The National Park Service has begun a 15-month project to restore the roofs, repair the stone, and clean the marble at the Thomas Jefferson Memorial. The memorial will remain open for the duration of the project, although some areas will be inaccessible.
The National Park Service has concluded a successful test using laser ablation as a means of removing biofilm that has darkened the dome of the Thomas Jefferson Memorial. The test paves the way to ultimately clean the rest of the memorial.
The National Park Service is preparing to begin a test of an experimental laser removal treatment of the biofilm affecting the Thomas Jefferson Memorial, most evident on the dome.
