Benchmark C9, near Apollinaris Spring in Yellowstone National Park
Detailed Description
Benchmark C9, installed by the US Coast and Geodetic Survey (now the National Geodetic Survey) in 1923 near Apollinaris Spring in Yellowstone National Park. The number stamped into the mark, “7337.580,” is the elevation in feet that was determined by surveys the year the benchmark was established. USGS photo by Michael Poland, September 4, 2024.
Sources/Usage
Public Domain.