Working out Investigations

My Investigation is the the St.Louis Arch. The people in my group are Jasmine, Jamaal,Adrian and Anjanae we all are working together to find out more knowelgde about the St.Louis Arch.What me and my group are trying to find out is how the arch is made, when it was made, how long it took to be made and a lot of other questions. In the end we want ot know how does the St.Louis Arch stand up to all the different types of weather?