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Details for Benchmark: JV2104

N 39° 53.317 W 077° 11.533 (NAD 83)

Altitude: 537.35

Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)

Location:
In ADAMS county, PA View Original Datasheet
Designation:
Y 305
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Found in excellent condition as described. The PI has been irradicated.

[Photos:]
photoJV2104 Y305 Adams Co., PA
photoJV2104 location looking S.

..passed on this one back in the summer when it was totally shrouded in poison ivy...which is still there...just waiting for spring.

[Photos:]
photoY 305 (JV2104) disk - Adams County, PA
photoY 305 (JV2104) disk - edge view looking S
..still well guarded by poison ivy - you can see a little green just to the right of the disk where I scuffed it w/ my shoe to get it out of the way
photoY 305 (JV2104) area - view looking S

Greetings Geocachers/Benchmarkers,

I found this benchmark with very little difficulty. It’s in terrific shape and exactly where it’s supposed to be.

Happy Benchmarking,
Ghosthunter
Gettysburg, PA

Documented History (by the NGS)

01/01/1966 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1966 4.2 MI NE FROM GETTYSBURG. ABOUT 4.2 MILES NORTHEAST ALONG U.S. HIGHWAY 15 FROM ITS JUNCTION WITH STATE HIGHWAY 34 IN THE NORTH EDGE OF GETTYSBURG, 4.8 MILES SOUTHWEST OF HEIDLERSBURG, 0.3 MILE SOUTHWEST OF STATE HIGHWAY 394, 19 FEET SOUTHEAST OF THE CENTERLINE OF HIGHWAY, 1.5 FEET NORTHEAST OF THE SOUTHWEST END OF HEADWALL, SET IN THE TOP OF THE SOUTHEAST HEADWALL OF A CONCRETE CULVERT AND IS ABOUT 1 FOOT BELOW THE LEVEL OF THE HIGHWAY.
01/01/1971 by PADH (GOOD)
RECOVERY NOTE BY PA DEPT OF HIGHWAYS 1971 RECOVERED IN GOOD CONDITION.
01/01/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (NH) RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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