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Details for Benchmark: LY1338

N 41° 26.267 W 075° 38.900 (NAD 83)

Altitude: 709.2

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

Location:
In LACKAWANNA county, PA View Original Datasheet
Designation:
B 56
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Didn't find it. Too much grown up around it.

[Photos:]
photoLY1338- Scranton - No Find

We found this, then walked out on the trestle. It was cool!

The benchmark disk is in good shape. We had to push aside a bunch of knotweed and scrape away an inch or so of dirt to spot it. There is now a large concrete barrier on the trestle above and to the right of the benchmark, but it does not impede access.

[Photos:]
photoLY1338
photoLooking down at the benchmark.
photoFarther off view.

Found this one today while BM hunting. The orange paint is still visible on the girder.

Went looking today and couldn't find it. With all of the levee work that has been going on down in the plot, this area got covered with dirt. I knocked a little of it off and still nothing. I'll be back to get this one when I get a small dustbrush.

i looked last year as its only a few block away but i couldnt find it. so when i checked the site a few days ago and saw zhanna found it i knew i had to check it. just as i thought it was covered when i looked and there was no spray paint on it or the bridge. the workers must have found it when they were doing the flood control project. found it at 11 pm so the pix are crap. yay our first benchmark tho. im sure there will be many more

[Photos:]
photobenchmark1.jpg
photobenchmark2.jpg
N 41° 26.277 W 075° 38.908

For a change of pace, I decided to seek out some Scranton benchmarks this morning. After finding MINOOKA RESET in Scranton's south side, I drove to Green Ridge, turned down Race Street into the Plot section, and then spotted the 1904 truss bridge from a block away. The station has been in recent use; it is circled in fluorescent orange paint and orange markings have been made on the bridge as well. The disk is in good condition with all stamping clearly legible. The description is accurate, though it might be better to reference the nearby intersection of Race Street and Amelia Avenue than the intersection of Depot Street and Amelia Avenue, which is 500 feet from the mark.

[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. Handheld GPS WAAS-corrected coordinates for the station are 41 26 16.62(N) 075 38 54.48(W).

[Photos:]
photoLY1138, Lackawanna County, PA
photoEyelevel view of the mark set in the abutment.
photoThe station was easy to spot.
photoLooking W, the location of the mark indicated.

Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
01/01/1961 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1961 AT SCRANTON. AT SCRANTON, LACKAWANNA COUNTY, ON THE DELAWARE AND HUDSON RAILROAD, 500 FEET WEST OF THE CENTERLINE OF DEPOT STREET, 100 FEET NORTH OF THE CENTERLINE OF AMELIA STREET, AT 150-FOOT STEEL-TRUSS BRIDGE 72/11, IN THE SOUTH END OF THE EAST ABUTMENT, 12 FEET SOUTH OF THE EAST-BOUND TRACK, AND 5.5 FEET LOWER THAN THE TOP OF THE RAIL. A STANDARD DISK, STAMPED B 56 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. 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.

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