Black and white photograph. Chicago Milwauke St Paul & Pacific Railroad Company Tower, at E-266 (Groton), SD, looking East, from the R.C. Lathrop Collection, built 1911, This tower was the manual interlocking plant for the CNW Interlocking at Groton. Man in tower handled signals & switches.
Groton, SD -- Photograph -- History -- Railroad
Alexander Mitchell Public Library
Beulah Williams Library Archives and Special Collections
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