H 237

NGS PID:
LY1150
Coordinates:
N 41.372716° W 75.078933°
Location:
Elevation:
1411.00 ft.
Type:
Bench Mark Disk
Setting:
Boulder
Year Established:
1959
Established By:
NGS
Status:
Recovered
Condition:
Destroyed as of May 1, 2004

What a way to start the day! On paper, this looked like it would be a simple, typical side-of-the-road benchmark find. But when we arrived on the scene, we found that the large boulder into which the mark is set has been destroyed, probably by heavy equipment. The rock has separated into several large chunks and many smaller pieces of rubble. The section that includes the benchmark was simple balancing on top of the pile! The mark is obviously unusable in such an unstable setting, not to mention that it has moved considerably from its surveyed elevation. We will contact NGS to report our findings, and I assume that they will mark this one Destroyed.

A report on the condition of this survey mark has been submitted to NGS.

Station is destroyed.

This second order vertical control station was set in the top of large boulder along the west-bound shoulder of Blooming Grove Road, roughly 2.6 miles east of the intersection with Rt. 402, and roughly 1 mile west-northwest of the intersection with Rt. 739 at Lords Valley. The historical description leads reliably to the station. However, the boulder has been destroyed (speculation is it was hit by a snowplow or bulldozer), and the chunk of rock with the mark still in it was simply placed atop the pile of rubble as if nothing happened! At the point where the station was found, a Garmin GPSmap76 receiver with remote active antenna was used to record WAAS-corrected coordinates which were 117.3 feet from the scaled coordinates listed in the NGS datasheet. ~Rich in NEPA~

Note: Zhanna has submitted an official recovery report to NGS.

NGS Bench Mark Disk H 237
NGS Bench Mark Disk H 237

GPSr and the station mark.
GPSr and the station mark.

Eyelevel view of station mark and setting.
Eyelevel view of station mark and setting.

Orientation view, facing north, Blooming Grove Rd.
Orientation view, facing north, Blooming Grove Rd.

Orientation view, Zhanna at station.
Orientation view, Zhanna at station.

Orientation view, Zhanna at station.
Orientation view, Zhanna at station.



Update (June 24, 2004): Station mark removed.

NGS has directed that the mark be removed in order to eliminate confusion and errors. Zhanna and I returned to the site on this date to extricate the disk from the remaining piece of the boulder.
~Rich in NEPA~

Process of carefully removing the station mark.
Process of carefully removing the station mark.

Overhead close-up, mark detached from stem.
Overhead close-up, mark detached from stem.

Rich, the Destroyer of Benchmarks ... NOT! Even though it was necessary, I felt bad about doing it.
Rich, the Destroyer of Benchmarks … NOT!
Even though it was necessary, I felt bad about doing it.

Zhanna displays the unfortunate casualty. It was an exciting day, but a sad one nonetheless.
Zhanna displays the unfortunate casualty.
It was an exciting day, but a sad one nonetheless.



See this forum post for more details on the removal:

The Demise of a Benchmark

Photos demonstrating the mark’s removal: