The Seattle Space Needle wants to add three viewing platforms extending out from the observation deck.
They would have glass walls and a glass floor so people could look straight down.
The Seattle Daily Journal of Commerce reports the Landmarks Preservation Board is expected to decide next week whether to give its approval.
About 1.5 million people visit the Space Needle each year.
Information from: Seattle Daily Journal of Commerce, http://www.djc.com/
This story originally appeared on Oregon Public Broadcasting.