Phase III Mitigation of Adverse Effect

This level of archaeological investigation is employed when the historic property has been determined to be eligible for inclusion into the National Register of Historic Places and there is an adverse effect to the historic property by a project. Before this mitigation takes place a research design is carefully prepared and systematic archaeological methods and techniques are employed to accurately and efficiently retrieve scientific data during the excavation process. Due to the fact that most historic properties are very large, this usually requires a combination of hand and machine assisted excavation. However, not every site reaches the data recovery stage. Consultants, agencies and the SHPO may propose other solutions. This is the least frequently performed level of archaeological investigation.