’s dollars. In 1977, President Jimmy Carter negotiated to return the canal to Panama on December 31, 1999.
    Image result for August 15, 1914Image result for panama canalImage result for builtImage result for by wordImage result for usa  
    Image result for openedImage result for two yearsImage result for ahead of scheduleImage result for opening ceremony of the U.S.-built Panama Canal  Image result for 1914, the U.S.-built Panama CanalImage result for panama canalImage result for panama canal
  Image result for questImage result for connectionImage result for the Atlantic and Pacific oceansImage result for the Atlantic and Pacific oceansImage result for dateImage result for midImage result for 1800Image result for back word
  Image result for thousands of Americans rushed to California and Oregon in search of gold.Image result for gold rushImage result for thousands of Americans rushed to California and Oregon in search of gold.Image result for thousands of Americans rushed to California and Oregon in search of gold. 
 Image result for 1855Image result for the U.S. built a railroad across PanamaImage result for part of ColombiaImage result for part of Colombia
  Image result for howeverImage result for no wordImage result for enough wordImage result for capacity wordImage result for canal wordImage result for would word
  Image result for 1881Image result for frenchImage result for entrepreneurImage result for beganImage result for construction wordImage result for howeverImage result for soonImage result for went bankrupt
  Image result for just wordImage result for after wordImage result for the turn of the century,Image result for turn of centuryImage result for the U.S.Image result for signedImage result for agreement word
   Image result for lease the landImage result for designatedImage result for forImage result for for the canalImage result for After wordImage result for developing word  
  Image result for construction infrastructure wordImage result for proper constructionImage result for the actual canal began in 1909Image result for actualImage result for construction wordImage result for beganImage result for 1909
          Image result for The total costImage result for estimated wordImage result for $500,000,000Image result for todayImage result for $ 9 billion
  Image result for 1977Image result for 977, President Jimmy Carter negotiated to return the canal to Panama on December 31, 1999.Image result for negotiatedImage result for In 1977, President Jimmy Carter negotiated to return the canal to Panama on December 31, 1999.Image result for returnImage result for December 31, 1999

  Image result for wikipediaPanama Canal Map EN.png
  Panorama of Pacific entrance of the canal.
                                "Panama Canal-HISTORY"

Following the failure of a French construction team in the 1880s, the United States commenced building a canal across a 50-mile stretch of the Panama isthmus in 1904. The project was helped by the elimination of disease-carrying mosquitoes, while chief engineer John Stevens devised innovative techniques and spurred the crucial redesign from a sea-level to a lock canal. His successor, Lt. Col. George Washington Goethals, stepped up excavation efforts of a stubborn mountain range and oversaw the building of the dams and locks. Opened in 1914, oversight of the world-famous Panama Canal was transferred from the U.S. to Panama in 1999.

There were earlier, failed attempts to build a shortcut from Europe to Asia

The idea of creating a water passage across the isthmus of Panama to link the Atlantic and Pacific Oceans dates back to at least the 1500s, when King Charles I of Spain tapped his regional governor to survey a route along the Chagres River. The realization of such a route across the mountainous, jungle terrain was deemed impossible at the time, although the idea remained tantalizing as a potential shortcut from Europe to eastern Asia.

France was ultimately the first country to attempt the task. Led by Count Ferdinand de Lesseps, the builder of the Suez Canal in Egypt, the construction team broke ground on a planned sea-level canal in 1880. The French soon comprehended the monumental challenge ahead of them: Along with the incessant rains that caused heavy landslides, there was no effective means for combating the spread of yellow fever and malaria. De Lesseps belatedly realized that a sea-level canal was too difficult and reorganized efforts toward a lock canal, but funding was pulled from the project in 1888.

Following the deliberations of the U.S. Isthmian Canal Commission and a push from President Theodore Roosevelt, the U.S. purchased the French assets in the canal zone for $40 million in 1902. When a proposed treaty over rights to build in what was then a Colombian territory was rejected, the U.S. threw its military weight behind a Panamanian independence movement, eventually negotiating a deal with the new government in 1903 that gave them rights in perpetuity to the canal zone.

Seemingly not grasping the lessons from the French effort, the Americans devised plans for a sea-level canal along the roughly 50-mile stretch from Colón to Panama City. The project officially commenced with a dedication ceremony on May 4, 1904, but chief engineer John Wallace encountered immediate problems. Much of the French equipment was in need of repair, while the spread of yellow fever and malaria was frightening off the workforce. Under pressure to keep construction moving forward, Wallace instead resigned after a year.

The right equipment and plan finally move the Panama Canal ahead.

A railroad specialist named John Stevens took over as chief engineer in July 1905 and immediately addressed the workforce issues by recruiting West Indian laborers. Stevens ordered new equipment and devised efficient methods to speed up work, such as the use of a swinging boom to lift chunks of railroad track and adjust the train route for carting away excavated material. He also quickly recognized the difficulties posed by landslides and convinced Roosevelt that a lock canal was best for the terrain.

The project was helped immensely by chief sanitary officer Dr. William Gorgas, who believed that mosquitoes carried the deadly diseases indigenous to the area. Gorgas embarked on a mission to wipe out the carriers, his team painstakingly fumigating homes and cleansing pools of water. The last reported case of yellow fever on the isthmus came in November 1905, while malaria cases dropped precipitously over the following decade.

Although construction was on track when President Roosevelt visited the area in November 1906, the project suffered a setback when Stevens suddenly resigned a few months later. Incensed, Roosevelt named Army Corps engineer Lt. Col. George Washington Goethals the new chief engineer, granting him authority over virtually all administrative matters in the building zone. Goethals proved a no-nonsense commander by squashing a work strike after taking charge, but he also oversaw the addition of facilities to improve the quality of life for workers and their families.

Goethals focused efforts on Culebra Cut, the clearing of the mountain range between Gamboa and Pedro Miguel. Excavation of the nearly 9-mile stretch became an around-the-clock operation, with up to 6,000 men contributing at any one time. Despite the attention paid to this phase of the project, Culebra Cut was a notorious danger zone, as casualties mounted from unpredictable landslides and dynamite explosions.

Construction of the locks began with the pouring of concrete at Gatún in August 1909. Built in pairs, with each chamber measuring 110 feet wide by 1,000 feet long, the locks were embedded with culverts that leveraged gravity to raise and lower water levels. Ultimately, the three locks along the canal route lifted ships 85 feet above sea level, to man-made Gatún Lake in the middle. Hollow, buoyant lock gates were also built, varying in height from 47 to 82 feet. The entire enterprise was powered by electricity and run through a control board.

A costly and deadly project finally yields a vital canal.

The grand project began drawing to a close in 1913. Two steam shovels working from opposite directions met in the center of Culebra Cut in May, and a few weeks later, the last spillway at Gatún Dam was closed to allow the lake to swell to its full height. In October, President Woodrow Wilson operated a telegraph at the White House that triggered the explosion of Gamboa dike, flooding the final stretch of dry passageway at Culebra Cut.

The Panama Canal officially opened on August 15, 1914, although the planned grand ceremony was downgraded due to the outbreak of WWI. Completed at a cost of more than $350 million, it was the most expensive construction project in U.S. history to that point. Altogether, some 3.4 million cubic meters of concrete went into building the locks, and nearly 240 million cubic yards of rock and dirt were excavated during the American construction phase. Of the 56,000 workers employed between 1904 and 1913, roughly 5,600 were reported killed.

Bolstered by the addition of Madden Dam in 1935, the Panama Canal proved a vital component to expanding global trade routes in the 20th century. The transition to local oversight began with a 1977 treaty signed by U.S. President Jimmy Carter and Panama leader Omar Torrijos, with the Panama Canal Authority assuming full control on December 31, 1999. Recognized by the American Society of Civil Engineers as one of the seven wonders of the modern world in 1994, the canal hosted its 1 millionth passing ship in September 2010.

                      (Back to TOP:jpn)        (Back to TOP:eng)