Replica of USGS Benchmark located at the Hawaii Volcanoes National Park. Approximately 1" diameter.
Described BY the Coast and Geodetic Survey in 1949:
"STATION IS LOCATED ABOUT 100 YARDS NORTHWEST OF THE VOLCANO HOUSE HOTEL, ABOUT 200 YARDS WEST OF THE HAWAIIAN NATIONAL PARK HEADQUARTERS, ABOUT 150 YARDS SOUTH OF A NUMBER OF LARGE WOODEN WATER TANKS, 22 FEET SOUTHWEST OF THE CENTERLINE OF THE HIGHWAY WHICH RUNS BETWEEN HILO AND NAALEHU, 10 FEET NORTH OF A PAVED FOOT TRAIL WHICH RUNS BETWEEN THE VOLCANO HOUSE HOTEL AND THE HIGHWAY AND ABOUT 10 FEET HIGHER THAN THE HIGHWAY. THE STATION IS A U.S. GEOLOGICAL SURVEY BENCH MARK, STAMPED
3973 1912, SET IN THE TOP OF A CONCRETE MONUMENT WHICH HAS A BASE OF 5.6 FEET BY 3.7 FEET AND RISES IN TERRACES TO A HEIGHT OF 4.6 FEET.
Link to Geocaching page:
https://www.geocaching.com/mark/details.aspx?PID=TU0100