Page "Mount Rushmore" Paragraph 5

Ten years of redevelopment work culminated with the completion of extensive visitor facilities and sidewalks in 1998, such as a Visitor Center, the Lincoln Borglum Museum, and the Presidential Trail.

Maintenance of the memorial requires mountain climbers to monitor and seal cracks annually.

Due to budget constraints, the memorial is not regularly cleaned to remove lichens.

However, on July 8, 2005, Alfred Kärcher GmbH, a German manufacturer of pressure washing and steam cleaning machines, conducted a free cleanup operation which lasted several weeks, using pressurized water at over.