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Details for Benchmark: LY1157

N 41° 19.700 W 075° 08.217 (NAD 83)

Altitude: 1612.53

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

Location:
In PIKE county, PA View Original Datasheet
Designation:
T 235
Marker Type:
bench mark disk
Setting:
in a boulder
Stability:
May hold, but of type commonly subject to surface motion.

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N 41° 19.704 W 075° 08.232

After our disappointing experience at a nearby bridge trying to locate another mark in this series, Rich and I took the 3/4 mile walk along Lake Laura Road to find this mark. This is a surprisingly pretty location, and even in November it was warm here in the sunshine. The mark is located on the third large boulder from the east at the intersection of the powerline cut and Lake Laura Road. It was found in good condition with legible stamping.

[i]A report on the status of this mark was submitted to NGS, along with the following recovery note:[/i]

Mark recovered in good condition. It is set in the top of the third large boulder from the east, at the powerline clearing along Lake Laura Road. The mark is on property owned by the Blooming Grove Hunting and Fishing Club, HC 8 Box 8066, Hawley, PA 18428. A gate key can be obtained from Scott F. Savini, General Manager, 570-775-7371.

Zhanna

[Photos:]
photoLY1157, Pike County, PA
photoEye-level view of the mark on the boulder.
photoLooking SW from Lake Laura Rd.
photoLooking north to Lake Laura Rd. and another woods road that branches off traveling NNW along the powerline. The sign reads “Lake Laura”.
photoLooking W toward the mark while standing on the eastmost boulder. Rich indicates the general location of the disk.
N 41° 19.704 W 075° 08.234

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

This second order vertical control station is set in the top surface of a large boulder directly under a high-tension powerline running north-south and crossing Lake Laura Road. The historical description leads reliably to the station. There are four boulders centered in the clearing and the station is on the 3rd one (not necessarily the largest) from the east end. At the station a Garmin GPSmap76 receiver with remote active antenna was used to record WAAS-corrected coordinates which were 81.3 feet from the scaled coordinates listed on the NGS datasheet. The mark is well exposed, and the stamped designation is clearly legible. ~Rich in NEPA~

[Photos:]
photoLY1157, “T 235,” Pike County, PA.
photoGPSr and the station mark.
photoEyelevel view of station mark and setting.
photoOrientation view, facing south along powerline.
photoOrientation view, facing southwest, mark indicated.
photoOrientation view, facing northeast, mark indicated.

Documented History (by the NGS)

1/1/1959 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1959 12.8 MI SE FROM HAWLEY. 8.5 MILE SOUTH EAST OF HAWLEY TO THE GOOD SHEPHERD CHURCH THENCE ABOUT 3.55 MILE SOUTH ALONG STATE 402 TO A GRAVEL ROAD WEST THENCE 0.7 MILE WEST ALONG A PRIVATE GRAVEL ROAD KEEPING ON MAIN ROAD TO A POWER LINE CROSSING, SET IN TOP CENTER OF THE LARGEST BOULDER IN THE CENTER OF THE CLEARING FOR THE POWER LINE, ON THE LEFT OF THE ROAD.

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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