An Intensive Survey starts with the information acquired in a Reconnaissance Survey and adds a detailed architectural description, additional photographs and mapping, an integrity analysis, documentation of permitted and informal changes over time, a title search and site specific historical research on persons and events associated with the property. The documentation is evaluated against specific criteria to determine the property’s historical significance, often indicated by an OHP status code. This information can be part of a long-range planning exercise, result in compliance with environmental regulations, or further an interest in voluntary designation.