The Great Argo Project narrates the compelling history of the Argo Tunnel and Argo Mill as well as the biography of Samuel Newhouse who pioneered the project. The author explains in detail the construction of the 4-mile Argo Tunnel at Idaho Springs, Colorado, dug to access and drain mines in the Central City gold district. It discusses the underpinning need and impetus for the tunnel and illustrates how the tunnel was dug over a period of 17 years...