The Jefferson Memorial honors Thomas Jefferson, principal author of the Declaration of Independence, a central force behind the American Revolution, founder of the Democratic-Republican Party, and the United States third president. Located in West Potomac Park on the shore of the Potomac River’s Tidal Basin, it is one of the most significant monuments in Washington D.C. It was created by an act of Congress in 1934 and designed by John Russel Pope, who also created the Archives and National Gallery buildings. The construction was completed in 1943.
EverGreene was engaged by the National Park Service to clean the marble dome and pediment roof as part of a comprehensive restoration. Modern laser cleaning technology and low volume steam was used to remove biological buildup and contamination. Conservators used a Nd:YAG 1064 nm Q-Switch laser for the contact-free removal of layers of residue and staining, not harming the historical marble surfaces of the dome, architrave, and pediment. The work was completed the Fall 2021.