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Details for Benchmark: LY2682

N 41° 13.298 W 075° 04.899 (NAD 83)

Altitude: 1414

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

Location:
In PIKE county, PA View Original Datasheet
Designation:
BEAVER
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

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N 41° 13.298 W 075° 04.899

The recovery of the station mark and reference marks 1 and 2 was straightforward. They are located on an easily accessible knoll on State Forest land less than 200 feet west of Route 402. All three marks are in good condition.

Finding the azimuth mark proved difficult. We drove a bit more than a quarter mile north on Route 402, then began to search along the western side of the highway. More than thirty minutes went by before Rich finally found something interesting enough to investigate. He'd come across a corner of concrete just poking out of the ground. We cleared the area as well as we could and discovered that this was in fact the concrete monument holding the azimuth mark, but it was lying in the ground tipped on its side as if it had been struck by heavy equipment. The disk itself is in good enough condition that we could positively identify it, but because of the condition of the setting the mark's value has likely been compromised.

[i]An official report on the condition of this station and associated marks was submitted to NGS, along with the following recovery note:[/i]

The station mark and reference marks 1 and 2 were recovered in good condition. The azimuth mark was found in poor condition with its setting disturbed. The monument has been partially uprooted as if struck by a plow, and it lies tipped at a severe angle though it is still embedded in the ground. Its approximate location is N41°13'30” W075°04'46” as determined by a Garmin GPSmap76 receiver with active remote antenna. (This location is approximately 87 feet northeast of PP&L powerline pole 19041 73415/39661.) Triangle blazes were not found.

Zhanna

[Photos:]
photoLY2682, Pike County, PA
photoEye level view of the monument and mark.
photoThe monument projects about four inches and sits in scrub oak.
photoLooking SE toward Route 402.

photoLY2682 RM1
photoEye level view of the mark.
photoThe disk is secure in the boulder.
photoLooking N toward the station.

photoLY2682 RM2
photoEye level view of the mark.
photoFacing E, toward the station.
photoLooking SW toward the empty lot beyond the knoll.

photoLY2682 AZ MK
photoEye level view of the disturbed monument and mark.
photoLooking NE toward PA Route 402.

N 41° 13.298 W 075° 04.899

[B]Station recovered in good condition.[/B]

This first order triangulation station is situated atop a brush-covered knoll within a section of Delaware State Forest. The 1940 “to reach” directions are still fairly usable. The triangle-blazed pine and oak trees no longer exist, but there is a powerpole at about the right spot. A handheld GPS receiver was helpful in pinpointing the location of the station.

The station and its two reference marks were found as described. The sparse description for the azimuth mark made locating it very difficult. It was eventually found with its setting extremely disturbed and in poor condition. The concrete monument appears to have been struck hard (perhaps by a snowplow blade), partially uprooted and tipped sideways, and became covered over again by accumulated soil and vegetation. It is closer to 0.27 miles north along Rt. 402 of the station, and 87 feet northeast of powerpole number PP&L 19041 73415/39661.

At the station a Garmin GPSmap76 receiver with active remote antenna was used to record WAAS-corrected coordinates which were identical to the adjusted coordinates listed on the NGS datasheet. All marks are now well exposed, in good condition (except as noted for the azimuth mark), and the stamped designations are legible. ~Rich in NEPA~

[last edit: 11/29/2003 4:18:39 PM PST]

[Photos:]
photoLY2682, “BEAVER 1940,” Pike County, PA.
photoGPSr and the station mark.
photoOverhead close-up of monument and nails.
photoEyelevel view of station mark and setting.
photoOrientation view, facing west and RM2.

photoLY2682, “BEAVER NO. 1 1940”
photoGPSr and the reference mark.
photoEyelevel view of reference mark and setting.
photoOrientation view, facing east and Rt. 402.

photoLY2682, “BEAVER NO. 2 1940”
photoGPSr and the reference mark.
photoEyelevel view of reference mark and setting.
photoOrientation view, facing east and the station.

photoLY2682, “BEAVER 1940”
photoGPSr and the azimuth mark.
photoEyelevel view of azimuth mark and setting.
photoOrientation view, facing northeast and Rt. 402.
photoPowerpole ID numbers.

Documented History (by the NGS)

1/1/1940 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1940 (RJS) STATION IS LOCATED ABOUT 11 MILES WEST OF DINGMANS FERRY AND ABOUT 2 MILES SOUTH OF PORTERS LAKE ON STATE FOREST LAND ABOUT 60 YARDS WEST OF STATE HIGHWAY 402. THE MARK IS JUST EAST OF THE TOP OF A SMALL KNOLL AND PROJECTS ABOUT 6 INCHES. NOTES 1A AND 8A. REFERENCE MARK NO. 1 IS SOUTH OF THE STATION IN A BOULDER ABOUT 14 BY 18 INCHES, PROJECTING 10 INCHES ABOVE THE GROUND. NOTE 12C. REFERENCE MARK NO. 2 IS WEST OF THE STATION ON TOP OF THE KNOLL IN A BOULDER ABOUT 4 FEET IN DIAMETER AND PROJECTS ABOUT 1 FOOT. NOTE 12C. AZIMUTH MARK IS ABOUT 0.3 MILE NORTHEAST OF THE STATION, 18 FEET WEST OF THE CENTERLINE OF STATE HIGHWAY 402. IT PROJECTS ABOUT 2 INCHES ABOVE THE GROUND. NOTE 11A. REACHED FROM MILFORD BY GOING SOUTH ON U.S. HIGHWAY 209 FOR 8.3 MILES TO A PAVED ROAD RIGHT AT THE HIGH FALLS HOTEL ON THE NORTH EDGE OF DINGMANS FERRY THEN LEAVE HIGHWAY 209, TURN RIGHT ON THIS PAVED ROAD FOR 1.2 MILES TO A FORK, THEN LEFT FORK WESTERLY ON MAIN PAVED-AND-DIRT ROAD FOR 12.0 MILES TO A T-JUNCTION WITH STATE HIGHWAY 402, THENCE TURN LEFT ON HIGHWAY 402 AND GO 2.35 MILES TO A TRIANGLE BLAZE ON TELEPHONE POLE TO THE RIGHT, ANOTHER ON A 16-INCH PINE TREE TO THE RIGHT. FROM THESE BLAZES GO BACK NORTH FOR 20 PACES ALONG ROAD, THEN GO WEST THROUGH TIMBER ALONG BLAZES (TWO CUT NOTCHES ON TREES) FOR ABOUT 80 YARDS TO THE TOP OF A SMALL KNOLL AND STATION SITE NEAR A TRIANGLE BLAZE ON THE EAST SIDE OF A 6-INCH OAK TREE. HEIGHT OF LIGHT ABOVE STATION MARK-22 METERS.

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 scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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