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(Allegheny County, Pennsylvania)Tunnel on S. Tenth Street between Forbes Avenue and 2nd Avenue
(Marion County, Arkansas)Tunnel on the Missouri & Northern Arkansas Railroad (formerly Missouri Pacific) just northwest of Cotter
Housatonic Railroad Tunnel
(Fairfield County, Connecticut)A rock tunnel near the summit of the Housatonic RR grade at Hawleyville.
(Le Flore County, Oklahoma)Tunnel under Backbone Mountain on KCS Railway
NY&NE Railroad Tunnel
(Fairfield County, Connecticut)Abandoned tunnel built by the New York & New England RR; concrete lined by the New Haven RR in 1911.
Paw Paw Runnel
(Allegany County, Maryland)Chesapeake & Ohio Canal Tunnel
(Marion County, Arkansas)Tunnel on the Missouri and Northern Arkansas Railroad (formerly Missouri Pacific) southeast of Pyatt
Shepaug Railroad Tunnel
(Litchfield County, Connecticut)Abandoned tunnel of the Shepaug, Litchfield, and Northern RR
St. Clair River Tunnel
(St. Clair County, Michigan)Tunnel under St. Clair River on Canadian National Railroad in Port Huron