Slurry Wall construction was used in the construction of a five-level underground parking structure adjacent to a settlement-sensitive historic building. The slurry wall minimized ground disturbances and maintained groundwater levels in the soil supporting the building. Employed for both temporary and permanent excavation support, the slurry wall was designed as the permanent perimeter foundation wall of the parking structure. Geotechnical instrumentation was installed to monitor ground movements during excavating operations and construction. Groundwater levels were also monitored to evaluate the performance of the wall in minimizing groundwater drawdown in critical areas. The instrumentation data confirmed that the wall performed as intended; it successfully supported the excavation and new building without disturbing the historic structure.

Provides guidance to historic building owners and building managers, preservation consultants, architects, contractors, and project reviewers prior to treatment of historic buildings.

Explains the purpose of historic structure reports, describes their value to the preservation of significant historic properties, outlines how reports are commissioned and prepared, and recommends an organizational format for such reports.

The Interior Dept. is responsible for establishing professional standards & providing advice on the preservation & protection of all cultural resources listed in or eligible for listing in the National Register of Historic Places. These Standards are intended to be applied to a wide variety of resource types, including buildings, sites, structures, objects, & districts. The Standards are neither technical nor prescriptive, but are intended to promote responsible preservation practices. Covers: exterior building materials & features; interior building systems, spaces, & finishes; building sites; settings. Photos.