On This Date In History

On July 7, 1930, construction of the Hoover Dam begins. Over the next five years, a total of 21,000 men would work ceaselessly to produce what would be the largest dam of its time, as well as one of the largest manmade structures in the world.
Although the dam would take only five years to build, its construction was nearly 30 years in the making. Arthur Powell Davis, an engineer from the Bureau of Reclamation, originally had his vision for the Hoover Dam back in 1902, and his engineering report on the topic became the guiding document when plans were finally made to begin the dam in 1922.
Herbert Hoover, the 31st president of the United States and a committed conservationist, played a crucial role in making Davis’ vision a reality. As secretary of commerce in 1921, Hoover devoted himself to the erection of a high dam in Boulder Canyon, Colorado. The dam would provide essential flood control, which would prevent damage to downstream farming communities that suffered each year when snow from the Rocky Mountains melted and joined the Colorado River. Further, the dam would allow the expansion of irrigated farming in the desert, and would provide a dependable supply of water for Los Angeles and other southern California communities.
Even with Hoover’s exuberant backing and a regional consensus around the need to build the dam, Congressional approval and individual state cooperation were slow in coming. For many years, water rights had been a source of contention among the western states that had claims on the Colorado River. To address this issue, Hoover negotiated the Colorado River Compact, which broke the river basin into two regions with the water divided between them. Hoover then had to introduce and re-introduce the bill to build the dam several times over the next few years before the House and Senate finally approved the bill in 1928.
In 1929, Hoover, now president, signed the Colorado River Compact into law, claiming it was “the most extensive action ever taken by a group of states under the provisions of the Constitution permitting compacts between states.”
Once preparations were made, the Hoover Dam’s construction sprinted forward: The contractors finished their work two years ahead of schedule and millions of dollars under budget. Today, the Hoover Dam is the second highest dam in the country and the 18th highest in the world. It generates enough energy each year to serve over a million people, and stands, in Hoover Dam artist Oskar Hansen’s words, as “a monument to collective genius exerting itself in community efforts around a common need or ideal.”

 

On July 7, 1976, for the first time in history, women are enrolled into the United States Military Academy at West Point, New York. On May 28, 1980, 62 of these female cadets graduated and were commissioned as second lieutenants.
The United States Military Academy, the first military school in America, was founded by Congress in 1802 for the purpose of educating and training young men in the theory and practice of military science. Established at West Point, New York, the U.S. Military Academy is often simply known as West Point.
Located on the high west bank of New York’s Hudson River, West Point was the site of a Revolutionary-era fort built to protect the Hudson River Valley from British attack. In 1780, Patriot General Benedict Arnold, the commander of the fort, agreed to surrender West Point to the British in exchange for 6,000 English pounds. However, the plot was uncovered before it fell into British hands, and Arnold fled to the British for protection.
Ten years after the establishment of the U.S. Military Academy in 1802, the growing threat of another war with Great Britain resulted in Congressional action to expand the academy’s facilities and increase the West Point corps. Beginning in 1817, the U.S. Military Academy was reorganized by superintendent Sylvanus Thayer, later known as the “father of West Point”, and the school became one of the nation’s finest sources of civil engineers. During the Mexican-American War, West Point graduates filled the leading ranks of the victorious U.S. forces, and with the outbreak of the Civil War former West Point classmates regretfully lined up against one another in the defense of their native states.
In 1870, the first African American cadet was admitted into the U.S. Military Academy, and in 1976, the first female cadets. The academy is now under the general direction and supervision of the department of the U.S. Army and has an enrollment of more than 4,000 students.

 

Andrea Hollen, the first female cadet to graduate from West Point. 1980.

On July 7, 1969, a battalion of the U.S. 9th Infantry Division leaves Saigon in the initial withdrawal of U.S. troops. The 814 soldiers were the first of 25,000 troops that were withdrawn in the first stage of the U.S. disengagement from the war. There would be 14 more increments in the withdrawal, but the last U.S. troops did not leave until after the Paris Peace Accords were signed in January 1973.

 On July 7, 1865, Mary Surratt is executed by the U.S. government for her role as a conspirator in Abraham Lincoln’s assassination.
Surratt, who owned a tavern in Surrattsville (now Clinton), Maryland, had to convert her row house in Washington, D.C., into a boardinghouse as a result of financial difficulties. Located a few blocks from Ford’s Theatre, where Lincoln was murdered, this house served as the place where a group of Confederate supporters, including John Wilkes Booth, conspired to assassinate the president. It was Surratt’s association with Booth that ultimately led to her conviction, though debate continues as to the extent of her involvement and whether it really warranted so harsh a sentence.
On the day of the assassination, Booth asked Surratt to deliver a package, which was later discovered to contain firearms, to her old tavern in Maryland. On her way home, Surratt ran into John Lloyd, a former Washington police officer who currently leased the tavern. When authorities first questioned Lloyd about their encounter, he did not mention anything significant and denied that Booth and David Herold had visited his tavern. Yet when questioned later, he claimed that Surratt had told him to have whiskey and weapons ready for Booth and Herold, who would be stopping by that night.
Louis Weichmann, one of the alleged conspirators who delivered the package with Surratt, was released after he testified against her. He later claimed that the government had forced him to testify, and that it plagued his conscience for the rest of his life. Furthermore, Lewis Powell, a conspirator who was hanged with Surratt, proclaimed her innocence to his executioner minutes before his death.
Many expected President Andrew Johnson to pardon Surratt because the U.S. government had never hanged a woman. The execution was delayed until the afternoon, and soldiers were stationed on every block between the White House and Fort McNair, the execution site, to relay the expected pardon. But the order never came.

 

On July 7, 1928, Otto Frederick Rohwedder from Davenport, Iowa, invented the first bread-slicing machine which cut one whole loaf at a time. He began design of a bread slicer in 1912 but the factory that contained both the blueprints and the original prototype of his bread slicer was destroyed in a fire. The next fully working machine by Rohwedder was ready in 1928. Chillicothe Baking Company of Chillicothe, Missouri, was the first bakery to make commercial use of the machine.