From my father Weldon's pictures taken in 1962 here is the Argo Tunnel in Idaho Springs. When I began to digitize my father's collection about six years ago, I found it interesting that he took pictures of the area that I had been modeling. I built a model of the chutes following Harry Brunk's plans about 1984 and took a trip to Colorado in 1985. Sadly the chutes had been torn down not long before.
Jim
Jim Curran