C&O Canal Walls Stabilization
McMullan provided a structural evaluation of both the dry stone and mortared walls at the C&O Canal Park in the historic Georgetown district of Washington, DC, along with a design for repairs. Many structural solutions were evaluated including grouting, earth anchors, reinforced concrete backup walls, sheet piling, and the dismantling/rebuilding of underpinning either in mortared walls or dry-laid stonewalls. In several cases, the dry-laid stone retaining walls supported the bearing walls of the early 18th and 19th century warehouses that were an integral part of the port of Georgetown. All restoration work complied with the State Historic Preservation Office and the Standards for Treatment of Historic Properties by the Secretary of the Interior.
National Park Service-National Capital Region