Complex sentence: One of the new yards were to be constructed in Baltimore, Maryland by the Bethlehem Steel Corporation and known as the Bethlehem-Fairfield shipyard for the Fairfield neighborhood in Baltimore it was located.
Split into simpler sentences: One of the new yards planned for construction was to be in Baltimore, Maryland by the Bethlehem Steel Corporation. That facility became known as the Bethlehem-Fairfield shipyard for the Fairfield section of Baltimore where it was located.