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Details for Benchmark: LY1166

N 41° 19.950 W 075° 12.233 (NAD 83)

Altitude: 1809.06

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

Location:
In PIKE county, PA View Original Datasheet
Designation:
T 234
Marker Type:
bench mark disk
Setting:
in a boulder
Stability:
May hold, but of type commonly subject to surface motion.

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Found the remains of the benchmark 9-12-05
The area around the remaining shank isn't totally destroyed, so I don't think it was smashed out by accident. It looks like someone took their time and removed(stole)it...or maybe not.

N 41° 19.959 W 075° 12.249

We found only the shank of a mark in a boulder just east of Route 390, along a dim trail heading east from the highway. We located every reference object noted in the description, and measured the distances and directions from these objects to the station. Our numbers matched the 1959 description, and we concluded we'd found the correct mark (or what remains of it). NGS subsequently determined that our evidence was enough to prove positive identification of the disk. It's listed in Poor condition and may still be useful in certain situations.

[I]A report on the condition of this station was submitted to NGS, along with the following recovery note:[/I]

Recovered in poor condition. Only the shank remains. The outcropping boulder was found as described. The stone culvert, telephone pole number 203, and trailer park still exist, and all distances and directions agree with the 1959 measurements. Handheld GPS WAAS-corrected coordinates for the station are 41 19 57.54(N) 075 12 14.94(W).

Zhanna

[Photos:]
photoLY1166, Pike County, PA
photoEye-level view of the outcropping boulder.
photoLooking NE toward telephone pole #203 & Rt. 390.
N 41° 19.959 W 075° 12.249

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

A site closely matching the historical description for this second order vertical control station was located along the east side of Rt. 390, and a low outcropping rock was found with a drill hole in it containing only the brass stem from a benchmark disk. All of the reference items exist as described, and the distances and bearings provided on the datasheet match up fairly well. A dim grassy double-track trail leads easterly from the highway and passes directly over the rock. There is a trailer park off Oak Road about 150 yards south of the site. The drill hole is roughly 40 feet southeast of BTCo utility pole #203, 48 feet east of the centerline of the highway, and 70 feet south-southeast of the east end of a stone culvert under the highway. At the suspected site a Garmin GPSmap76 receiver with remote active antenna was used to record WAAS-corrected coordinates which were 91.3 feet from the scaled coordinates listed in the NGS datasheet.

~Rich in NEPA~

[I]Note:[/I] Zhanna is submitting an official recovery report to NGS. I am logging this station as “Not Found” pending official determination by NGS. If the agency should declare the station as being in poor condition or destroyed based on our evidence, I will edit the status of this log to “Found” to indicate positive identification.

[I]Edit Note:[/I] NGS has declared the station to be in poor condition. Therefore, I can now change this log from “Not Found” to “Found” since NGS considers the evidence provided is sufficient to prove that the station was postively identified. (See updated datasheet: [B][URL=http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=LY1166]LY1166[/URL][/B])

[This entry was edited by Rich in NEPA on Saturday, August 21, 2004 at 9:09:53 AM.]

[Photos:]
photoLY1166, "T 234 1959," Pike County, PA.
photoGPSr and the station mark.
photoEyelevel view of station mark and setting.
photoOrientation view NW to utility pole (indicated).
photoUtility pole ID numbers.
photoStone culvert, facing northerly along Rt. 390.

Documented History (by the NGS)

1/1/1959 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1959 1 MI N FROM PROMISED LAND. 1.00 MILE NORTH ALONG STATE HY. 390 FROM THE PROMISED LAND STATE RANGER HEADQUARTERS, SET IN TOP AND 1 1/2 FEET WEST OF THE EAST END OF A 3 1/2 FOOT BY 4 FOOT BOULDER PROJECTING ABOUT 6 INCHES, 76 FEET SOUTH EAST OF THE EAST END OF A STONE CULVERT, 42 FEET EAST OF THE CENTERLINE OF THE HIGHWAY, 37 FEET SOUTH EAST OF TELEPHONE POLE NO. 203, ABOUT 150 YARDS NORTH EAST OF A TRAILER PARK.

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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