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Details for Benchmark: LZ0103

N 41° 23.050 W 076° 08.617 (NAD 83)

Altitude: 1371.2

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

Location:
In WYOMING county, PA View Original Datasheet
Designation:
Y 49
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Benchmark LZ0103
(Labeled Y49, Dated 1934)
03.13.04
3:45 p.m.
Team GeeOh!

Hey CGS, found it! Etrex read 37.6 ft. Elevation on the roadbed was 1365 ft? This benchmark was recovered in good condition. A very easy find. And located right where you said it would be! Pretty much a drive-thru benchmark. This gently graded PA Gamelands access road was once the railroad bed, as mentioned in the NGS history. It appears someone has cut away some rough scrub growing on the abutment next to the marker. The BM is now plainly visible from the bridge deck. All is well. The stream is running full, but it’s clear. Temperature is around 29 degrees F, and its sunny. I include a picture of the marker.

P.S. Easy access on this SGL road to within 4 feet of the benchmark.

GeeOh! :)

[Photos:]
photoLZ0103
LZ0103 Benchmak.
N 41° 23.054 W 076° 08.646

Rich and I picked up another companion for today's adventures, which involved finding the nearby geocache “The Stack.” After an exhilarating hike that involved wading through an icy stream and some very steep and slippery climbing, Aaron might have been almost relieved that our only other plan for the day was to hunt for this benchmark. On our way back to the car from the cache site, we took a slightly different route and emerged on the road to the southwest of the creek, which this time we crossed easily on this old railroad bridge. (Yes, I felt embarrassed.) Our first inspection of the bridge abutments revealed nothing but plentiful brush that needed to be cleared, so we returned to the car for tools. Rich was in the process of clearing the brush when a ranger appeared behind us. He asked gruffly whether we were “cutting down trees in the gamelands” but we assured him we were only clearing a small area on the bridge abutment so that we could find and photograph the mark. He was not very interested in our explanation of the history and importance of benchmarks, and he soon left us alone. The mark is set in the stone abutment exactly as described, and at the time of our visit was in good condition. The stamping is worn but the designation is still quite clear and the date can be read with some effort.

[i]A report on the condition of this mark has been submitted to NGS, along with the following recovery text:[/i]

The mark was recovered in good condition. This part of the old Lehigh Valley Railroad bed is now an access road in PA State Game Lands No. 57 and is easily passable by vehicle.

Zhanna

[Photos:]
photoLZ0103, Wyoming County, PA
photoEye-level view of the mark on the abutment. The SE corner of the bridge is shown.
photoView facing E from the area of the W abutment.
photoLooking SW along the old railroad grade.
N 41° 23.053 W 076° 08.643

[b]Recovered in good condition.[/b]

This second order vertical control station is set in the top of a stone abutment for a former railroad bridge. The bridge spans Cider Run, and the old railroad bed which parallels Bownman Creek southwest from Noxen now serves as an access road within PA State Game Lands #57. The historical description leads reliably to the station. At the station a Garmin GPSmap76 receiver with remote active antenna was used to record WAAS-corrected coordinates which were 120 feet from the scaled coordinates listed on the NGS datasheet. The mark is well exposed, in good condition, and the stamped designation is readable upon close inspection. ~Rich in NEPA~

[Photos:]
photoLZ0103, "Y 49 1934," Wyoming County, PA.
photoGPSr and the station mark.
photoEyelevel view of station mark and setting.
photoOrientation view, facing northeast, mark indicated.
photoOrientation view, facing northeast from bridge.
photoOrientation view, facing southwest, mark indicated.

Documented History (by the NGS)

1/1/1934 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 1.9 MI W FROM BAKERS. ABOUT 1.9 MILES WEST ALONG THE LEHIGH VALLEY RAILROAD FROM BAKERS, WYOMING COUNTY, ABOUT 0.3 MILE EAST OF MILEPOST 205, AT 30-FOOT SPAN PLATE-GIRDER BRIDGE B 205, IN THE SOUTH END OF THE EAST ABUTMENT, 5 FEET SOUTH OF THE SOUTH RAIL, AND ABOUT 3 FEET LOWER THAN THE TOP OF THE RAIL. A STANDARD DISK, STAMPED Y 49 1934.

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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