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Details for Benchmark: LX7223

N 41° 38.918 W 072° 56.819 (NAD 83)

Altitude: 1037

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

Location:
In HARTFORD county, CT View Original Datasheet
Designation:
SOUTH MTN
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

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Documented History (by the NGS)

01/01/1981 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1981 (VDN) THE STATION IS LOCATED ABOUT 8 KM (5 MI) WEST-NORTHWEST OF SOUTHINGTON, 5.6 KM (3.5 MI) EAST-SOUTHEAST OF TERRYVILLE, 2.9 KM (1.8 MI) SOUTH OF BRISTOL AND ON SOUTH MOUNTAIN, AT A SIGHT OF THE CONNECTICUT LIGHT AND POWER COMPANY MICROWAVE MAST, OWNERSHIP--CONNECTICUT LIGHT AND POWER COMPANY, PRELIMINARY PERMISSION BY WALTER WADMAN, C/O CONNECTICUT LIGHT AND POWER COMPANY 9, BARBER STREET, BRISTOL CT 06010, PHONE 203-583-1876. TO REACH THE STATION FROM THE JUNCTION OF STATE HIGHWAY 72 AND MAIN STREET, WHICH IS JUST NORTH OF THE TELEPHONE BUILDING IN BRISTOL, GO SOUTH ON MAIN STREET FOR 0.2 KM (0.15 MI) TO A T-STREET. TURN LEFT AND GO EAST ON SOUTH STREET FOR 0.3 KM (0.2 MI) TO A CROSS STREET AT THE SOUTH CORNER OF THE BARNES ASSOCIATED SPRING FACTORY BUILDING. TURN RIGHT GOING SOUTH ON WILLIS STREET FOR 2.5 KM (1.55 MI) TO THE TOP OF HILL AND A LOCKED GATE ON RIGHT. TURN RIGHT PASSING THROUGH GATE AND GO WEST UPHILL FOR 0.1 KM (0.05 MI) TO THE STATION ON LEFT. THE STATION IS A STANDARD NGS DISK STAMPED---SOUTH MTN 1981---, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 30 CM IN DIAMETER FLUSH WITH GROUND. IT IS LOCATED 34.65 METERS (113.7 FT) SOUTHEAST FROM A POWER POLE WITH TRANSFORMER, 10.35 METERS (33.95 FT) SOUTH FROM THE EAST ONE OF THREE METAL POSTS, 6.6 METERS (21.65 FT) SOUTH FROM THE APPROXIMATE CENTER OF THE PAVED DRIVE AND 1.3 METERS (4.3 FT) NORTH FROM A METAL WITNESS POST. THE UNDERGROUND MARK IS A STANDARD NGS DISK STAMPED---SOUTH MTN 1981---, SET INTO AN IRREGULAR MASS OF CONCRETE 1 METER BELOW THE SURFACE. REFERENCE MARK NUMBER 1 IS A STANDARD NGS DISK STAMPED---SOUTH MTN NO 1 1981---, SET INTO A ROCK OUTCROP. IT IS LOCATED 12.3 METERS (40.35 FT) NORTH FROM THE APPROXIMATE CENTER OF PAVED A DRIVE, 10.45 METERS (34.28 FT) EAST-NORTHEAST FROM THE EAST ONE OF THREE METAL POSTS AND 1.0 METER (3.3 FT) SOUTH-SOUTHWEST FROM A METAL WITNESS POST. MARK IS ABOVE STATION 0.5 METER. REFERENCE MARK NUMBER 2 IS A STANDARD NGS DISK STAMPED---SOUTH MTN NO 2 1981---, SET INTO A ROCK OUTCROP. IT IS LOCATED 23.0 METERS (75.46 FT) WEST FROM A METAL WITNESS POST, 14.89 METERS (48.85 FT) SOUTHEAST FROM A POWER POLE WITH TRANSFORMER AND 8.4 METERS (27.55 FT) SOUTH FROM THE APPROXIMATE CENTER OF THE PAVED DRIVE. MARK IS ABOVE STATION 0.2 METER. HEIGHT OF LIGHT SHOWN ABOVE THE MARK WAS 26.3 METERS. NO SUITABLE LOCATION FOR AN AZIMUTH OR LONG REFERENCE MARK.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in August 1998.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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