Plateau Archaeological Investigations conducted a cultural resource survey for two proposed wetland mitigation locations as part of the Mill Creek Road Improvement Project.
The pedestrian survey revealed a single debris pile. The pile consisted of approximately 50 aqua and clear glass insulators, metal brackets, and rusted metal piping within a large white wooden box. The debris is modern in origin and were noted, but not recorded.
Subsurface investigations were completed using a backhoe. Thirteen probes were excavated. Subsurface probes reached depths between 1.3 and 5.4 ft (0.4 and 1.7 m) below surface. One test probe contained two pieces of flat window glass and a single fragment of an aqua insulator. Due to the proximity of the historic debris pile and the presence of the aqua glass insulator fragment, it was determined these are associated with the historic debris pile.
Location: Walla Walla County, Washington