They planned further development of the route to the east , but this required that the bridge over the Michigammes River be replaced .
Also in 1913 , the Iron County Road Commission began the development of a trunk line route through Crystal Falls and into Mansfield .
Iron County Road Commission planned further development of the route to the east , but this required that the bridge over the Michigammes River be replaced .
Also in 1913 , the Iron County Road Commission began the development of a trunk line route through Crystal Falls and into Mansfield .