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Details for Benchmark: PH1638

N 44° 17.770 W 074° 00.530 (NAD 83)

Altitude: 1927.7

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

Location:
In ESSEX county, NY View Original Datasheet
Designation:
TT 53 MC
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

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Documented History (by the NGS)

01/01/1942 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1942 (FBQ) STATION IS LOCATED 1.75 MILES NW OF THE LAKE PLACID POST OFFICE AT THE BASE OF A HILL IN THE NW CORNER OF THE GROUNDS OF THE FAWN HOTEL. IT IS 50 FEET E OF THE CENTER LINE OF A MACADAM ROAD, 47 FEET S OF THE CENTER LINE OF STATE HIGHWAY 86, 22.5 FEET S OF A COMBINATION POWER AND TELEPHONE POLE (LPVE 69), 18 FEET NNE OF A COMBINATION POWER AND TELEPHONE POLE (LPVE 70) AND 9.6 FEET NNE OF A WHITE REFERENCE POST. IT IS A BRONZE U.S.G.S.B.M. DISK STAMPED TT 53 MC 1942, SET IN A 6-INCH BY 6-INCH CONCRETE POST THAT PROJECTS 3 INCHES. REFERENCE AND AZIMUTH MARKS ARE BRONZE DISKS SET IN CONCRETE, AS DESCRIBED IN NOTE 11A. REFERENCE MARK NO.1 IS E OF THE STATION, 42 FEET S OF THE CENTER LINE OF STATE HIGHWAY 86 AND 31 FEET ESE OF POLE NO. LPVE 69. IT IS STAMPED U.S.G.S. TT 53 MC NO. 1 1942 AND IS FLUSH WITH THE GROUND. REFERENCE MARK NO.2 IS S OF THE STATION, 50 FEET E OF THE CENTER LINE OF A MACADAM ROAD, 24 FEET NNE OF AN 8-INCH TREE AND 22 FEET SE OF POLE NO. LPVE 70. IT IS STAMPED U.S.G.S. TT 53 MC NO. 2 1942 AND IS FLUSH WITH THE GROUND. THE AZIMUTH MARK IS WSW OF THE STATION AT THE W EDGE OF A SMALL CLEARING. IT IS 140 FEET W OF THE CENTER LINE OF STATE HIGHWAY 86 AND 10 FEET S OF A WHITE REFERENCE POST. IT IS STAMPED U.S.G.S. TT 53 MC 1942 AND PROJECTS 8 INCHES.
01/01/1963 by LDA (SEE DESCRIPTION)
RECOVERY NOTE BY L DICKERSON ASSOC 1963 STATION IS BELIEVED TO HAVE BEEN DESTROYED.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1999.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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 Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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