The hundreds of ash trees that populate the grounds of the Gateway Arch will be coming down starting Friday. The Emerald Ash Borer is a threat to the 800 trees. The National Parks Service says the age of the trees and poor soil quality are also factors. The trees will be replaced with a variety of different species, including a large number of London Planes - a variety that is popular in many metropolitan areas like New York, San Francisco and Paris.
You can keep an eye on the day-to-day progress of the renovations being done on the Arch grounds. The CityArchRiver 2015 Foundation launched a webcam in March. An up-to-date view of the construction as well as past images and time-lapse videos can be checked out at the link: www.CityArchRiver.org