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Details for Benchmark: LX6411

N 41° 20.526 W 072° 51.177 (NAD 83)

Altitude: 372

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

Location:
In NEW HAVEN county, CT View Original Datasheet
Designation:
RABBIT ROCK
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

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Found drill hole with remains of shank. Disk has been gone a long time.
Saw a bolt with cross mark on it. I am not sure which RM it may have been.

[Photos:]
photoWhat's left of LX6411

Being that this is a popular "party spot", it seems the disks are gone. I did find thier location and some bolts at a few of those spot.

[Photos:]
photobenchmark LX6411 Rabbit Rock
photobenchmark LX6411 disc hole
photobenchmark LX6411 bolt 1
photobenchmark LX6411 bolt 2
photobenchmark LX6411 bolt 2 close
photobenchmark LX6411 bolt 3

Documented History (by the NGS)

1/1/1870 by CGS (MONUMENTED)
1/1/1871 by CGS (SEE DESCRIPTION)
DESCRIBED BY COAST AND GEODETIC SURVEY 1871 (EG) THE STATION OF 1838 WAS SEARCHED FOR WITHOUT SUCCESS. STATION IS ON RABBIT ROCK, KNOWN IN THE IMMEDIATE NEIGHBORHOOD AS PETERS ROCK AND DESIGNATED AS GREAT ROCK IN THE LIST OF GEOGRAPHICAL POSITIONS IN THE REPORT OF 1851. THE ROCK MAY BE REACHED FROM NEW HAVEN, EITHER BY WAY OF GRAND STREET THROUGH FAIR HAVEN TO NORTH QUINIPIAC STREET, THENCE BY THE LATTER STREET ABOUT 2-1/2 MILES TO THE MIDDLETOWN TURNPIKE AND THENCE HALF A MILE TO THE WOOD ROAD LEADING TO THE FOOT OF THE HILL. OR BY WAY OF STATE STREET DIRECT TO THE MIDDLETOWN TURNPIKE. STATION MARKED BY AN IRON BOLT 4 INCHES LONG AND A LITTLE OVER 1/2 INCH IN DIAMETER, SET WITH SULPHUR IN A HOLE DRILLED IN THE ROCK. IT IS ON A BROAD FLAT ROCK TO THE S OF THE MASS OF TRAP FORMING THE TOP OF THE HILL. RABBIT ROCK IS WILD LAND IN THE TOWN OF NORTH HAVEN, BELONGING TO THE COUNTY OF NEW HAVEN.
1/1/1933 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1933 (GCM) THIS STATION IS LOCATED ON PETERS ROCK, ON THE E SIDE OF THE MIDDLETOWN TURNPIKE, IN THE TOWN OF NORTH HAVEN. APPROACHING FROM NEW HAVEN, GO VIA MIDDLETOWN AVENUE TO ITS INTERSECTION WITH QUINIPIAC AVENUE. GO 0.5 MILE ON THE ROAD TO MIDDLETOWN. TURN RIGHT ON WOODS ROAD AND GO 1/4 MILE TO THE FOOT OF PETERS ROCK. FROM HERE THERE ARE SEVERAL PATHS TO THE SUMMIT BUT THE ONE FROM THE SOUTHEASTWARD SEEMS THE BEST. STATION IS NOT ON THE HIGHEST PART OF THE HILL BUT IS ABOUT 20 METERS TO THE WESTWARD ON A FLAT OUTCROPPING TRAP ROCK LEDGE. TO THE NORTHWARD THIS LEDGE BREAKS SHARPLY TO THE LEVEL GROUND OF THE MONTOWESE FARMING LANDS. CENTER IS AN IRON BOLT LEADED TO THE ROCK FLUSH WITH THE SURFACE OF THE LEDGE. THERE ARE SEVERAL LONGER BOLTS IN THE VICINITY, ALSO LEADED IN, WHICH WERE ONCE USED AS ANCHORAGE FOR A BUILDING. REFERENCE MARK NO. 1 WAS ESTABLISHED IN SAME LEDGE AS STATION IN ORDER TO IDENTIFY THE CENTER BOLT. IT IS 0.82 METER DISTANT. REFERENCE MARK NO. 2 WAS ESTABLISHED IN THE EDGE OF THE LEDGE AT THE HIGHEST PART OF THE HILL. IT IS 19.75 METERS DISTANT. BOTH REFERENCE MARKS ARE BRONZE TABLETS ESTABLISHED IN 1933. THE CENTER MARK IS THE ORIGINAL 1870 MARK.
1/1/1942 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1942 (KBJ) THE STATION WAS RECOVERED AS DESCRIBED IN 1933, WITH THE EXCEPTION OF REFERENCE MARK NO. 1 AND REFERENCE MARK NO. 2. REFERENCE MARK NO. 1 HAS BEEN COMPLETELY DESTROYED. REFERENCE MARK NO. 2 WAS FOUND IN PLACE BUT THE DISK HAS BEEN BADLY BATTERED AND THE STAMPING IS NOT NOTICEABLE. REFERENCE MARK NO. 3 WAS ESTABLISHED AND ALSO AN AZIMUTH MARK. A COMPLETE DESCRIPTION FOLLOWS. REFERENCE MARK NO. 3 IS 18.477 METERS (60.62 FEET) W OF THE STATION. THE DISK IS SET IN A DRILLED HOLE IN OUTCROPPING BEDROCK AS DESCRIBED IN NOTE 12A. IT IS ABOUT 3 FEET LOWER IN ELEVATION THAN THE STATION MARK. THE DISK I STAMPED RABBIT ROCK NO. 3 1942. THE AZIMUTH MARK IS 0.4 MILE N OF THE STATION, 0.5 MILE NW OF THE JUNCTION OF ALTERNATE U.S. HIGHWAY 5 AND CONN. STATE HIGHWAY 15, WHICH IS ON THE SOUTHERN EDGE OF THE TOWN OF MONTOWESE, 23.4 FEET S OF THE CENTERLINE OF CONN. STATE HIGHWAY 15, 5.4 FEET W OF A POWER LINE POLE NO. 2004, 4.8 FEET W OF A DIM TRACK ROAD S, 3.7 FEET SE OF A STANDARD REFERENCE POST. THE DISK IS STAMPED RABBIT ROCK 1942. NOTE 11A.
1/1/1976 by NGS (SEE DESCRIPTION)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1976 (JLC) THE STATION MARK WAS RECOVERED, BUT ONLY THE SHANK OF THE DISK REMAINS. THE DRILL HOLE FOR REFERENCE MARK 1 WAS RECOVERED, BUT THE DISK WAS GONE. REFERENCE MARK 3 WAS RECOVERED IN GOOD CONDITION. ONLY THE DRILL HOLE FOR REFERENCE MARK 2 WAS RECOVERED AND REFERENCE MARK 4 DISK WAS CEMENTED IN IT AT THIS TIME. THE DISTANCE TO REFERENCE MARK 3 WAS LESS BY 0.021 OF A METER. THE DISTANCE AND DIRECTION TO REFERENCE MARK 1 DRILL HOLE CHECKED THE OLD DATA. A COMPLETE NEW DESCRIPTION FOLLOWS. THE STATION IS ABOUT 3-1/4 MILES NORTHEAST OF NEW HAVEN 3-1/4 MILES SOUTHEAST OF SPRING GLEN, 3/4 MILE SOUTHEAST OF MONTOWESE AND IS ON PROPERTY OWNED BY THE CITY OF NORTH HAVEN, PERMISSION BY MR. WALTER GAWRYCH, TOWN HALL, FIRST SELECTMAN, NORTH HAVEN, CONNECTICUT 04853, PHONE NUMBER 239-5321. TO REACH THE STATION FROM THE JUNCTION OF STATE HIGHWAYS 80 AND 17, WHICH IS ABOUT 200 FEET EAST OF INTERSTATE 91 AND ABOUT 1-1/4 MILES NORTHEAST OF NEW HAVEN, GO NORTHEAST ON HIGHWAY 17 FOR 1.45 MILES TO A CROSS ROAD, QUINNAPAC AVENUE. CONTINUE NORTHEAST ON HIGHWAY 17 FOR 0.6 MILE TO A SIDE ROAD LEFT, VILLAGE STREET. CONTINUE NORTHEAST ON HIGHWAY 17 FOR 0.15 MILE TO A SIDE ROAD RIGHT. TURN RIGHT AND GO SOUTHERLY ON HERMITAGE LANE FOR 0.35 MILE TO A FORK. CONTINUE STRAIGHT AHEAD ON A NARROW TRACK ROAD FOR ABOUT 200 FEET AND THE END OF TRUCK TRAVEL. FROM HERE PACK SOUTHERLY UP A STEEP HILL THROUGH THE WOODS FOR ABOUT 15 MINUTES TO THE TOP OF THE HILL AND THE STATION, WHICH IS JUST WEST OF THE HIGHEST PART OF THE HILL, ON A LARGE OUTCROPPING OF BEDROCK. STATION MARK IS A SHANK OF A BRASS DISK CEMENTED IN A DRILL HOLE IN BEDROCK. IT IS 28 FEET EAST OF THE WEST EDGE OF A LEDGE, 6 FEET SOUTHWEST OF THE NORTHEAST EDGE OF A LEDGE AND 4 FEET SOUTH OF THE NORTH EDGE OF A LEDGE. REFERENCE MARK 1 IS A 1/2 INCH DRILL HOLE IN BEDROCK. IT IS AT THE SAME LOCATION AS THE STATION MARK. REFERENCE MARK 3, STAMPED---RABBIT ROCK NO 3 1942---, IS A STANDARD DISK CEMENTED IN A DRILL HOLE IN BEDROCK. IT IS 18 FEET NORTH OF A SMALL OAK TREE, 16 FEET WEST OF A SMALL TREE AND 2 FEET EAST OF THE WEST EDGE OF A ROCK LEDGE. IT IS ABOUT 3 FEET LOWER THAN THE STATION. REFERENCE MARK 4, STAMPED---RABBIT ROCK 1870 NO 4 1976---, IS A STANDARD DISK CEMENTED IN A DRILL HOLE IN BEDROCK. IT IS 28 FEET SOUTHWEST OF THE NORTHEAST EDGE OF THE ROCK OUTCROP, 16 FEET NORTHEAST OF THE SOUTHWEST EDGE OF THE ROCK OUTCROP AND 14 FEET SOUTH OF A CLUMP OF TREES. THE OLD AZIMUTH MARK WAS SEARCHED FOR BUT NOT RECOVERED. NO SUITABLE PLACE WAS FOUND TO SET A NEW AZIMUTH MARK. THE HEIGHT OF THE LIGHT ABOVE THE MARK WAS 1.4 METERS. DESCRIBED BY L.D. ACRES.

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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