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Triad-Day Mountain Bridge, Spanning Park Loop Road at Triad-Day Mountain Pass, Seal Harbor, Hancock County, ME
Photo Caption Pages
Spanning Park Loop Road at Triad-Day Mountain Pass, Seal Harbor vicinity, ME
Find maps of Seal Harbor, ME
Documentation compiled after 1968.
Survey number HAER ME-46
Unprocessed field note material exists for this structure (N350).
Building/structure dates: 1941 initial construction
Significance: This structure provides a grade separation between the Park Loop Road and the Day Mountain Carriage Road, allowing carriage road users to cross the busy park motor road in safety. The stone-faced reinforced concrete structure is typical of bridges employed in the late 1930s extension of the Park Loop Road.
Concrete Arch Bridges
W H Hinman, Inc
Rockefeller, John D.
Spelman, H. J.
Vint, Thomas C.
Quin, Richard H., Historian
Historic American Engineering Record (Library of Congress)
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