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Details for Benchmark: JV1979

N 39° 42.733 W 077° 18.717 (NAD 83)

Altitude: 463.01

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

Location:
In FREDERICK county, MD View Original Datasheet
Designation:
F 82
Marker Type:
bench mark disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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Recovered as described.

[Photos:]
photoDisk
photoView SW

Greetings Geocachers/Benchmarkers,

I found this benchmark disk with no difficulty. How could anyone not find this one! It’s beautiful, and in a very nice location. It’s exactly where it’s supposed to be along N Seaton Ave. in Emmitsburg, MD. It’s exactly as photographed and described by others. Coordinates and directions are adequate for recovery, but there does seem to be one very small error. The official description reads, “set into the top of a round concrete monument” It’s set in a square concrete monument. Oh well, close enough for government work.

Ghosthunter
Gettysburg, PA

A quick find.

Recovered in good condition along the outside curve of N. Seton Ave...

N 39° 42.727 W 077° 18.731

[Photos:]
photoF 82 (JV1979) disk - Frederick County, MD
photoF 82 (JV1979) setting - view looking SE
photoF 82 (JV1979) area - view looking SE

1.0 MILE NORTHEAST ALONG N SETON AVE FROM THE POST OFFICE AT EMMITSBURG, FREDERICK COUNTY, 74 FEET SOUTHWEST OF THE SOUTHWEST CORNER OF A TWO-STORY BLUE HOUSE, 48.5 FEET SOUTHWEST OF A POLE, 30.4 FEET SOUTHEAST OF THE CENTER LINE OF THE HIGHWAY, AND ALONG A WOOD FENCE. A STANDARD DISK, STAMPED F 82 1942 AND SET IN THE TOP OF A CONCRETE POST THAT PROJECTS 6 INCHES.

RECOVERY REPORT SUBMITTED TO THE NGS.

[Photos:]
photoJV1979; Emmitsburg, MD

Documented History (by the NGS)

01/01/1942 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1942 1 MI NE FROM EMMITSBURG. 1.0 MILE NORTHEAST ALONG U.S. HIGHWAY 15 FROM THE POST OFFICE AT EMMITSBURG, FREDERICK COUNTY, 74 FEET SOUTHWEST OF THE SOUTHWEST CORNER OF A TWO-STORY YELLOW HOUSE, 48.5 FEET SOUTHWEST OF A POLE, 30.4 FEET SOUTHEAST OF THE CENTER LINE OF THE HIGHWAY, 7.9 FEET NORTH OF A 6-INCH LOCUST TREE, AND 6.5 FEET EAST OF A FENCE CORNER. A STANDARD DISK, STAMPED F 82 1942 AND SET IN THE TOP OF A CONCRETE POST.
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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