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Details for Benchmark: PE1169

N 44° 05.267 W 069° 47.967 (NAD 83)

Altitude: 30.24

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

Location:
In SAGADAHOC county, ME View Original Datasheet
Designation:
31
Marker Type:
survey disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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N 44° 05.258 W 069° 47.971

Recovered in good condition. My photos and coordinates posted.

[Photos:]
photoPE1169 31 close up
photoPE1169 31 eye level
Eye level view to north
photoPE1169 31 area view
Area view to north. Yellow arrow points to mark.

Very easy to find and should have logged it many years ago for as many times as I've passed it.

Was in the area this afternoon and spotted this BM.

Found with Harry and Andy

Found it.®

Found by description. We only found one for four in Richmond. Oh, well.

[Photos:]
photoPE1169 Richmond Sagadahoc ME Close Up
photoPE1169 Richmond Sagadahoc ME View Northeast
photoPE1169 Richmond Sagadahoc ME Eyelevel View

Documented History (by the NGS)

Unknown by USGS (MONUMENTED)
01/01/1935 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1935 AT RICHMOND. AT RICHMOND, SAGADAHOC COUNTY, 2 BLOCKS SOUTHEAST OF THE CENTER OF THE CROSSING OF THE MAINE CENTRAL RAILROAD AND STATE HIGHWAY 197, AT THE SOUTH CORNER OF THE POST OFFICE, IN THE SOUTHWEST WALL, AND 2 FEET ABOVE THE SIDEWALK. A UNITED STATES GEOLOGICAL SURVEY STANDARD DISK, SET VERTICALLY.
01/01/1978 by LOCENG (GOOD)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1978 RECOVERED IN GOOD CONDITION.

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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