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Details for Benchmark: HL0279

N 37° 50.833 W 107° 43.467 (NAD 83)

Altitude: 10090.8

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

Location:
In SAN JUAN county, CO View Original Datasheet
Designation:
10087.3
Marker Type:
chiseled square
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Documented History (by the NGS)

Unknown by USGS (MONUMENTED)
01/01/1928 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1928 5.9 MI NW FROM SILVERTON. ON EAST EDGE OF HIGHWAY, 1340 FEET NORTH OF FORKS OF OPHIR PASS TRAIL, IN TOP OF STONE CULVERT. CULVERT MARKED U.S. 10087.3 B. M.
01/01/1985 by NGS (MARK NOT FOUND)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1985 MARK NOT FOUND.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The geoid height was determined by GEOID99.

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