Details for Benchmark: KW2247
N 40° 00.433 W 077° 33.167 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In FRANKLIN county, PA View Original Datasheet
- ROCK RM 1
- Marker Type:
- reference mark disk
- in a boulder
- May hold, but of type commonly subject to surface motion.
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||Ernmark found KW2247
Recovered in good condition - SE of the main station & under a wire fence..
N 40° 00.426 W 077° 33.163
[Photos:]ROCK RM 1 (KW2247) disk - Franklin County, PA
ROCK RM 1 (KW2247) setting - view looking N
ROCK RM 1 (KW2247) area - view looking N
..toward main station in background center
||Ghosthunter found KW2247
We found this RM1 disk with no difficulty. We found RM2 as well. Both are as described, in good shape, exactly where they’re supposed to be, at the top of a hill SW of Shippensburg, PA, in Franklin Co. near Triangulation Station ROCK. Coordinates and directions are adequate for recovery. Thanks to gnbrotz for his help with recovery of this station. A fun recovery.
||gnbrotz found KW2247
I recovered this mark, as well as the station & RM2 with my friend Ghosthunter. Pacing of RM distances was a bit tricky with all the cow manure, and the heifers seemed quite interested in what we were doing.
Documented History (by the NGS)
|01/01/1960 by CGS (MONUMENTED)
|DESCRIBED BY COAST AND GEODETIC SURVEY 1960
5.2 MI S FROM SHIPPENSBURG. 4.45 MILES SOUTH ALONG STATE HIGHWAY 696 FROM THE JUNCTIONS OF U.S. HIGHWAY 11 AND STATE HIGHWAY 696 IN SHIPPENSBURG, THENCE RIGHT 0.4 MILE WEST ON AN ASPHALT ROAD TO A DRIVEWAY LEFT, THENCE LEFT UP DRIVEWAY FOR 0.3 MILE TO THE REFERENCE MARK, IS SET IN THE TOP OF A 2 X 5 FOOT BOULDER THAT PROJECTS ABOUT 5 INCHES ABOVE THE SURFACE OF THE GROUND, 15.5 FEET NORTH-NORTHWEST OF THE WEST 1 OF 5 PINE TREES, 52.0 FEET NORTH-NORTHEAST OF THE FENCE CORNER AND IS ABOUT 3.0 FEET LOWER THAN THE STATION.
|01/01/1979 by NGS (GOOD)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979
RECOVERED IN GOOD CONDITION.
- 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. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
- 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.