The behemoth platform built by the Park Board lasted for decades. Really a surprisingly long time.
Here’s a snapshot dated June 30, 1922 of the top of Minnehaha Falls:
Category: 20th Century
Meanwhile, in 1958
Some early stone retaining walls are shown in this picture of the first landing on the south side of the Minnehaha gorge.
This landing was rebuilt sometime after 1958. The flooding shown may be from recent heavy rains, or it might be an unsolved groundwater engineering problem.