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Details for Benchmark: LY1199

N 41° 21.580 W 075° 22.762 (NAD 83)

Altitude: 1390.42

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

Location:
In WAYNE county, PA View Original Datasheet
Designation:
URBAN
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

Must Read!

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Was not expecting it to be where it was. Pulled motorcycle off to side of road to take a look at it and then found another one across the street.

Documented History (by the NGS)

1/1/1959 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1959 (CGS) STATION IS LOCATED ON ROAD RIGHT-OF-WAY, ON THE NORTHEAST SIDE OF STATE HIGHWAY 90, ABOUT 0.45 MILE SOUTHEAST OF THE JUNCTION OF STATE HIGHWAYS 90 AND 196, 3-1/2 MILES SOUTH-SOUTHEAST OF HAMLIN AND ABOUT 2 MILES NORTH-NORTHEAST OF STERLING. STATION IS REACHED FROM THE JUNCTION OF STATE HIGHWAYS 90, 590 AND 196, AT TRAFFIC LIGHT, IN HAMLIN. GO SOUTH-SOUTHEAST ON HIGHWAYS 90 AND 196, TOWARD NEWFOUNDLAND, FOR 3.0 MILES AND JUNCTION OF THE TWO HIGHWAYS, BEAR LEFT AND FOLLOW HIGHWAY 90, SOUTH-SOUTHEAST FOR 0.45 MILE TO A LARGE BARN ON THE RIGHT AND THE STATION ON THE LEFT. THIS IS JUST AFTER PASSING A WHITE FRAME HOUSE ON THE RIGHT. AZIMUTH MARK IS REACHED FROM THE STATION. GO SOUTHEAST, ON HIGHWAY 90 FOR 0.1 MILE. TURN RIGHT AND FOLLOW A GRAVELED ROAD, WEST AND WEST-SOUTHWEST FOR 0.42 MILE TO A BOULDER IN A FENCE LINE AND THE AZIMUTH MARK ON THE LEFT. STATION MARK IS A STANDARD DISK, STAMPED URBAN 1959, CEMENTED IN A DRILL HOLE, IN THE TOP OF A 4 X 2 FOOT BOULDER WHICH PROJECTS ABOUT 2 INCHES. IT IS ABOUT 22 FEET NORTHEAST OF THE CENTER LINE OF STATE HIGHWAY 90, 1 FOOT SOUTHWEST OF A FENCE LINE, 29 FEET NORTH OF THE CENTER OF A ROCK CULVERT, 51 FEET EAST OF THE NORTHEAST CORNER OF A LARGE BARN, 98 FEET EAST-SOUTHEAST OF THE SOUTHEAST CORNER OF A WHITE FRAME HOUSE AND 5.1 FEET NORTH-NORTHWEST OF A STANDARD METAL WITNESS POST. REFERENCE MARK 1 IS A STANDARD DISK, STAMPED URBAN NO 1 1959, CEMENTED IN A DRILL HOLE, IN THE TOP OF A ROCK CULVERT WHICH IS FLUSH WITH THE GROUND SURFACE. IT IS ABOUT 13 FEET NORTHEAST OF THE HIGHWAY, 9-1/2 FEET SOUTHWEST OF THE FENCE LINE, 61 FEET EAST-SOUTHEAST OF THE NORTHEAST CORNER OF THE BARN AND ABOUT 116 FEET SOUTHEAST OF THE SOUTHEAST CORNER OF THE HOUSE. REFERENCE MARK 2 IS A STANDARD DISK, STAMPED URBAN NO 2 1959, SET IN THE TOP OF A SQUARE CONCRETE MONUMENT WHICH IS FLUSH WITH THE GROUND SURFACE. IT IS ABOUT 26 FEET SOUTHWEST OF THE HIGHWAY, 1-1/2 FEET NORTHWEST OF THE NORTHEAST CORNER OF THE BARN AND ABOUT 56 FEET SOUTH-SOUTHEAST OF THE SOUTHEAST CORNER OF THE HOUSE. AZIMUTH MARK IS A STANDARD DISK, STAMPED URBAN 1959, CEMENTED IN A DRILL HOLE, IN THE TOP OF A 2-1/2 X 2-1/2 FOOT BOULDER WHICH PROJECTS ABOUT 6 INCHES. IT IS ABOUT 11 FEET EAST OF THE CENTER OF A GRAVELED ROAD, 2 FEET WEST OF A WIRE FENCE, 31 FEET SOUTH-SOUTHWEST OF A 6-INCH APPLE TREE, 42 FEET WEST OF THE CENTER OF A VERY LARGE BOULDER, 132 FEET SOUTH OF A DRIVEWAY ENTRANCE TO A LARGE BARN AND 3.7 FEET NORTH-NORTHEAST OF A STANDARD METAL WITNESS POST. HEIGHT OF LIGHT ABOVE STATION MARK 1 METERS.
1/1/1959 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1959 1.5 MI NE FROM STERLING. 1.50 MILE NORTH-NORTH EAST ALONG BLACKTOP ROAD FROM STERLING, ALSO, 1.40 MILE EAST-NORTH EAST ALONG COUNTY ROAD 63005 FROM STERLING THENCE 1.10 MILE NORTH WEST ON BLACKTOP ROAD, 52 FEET EAST OF RM 2, 71 FEET EAST-SOUTH EAST OF RED MAPLE TREE, 98 FEET EAST-SOUTH EAST FROM CORNER OF A HOUSE, 67 FEET SOUTH EAST OF A POLE, 30 FEET NORTH WEST OF RM 1, 22 FEET NORTH EAST OF THE CENTERLINE OF THE ROAD, 1 FOOT SOUTH WEST OF FENCE LINE, ABOUT 3 FEET ABOVE THE ROAD, AND LEVEL WITH THE GROUND.
1/1/1964 by PADH (SEE DESCRIPTION)
RECOVERY NOTE BY PA DEPT OF HIGHWAYS 1964 AZIMUTH MARK HAS APPARENTLY BEEN MOVED. ANGLE AT URBAN BETWEEN STERLING AND AZIMUTH MARK IS 5-3/4 MINUTES OFF EXISTING LOCATION DOES NOT COINCIDE WITH LOCATION DESCRIBED IN DESCRIPTION OF TRIANGULATION STATION.
1/1/1974 by NGS (SEE DESCRIPTION)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1974 (CLN) THE STATION MARK, REFERENCE MARKS ONE AND TWO WERE RECOVERED AND FOUND IN GOOD CONDITION AS DESCRIBED IN THE 1959 DESCRIPTION. THE BOULDER WHICH THE AZIMUTH MARK WAS SET IN HAS BEEN MOVED TO THE OPPOSITE SIDE OF THE ROAD AND THE DISK WAS REMOVED BY SOME ORGANIZATION IN THE PAST. TRIANGULATION STATION STERLING IS VISIBLE FROM THE GROUND WITH A SMALL AMOUNT OF CLEARING OF TREES. NO NEW AZIMUTH MARK WAS ESTABLISHED. TRIANGULATION STATION STERLING 1959 MAY BE USED AS AN AZIMUTH, SEE DESCRIPTION THEREOF. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN- 2 MILES NNE OF STERLING

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in September 1999.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • 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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