Construction of Mount Rushmore

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Gutzon Borglum, the sculptor of the memorial.

The construction of Mount Rushmore National Memorial took about 14 years, from 1927 to 1941.

Designing the monument

Doane Robinson of the South Dakota Historical Society wanted a monument in South Dakota to be built in order to help the economy of the state by attracting tourism. In 1923, he proposed that this monument should be built from the granite cliffs in the Black Hills of South Dakota. Senator Peter Norbeck of South Dakota approved of the proposal, and federal funds helped the project. Robinson asked architect and sculptor Gutzon Borglum to sculpt and design the monument. Borglum decided to use Mount Rushmore for the sculpture, since it appeared the easiest of the cliffs to work on.

Gutzon Borglum, having decided on the location of the sculpture, decided to make this monument to four Presidents of the United States. He chose the two most famous Presidents in history, George Washington and Abraham Lincoln. He chose Thomas Jefferson because Jefferson nearly doubled the size of the United States in the 1803 Louisiana Purchase. The last President Borglum chose was Theodore Roosevelt, suggested by President Calvin Coolidge because of Theodore Roosevelt's introduction of the National Park Service.

Borglum worked on his design of the four Presidents in his studio in Stone Mountain, Georgia. He invented a machine that would scale the model at 1 inch on his model to 1 foot on Mount Rushmore. The original design had the Presidents head to waist, but due to high costs, only the heads were completed.

Construction

Workers used harnesses attached to steel cables while sculpting.

A few hundred workers, who were usually miners, sculptors, or rock climbers, used dynamite, jackhammering, and chiseling to sculpt the model from the mountain. A stairway had to be constructed to the top of the mountain first, where cables would be suspended, in which the workers would be in a harness while working.

The eyes would be sculpted as holes, but a cube of granite would remain in the pupil to provide a reflection of light to make the appearance of the eyes more realistic.

Construction began on August 10, 1927.

George Washington

George Washington's head was started first. Due to the economic instability of the United States caused by the Great Depression, it was completed in seven years, and dedicated to the public on Independence Day 1934. A large American flag was placed over Washington's head before the reveal, and this became a tradition for each of the President's heads.

Thomas Jefferson

Thomas Jefferson's head was started next, on Washington's right. Before the head was complete, Borglum ordered that it be blasted off due to poor rock quality. Jefferson's head was started again to the left of Washington. Jefferson's head was dedicated in 1936.

Abraham Lincoln

Abraham Lincoln's head was more of a challenge because of his beard, but his head was completed on the far right of the cliff, dedicated on September 17, 1937, the 150th anniversary of the signing of the Constitution of the United States in 1787.

Theodore Roosevelt

While Theodore Roosevelt's head was being constructed, acquaintances for tourists were being built, including plumbing, lighting, and a visitor center. On July 2, 1939, Roosevelt's head was dedicated.

Hall of Records

Due to unforeseen vulnerabilities in the granite, Lincoln and Jefferson were moved from the locations in Borglum's original design. Lincoln was relocated to the spot that Borglum had planned to include an 80 by 100 foot inscription in the shape of the Louisiana Purchase.

To replace the inscription, Borglum conceived another grand addition to the monument of similar proportions: the Hall of Records. The Hall of Records was to include a grand entrance to an 80 by 100 foot vault carved directly into the granite face of the small canyon behind Lincoln’s head. Borglum envisioned 800 granite steps leading from his studio to the entrance to the entrance of the Hall.

In 1938 Borglum and his crew began to carve this grand hall, where he envisioned the original Declaration of Independence and United States Constitution should eventually be stored. But a combination of unexpectedly hard granite, looming war in Europe, and lack of funding conspired against Borglum’s last dream, though his plans became more elaborate as his team rushed to complete this work. They reached 70 feet into the granite by the time Borglum unexpectedly died in March of 1941. The monument was deemed complete and all work shutdown on October 31 of the same year. Though Borglum’s children tried over the years to renew interest in their father’s last dream, it was not until 1998 that the National Park System, together with the Borglum Family, put “finishing touches” on the Hall of Records. A titanium vault was installed in the granite floor of the unfinished hall, and filled with sixteen porcelain enamel panels that include the United States Constitution and other important historical documents. The Hall of Records entrance can be seen from west-facing aerial photographs of the monument from Live Search Maps.

Present day

The granite remains from the construction of Mount Rushmore are still visible below the heads of the Presidents.

Since the excess granite remains that were dropped to the ground from dynamite explosions and chiseling were nearly impossible to remove, they were left as part of the site. The monument has received much criticism from the Native Americans in the Black Hills area, but Doane Robinson's original vision of boosting the South Dakotan economy was a success, as the site receives millions of visitors.