PLSO Oregon Surveyor July/August 2020

27 Professional Land Surveyors of Oregon  |  www.plso.org The Lost Surveyor Photo 5: The T-14 benchmark. Photo 3: Two blocks from Lownsdale Square is the United States Geological Survey Benchmark T-14, set vertically in the base of the granite pillar on the west face of City Hall on SW 5th Avenue. Photo 4: City Hall’s granite pillar, the location of USGS Benchmark T-14.