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Details for Benchmark: LX2371

N 41° 24.850 W 073° 16.083 (NAD 83)

Altitude: 361.65

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

Location:
In FAIRFIELD county, CT View Original Datasheet
Designation:
6130
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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Documented History (by the NGS)

01/01/1983 by CTGS (MONUMENTED)
DESCRIBED BY CONNECTICUT GEODETIC SURVEY 1983 (AJK) THE STATION IS LOCATED ABOUT 9.3 KM (5.75 MI) WEST OF QUAKER FARMS, 7.3 KM (4.5 MI) NORTHWEST OF STEVENSON AND 5.6 KM (3.5 MI) NORTH OF BOTSFORD. OWNERSHIP--STATE OF CONNECTICUT, DEPARTMENT OF TRANSPORTATION, MR EDWARD J SULLIVAN, CHIEF OF BOUNDARY AND GEODETIC SURVEY, 24 WOLCOTT HILL ROAD, WETHERSFIELD CT 06109, PHONE 203-566-4638. TO REACH THE STATION FROM NEWTOWN IT IS IN THE MEDIAN OF INTERSTATE ROUTE 84 (YANKEE EXPRESSWAY) AT ITS INTERSECTION WITH CONNECTICUT ROUTE 34 CONNECTOR. THE STATION IS A STANDARD CTGS DISK STAMPED---6130---, SET INTO THE TOP OF A SQUARE CONCRETE MONUMENT 15 CM ON A SIDE RECESSED 3 CM BELOW THE GROUND. IT IS LOCATED 25.30 METERS (83.0 FT) SOUTHWEST FROM THE NORTHEASTERLY CORNER OF A BRIDGE ABUTMENT, 8.56 METERS (28.1 FT) NORTH-NORTHEAST FROM THE SOUTHWESTERLY CORNER OF A BRIDGE ABUTMENT AND 5.58 METERS (18.3 FT) NORTHWEST FROM THE FACE OF A BRIDGE ABUTMENT. REFERENCE MARK NUMBER 1 IS A DRILL HOLE IN A HEX HEAD BRASS BOLT (NO STAMPING) IN A 1/4 INCH DRILL HOLE IN A CHISELED TRIANGLE SET INTO THE FACE OF A CONCRETE BRIDGE ABUTMENT SET 0.58 METER ABOVE THE GROUND. IT IS LOCATED 15.54 METERS (51.0 FT) SOUTHWEST FROM THE NORTHEASTERLY CORNER OF A BRIDGE ABUTMENT AND 15.33 METERS (50.3 FT) NORTHEAST FROM THE SOUTHWESTERLY CORNER OF A BRIDGE ABUTMENT. MARK IS ABOVE STATION 0.7 METER. REFERENCE MARK NUMBER 2 IS A DRILL HOLE IN A HEX HEAD BRASS BOLT (NO STAMPING) IN A 1/4 INCH DRILL HOLE IN A CHISELED TRIANGLE SET INTO THE FACE OF A CONCRETE BRIDGE ABUTMENT SET 0.67 METER ABOVE THE GROUND. IT IS LOCATED 29.69 METERS (97.4 FT) SOUTHWEST FROM THE NORTHEASTERLY CORNER OF A BRIDGE ABUTMENT AND 1.19 METERS (3.9 FT) NORTHEAST FROM THE SOUTHWESTERLY CORNER OF A BRIDGE ABUTMENT. MARK IS ABOVE STATION 0.7 METER. REFERENCE MARK NUMBER 3 IS A DRILL HOLE IN A HEX HEAD BRASS BOLT (NO STAMPING) IN A 1/4 INCH DRILL HOLE IN A CHISELED TRIANGLE SET INTO A ROCK LEDGE. IT IS LOCATED 25.60 METERS (84.0 FT) WEST FROM THE NORTHEASTERLY CORNER OF A BRIDGE ABUTMENT, 20.42 METERS (67.0 FT) NORTH FROM THE SOUTHWESTERLY CORNER OF A BRIDGE ABUTMENT AND 16.55 METERS (54.3 FT) NORTHWEST FROM THE FACE OF A BRIDGE ABUTMENT. MARK IS BELOW STATION 1.0 METER. AZIMUTH MARK NUMBER 1 IS A STANDARD CTGS DISK STAMPED---6129---, SET INTO THE TOP OF A SQUARE CONCRETE MONUMENT 15 CM ON A SIDE RECESSED 8 CM BELOW THE GROUND. IT IS LOCATED 13.20 METERS (43.3 FT) WEST-NORTHWEST FROM POWER POLE 386, 17.83 METERS (58.5 FT) EAST-NORTHEAST FROM POWER POLE 385, 24.26 METERS (79.6 FT) SOUTHEAST FROM POWER POLE 3808 AND 6.71 METERS (22.0 FT) SOUTH FROM THE CENTERLINE OF CHURCH HILL ROAD. TO REACH AZIMUTH MARK FROM NEWTOWN AT THE INTERSECTION OF CONNECTICUT ROUTE 25 (MAIN STREET) AND U.S. ROUTE 6 (CHURCH HILL ROAD) PROCEED EASTERLY ALONG U.S. ROUTE 6 FOR 1.6 KM (0.99 MI) TO THE STATION ON THE RIGHT. AZIMUTH MARK NUMBER 2 IS A STANDARD CDOT DISK STAMPED---C 2334---, SET INTO A ROCK LEDGE. IT IS LOCATED 22.86 METERS (75.0 FT) NORTH FROM THE CENTERLINE OF AN ENTRANCE RAMP, 9.75 METERS (32.0 FT) NORTH FROM THE EDGE OF A ROCK CUT AND 9.60 METERS (31.5 FT) NORTHWEST FROM A SHORT 4 CM HEMLOCK TREE. TO REACH AZIMUTH MARK FROM NEWTOWN AT THE INTERSECTION OF CONNECTICUT ROUTE 34 (WASHINGTON AVENUE) AND INTERSTATE ROUTE 84 (YANKEE EXPRESSWAY) PROCEED SOUTHEASTERLY ALONG CONNECTICUT ROUTE 34 FOR 1.1 KM (0.71 MI) TO A ROAD RIGHT. TAKE RIGHT AND PROCEED WESTERLY ALONG MILE HILL ROAD FOR 0.3 KM (0.16 MI) TO AN ENTRANCE RAMP ON THE LEFT. TAKE LEFT AND PROCEED NORTHERLY ALONG ENTRANCE RAMP FOR 0.7 KM (0.41 MI) TO A FORK. BEAR LEFT AT FORK FOLLOWING SIGNS HEADING WEST, AND PROCEED NORTH AND NORTHWESTERLY FOR 0.7 KM (0.42 MI) TO THE STATION ON THE RIGHT, IN A ROCK CUT, APPROXIMATELY 12 METERS ABOVE THE ROAD GRADE. AZIMUTH MARK NUMBER 3 IS A STANDARD CTGS DISK STAMPED---6131---, SET INTO THE TOP OF A SQUARE CONCRETE MONUMENT 15 CM ON A SIDE RECESSED 3 CM BELOW THE GROUND. IT IS LOCATED 12.37 METERS (40.6 FT) WEST FROM POWER POLE 375, 5.64 METERS (18.5 FT) WEST FROM THE CENTERLINE OF AN ENTRANCE RAMP HEADING WEST, 17.07 METERS (56.0 FT) WEST-NORTHWEST FROM THE CENTERLINE OF AN ENTRANCE RAMP HEADING EAST, 40.23 METERS (132.0 FT) NORTH FROM THE CENTERLINE OF A CATCH BASIN AND 28.96 METERS (95.0 FT) SOUTHWEST FROM THE CENTERLINE OF A CATCH BASIN. TO REACH AZIMUTH MARK FROM NEWTOWN AT THE INTERSECTION OF CONNECTICUT ROUTE 34 (WASHINGTON AVENUE) AND INTERSTATE ROUTE 84 (YANKEE EXPRESSWAY) PROCEED SOUTHEASTERLY ALONG CONNECTICUT ROUTE 34 FOR 1.1 KM (0.71 MI) TO A ROAD RIGHT. TAKE RIGHT AND PROCEED WESTERLY ALONG MILE HILL ROAD FOR 0.3 KM (0.16 MI) TO AN ENTRANCE RAMP ON THE LEFT. TAKE LEFT AND PROCEED NORTHERLY ALONG ENTRANCE RAMP FOR 0.7 KM (0.41 MI) TO A FORK. BEAR LEFT AT FORK FOLLOWING SIGNS HEADING WEST AND CONTINUE NORTHERLY FOR 0.1 KM (0.07 MI) TO THE STATION ON THE RIGHT. HEIGHT OF LIGHT SHOWN ABOVE THE MARK WAS 1.5 METERS. DESCRIBED BY S MCCUSKER.
01/01/1985 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1985 1.2 KM (0.75 MI) SE FROM SANDY HOOK. 1.2 KM (0.75 MI) SOUTHEAST ALONG INTERSTATE 84 FROM THE SOUTHEAST END OF THE HIGHWAY BRIDGE OVER THE POOTATUCK RIVER IN SANDY HOOK TO THE MARK ON THE LEFT, IN THE MEDIAN OF THE HIGHWAY, AT THE INTERSECTION WITH STATE HIGHWAY 34 CONNECTOR, 25.30 METERS (83.0 FT) SOUTHWEST OF THE NORTHWEST CORNER OF A BRIDGE ABUTMENT, 8.56 METERS (28.1 FT) NORTH-NORTHEAST OF THE SOUTHWEST CORNER OF A BRIDGE ABUTMENT, 5.58 METERS (18.3 FT) NORTHWEST OF THE FACE OF A BRIDGE ABUTMENT. THE MARK IS 1.22 M ABOVE INTERSTATE.

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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