National Historic Preservation Act documents:Portsmouth Site Historic Era Architectural and Archaeological Surveys/Reports HISTORIC ERA - Phase II Archaeological Site Evaluation Report for Five Sites at Portsmouth Gaseous Diffusion Plant HISTORIC ERA - Phase II Archaeological Evaluation Report for Six Historic Farmstead Sites At The Portsmouth Gaseous Diffusion Plant HISTORIC ERA - Phase II Site Evaluations of 33PK212 and 33PK213 for the Portsmouth Gaseous Diffusion Facility HISTORIC ERA - Geophysical Survey at the Holt Cemetery, Pike County, Ohio HISTORIC ERA - Phase I Archaeological Survey of the Portsmouth Gaseous Diffusion Plant Preliminary Reconnaissance Survey of Fifteen Historic-Era Structure Locations within the Portsmouth Gaseous Diffusion Plant (PORTS), Pike County, Ohio - Summary Report for Preliminary Assessment of 12 Historic Archaeological Sites at the PORTS Plant, Piketon, Ohio - Phase I Archaeological Reconnaissance of Selected Historical Sites at the PORTS Facility, Pike County, Ohio HISTORIC ERA - Phase I Archaeological Survey of Sites 33PK322, 33PK323, and 33PK324 at the Portsmouth Gaseous Diffusion Plant HISTORIC ERA - Phase I Cultural Resource Investigation of Selected Historical Sites at the Portsmouth Gaseous Diffusion Plant HISTORIC ERA - Phase I-Level Documentation of Four Historic-Era Farmstead Sites Within the Portsmouth Gaseous Diffusion Plant HISTORIC ERA - Summary Report of Historic-Era Archaeological Resources within the Portsmouth Gaseous Diffusion Plant
HISTORIC ERA - Phase II Archaeological Site Evaluation Report for Five Sites at Portsmouth Gaseous Diffusion Plant
HISTORIC ERA - Phase II Archaeological Evaluation Report for Six Historic Farmstead Sites At The Portsmouth Gaseous Diffusion Plant
HISTORIC ERA - Phase II Site Evaluations of 33PK212 and 33PK213 for the Portsmouth Gaseous Diffusion Facility
Preliminary Reconnaissance Survey of Fifteen Historic-Era Structure Locations within the Portsmouth Gaseous Diffusion Plant (PORTS), Pike County, Ohio - Summary Report for Preliminary Assessment of 12 Historic Archaeological Sites at the PORTS Plant, Piketon, Ohio - Phase I Archaeological Reconnaissance of Selected Historical Sites at the PORTS Facility, Pike County, Ohio
HISTORIC ERA - Phase I Archaeological Survey of Sites 33PK322, 33PK323, and 33PK324 at the Portsmouth Gaseous Diffusion Plant
HISTORIC ERA - Phase I Cultural Resource Investigation of Selected Historical Sites at the Portsmouth Gaseous Diffusion Plant
HISTORIC ERA - Phase I-Level Documentation of Four Historic-Era Farmstead Sites Within the Portsmouth Gaseous Diffusion Plant
HISTORIC ERA - Summary Report of Historic-Era Archaeological Resources within the Portsmouth Gaseous Diffusion Plant