A Parks Department spokeswoman, Joelle Hammerstad, says people walking on top of the Pergola broke 17 glass planes. Each of the laminated panes has to be specially made at a cost of $800 or $900. In addition, she says climbers damaged copper flashing, which has to be replaced. And the whole thing will have to be spray-washed and painted to clean up graffiti.
Because it's an historic structure, the work has to be done to unique specifications.
The Pergola was originally built a century ago to cover an underground restroom. The whole structure was rebuilt after it was knocked down by a truck in 2001.