Details for Benchmark: LY1238
N 41° 27.783 W 075° 07.417 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In PIKE county, PA View Original Datasheet
- PTS 22
- Marker Type:
- survey disk
- in rock outcrop
- Most reliable and expected to hold position/elevation well.
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||Zhanna found LY1238
N 41° 27.801 W 075° 07.419
This was to be the final mark for the day, after locating LY1235 nearby. Continuing along T495, a narrow lane skirting the ridge above the tracks and the Lackawaxen River, we looked for a good place to climb down toward this mark. The presence of rocky cliffs all along the distance we traveled was not encouraging, so we backtracked and parked in an empty lot just beyond the bridge over the railroad tracks, and walked southeast along the tracks toward the mark. It was easy to spot the bright yellow disk from a distance. It's set vertically into a ledge just south of the Lackawaxen and Stourbridge Railroad tracks. The disk has a few unusual characteristics. There's a small hole through the center, though the disk doesn't appear to have been disturbed or otherwise damaged. In addition, the stamping appears to have been done with only a set of number stamps. Close inspection reveals that the letters stamped on the disk are actually constructed from the number “1” (and “0” where appropriate). It appears to have taken a bit of work to stamp the letters (and apparently they accidentally omitted the second “T” in STATION). I have to wonder just what happened on that day in 1919.
[I]A report on the condition of this mark has been submitted to NGS, along with the following recovery note:[/I]
Recovered in good condition. The mark is set vertically in the northeast face of a rock ledge along the tracks of the Lackawanna and Stourbridge Railroad, approximately 0.2 miles SE of the Decker Hollow Road (T458) crossing. The
railroad station no longer exists and no evidence of it was found. There is a 3/16-inch x 3/8-inch hole through the center of the disk that obscures one corner of the triangle, but does not appear to have disturbed the remainder of the disk or the setting. The stamping is legible.
[Photos:]LY1238, Pike County, PA
Eye-level view of the mark set in the ledge.
Looking SW across the tracks.
||Rich in NEPA found LY1238
N 41° 27.796 W 075° 07.419
[B]Recovered in good condition.[/B]
This second order vertical control station is set in the northeast face of a high outcropping ledge along side the tracks of the Lackawaxen & Stourbridge Railroad, roughly 0.2 miles southeast of the Decker Hollow Road (T458) crossing. The historical description leads reliably to the station mark, except that the railroad station no longer exists. At the station mark a Garmin GPSmap76 receiver with remote active antenna was used to record autonomous (non-corrected) coordinates which were 79.6 feet from the scaled coordinates listed in the NGS datasheet. The mark is well exposed, in fair condition (there's a small hole through the center), and the stamped designation is readable upon close inspection. ~Rich in NEPA~
[Photos:]LY1238, "PRIM TRAV STATION NO. 22 1919," Pike Cnty
GPSr and the station mark.
Eyelevel view of station mark and setting.
Orientation view to the southwest, mark indicated.
Documented History (by the NGS)
|1/1/1919 by USGS (MONUMENTED)
|1/1/1934 by NGS (GOOD)
|DESCRIBED BY NATIONAL GEODETIC SURVEY 1934
AT KIMBLES. AT KIMBLES, PIKE COUNTY, ON THE ERIE RAILROAD, ABOUT 300 FEET EAST OF THE STATION, IN A ROCK LEDGE, 21 FEET SOUTH OF THE CENTER LINE OF THE TRACK, AND ABOUT 3 FEET HIGHER THAN THE TOP OF THE RAIL. A UNITED STATES GEOLOGICAL SURVEY STANDARD DISK, STAMPED P T STA 22 1919.
|1/1/1959 by USGS (GOOD)
|RECOVERY NOTE BY US GEOLOGICAL SURVEY 1959
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.
- 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.