Clarksville had two railroads.  The Rock Island went north and south and is now the Iowa Northern.  The Chicago Great Western had a line going east and west, and it is now the Rolling Prairie Trail.  
Bridges
 
 
Subdivided Warren Through Truss Bridge over Shell Rock River
Clarksville Trail Bridge
 
 
Deck Girder Bridge over Shell Rock River
IANR Clarksville Millrace Bridge
 
 
Deck Plate Girder Bridge over Clarksville Millrace
IANR Flood Creek Bridge
 
 
Deck Plate Girder Bridge over Flood Creek
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