TU0516 - "V 15" bench mark disk - Pupukea, HI - U.S. Benchmarks on Waymarking.com

As described by the US Coast and Geodetic Survey ("CGS") back in 1969:

"6.3 MILES NORTHWEST [of Kahuku] ALONG STATE HIGHWAY 83 FROM THE KAHUKU PLANTATION COMPANY HEADQUARTERS AT KAHUKU, IN THE TOP OF THE SOUTH CORNER OF A 4 1/2- BY 4 1/2-FOOT CONCRETE BASE OF A SIGNAL WHICH PROJECTS ABOUT 1 FOOT ABOVE THE GROUND [...]"

While the station is actually closer to Pupukea which is another census-designated place on Oahu, the CGS description is pretty accurate -- as long as one realizes the the "signal" being referenced is actually just a manhole cover (which is level with the ground by now, does not project 1" above the ground). Alternatively, one can use one of the gallery images for any future attempt at actual recovery: it's quite easy to find!

The station was recovered in pretty good condition. Likewise, the NGS' currently posted coordinates (N 21° 40.949 W 158° 1.825) are pretty much in line with my readings. (FYI: the coordinates on www.geocaching.com are completely off and list the BM on private property at someone's back yard, but that's irrelevant at this point since the NGS database has better readings by now).

Below are some additional facts, per the NGS database (with some editing for length): (visit link)

TU0516 ***********************************************************************
TU0516 DESIGNATION - V 15
TU0516 PID - TU0516
TU0516 STATE/COUNTY- HI/HONOLULU
TU0516 COUNTRY - US
TU0516 USGS QUAD - WAIMEA (1983)
TU0516
TU0516 *CURRENT SURVEY CONTROL
TU0516 ______________________________________________________________________
TU0516* NAD 83(1986) POSITION- 21 40 56.91 (N) 158 01 49.49 (W) HD_HELD1
TU0516* LMSL ORTHO HEIGHT - 8.862 (meters) 29.07 (feet) ADJ UNCH
TU0516 ______________________________________________________________________
TU0516
TU0516_MARKER: DB = BENCH MARK DISK
TU0516_SETTING: 35 = SET IN A MAT FOUNDATION OR CONCRETE SLAB OTHER THAN
TU0516+WITH SETTING: PAVEMENT
TU0516_SP_SET: SIGNAL BASE
TU0516_STAMPING: V 15 1969
TU0516_MARK LOGO: CGS
TU0516_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
TU0516+STABILITY: SURFACE MOTION
TU0516
TU0516 HISTORY - Date Condition Report By
TU0516 HISTORY - 1969 MONUMENTED CGS
TU0516 HISTORY - 20060607 GOOD HIDT
TU0516 HISTORY - 20160220 GOOD GEOCAC

Condition: Mark found in good condition Designation: V 15 (stamped as "V 15 1969") Benchmark Agency: U.S. Coast & Geodetic Survey Monumentation type: BENCH MARK (or B.M.) Disk County: Honolulu County (island of Oahu) USGS 7.5' Topographic Quadrangle Name (optional): Waimea Find type: Coordinates and/or to-reach information from the NGS database (or Geocaching's copy of it) were used Web address of this benchmark's datasheet (optional): [Web Link] NGS PID: TU0516 Benchmark Agency (if other): Not listed Monumentation type (if other): Not listed Special category (optional): Not listed Special Category (if other): Not listed Local database's URL (optional): Not listed

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Date Logged Log User Rating   04/10/2017 Raven visited it