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Details for Benchmark: MA0080

N 41° 45.267 W 078° 06.417 (NAD 83)

Altitude: 1597.67

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

Location:
In POTTER county, PA View Original Datasheet
Designation:
F 352
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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The catch basin has been replaced.

N 41° 45.260 W 078° 06.420

Another Benchmark today for Driven1 and Driven2. This one also wan't that tough to find. There was another wooden marker stick by it. We did have to dig for the actual marker though. I was buried under dirt that had encroached over the years onto the abutment the marker was on. The was an old pop bottle nearby, so we filled it with water from a spring run-off and cleaned the marker. And yes, we CITOed the pop bottle! Marker is in fine condition.

[Photos:]
photoF352 Marker
F352 Marker in Roulette, PA. Found by Driven1 and Driven2. Another FTF!

Another FTF for Driven1 and me. This disk was difficult to find only for the fact that it was buried under several inches of debris. We cleared the mess away and washed the benchmark off so we could get a picture. This site also had a wooden stake with orange surveryor's tape several inches above the actual disk.

Documented History (by the NGS)

01/01/1968 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1968 3.2 MI E FROM ROULETTE. 3.25 MILES EAST ALONG U.S. HIGHWAY 6 FROM THE POST OFFICE IN ROULETTE, SET IN THE TOP OF THE APPROXIMATE CENTER OF BACKWALL OF A CATCH BASIN, 0.2 MILE NORTHWEST OF THE JUNCTION OF KEATING SUMMIT ROAD, 18 FEET NORTHEAST OF THE CENTERLINE OF HIGHWAY AND IS ABOUT LEVEL WITH THE HIGHWAY.

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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