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Details for Benchmark: LX7249

N 41° 48.692 W 072° 47.926 (NAD 83)

Altitude: 937

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

Location:
In HARTFORD county, CT View Original Datasheet
Designation:
TALCOTT RESET
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

Must Read!

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Was able to get permission to enter and even shown the marks by a teacher as this is a private school property. Most marks are very scratched and hard to read and 1 mark was outside a fence so I couldn't get close.

[Photos:]
photoLX7249 Talcott 189
photoLX7249 Talcott 189 close
Hard to read, but if you zoom in, you can make out part of the name.
photoLX7249 Talcott RM1
photoLX7249 Talcott RM1 close
photoLX7249 Talcott RM2 outside locked fence
photoLX7249 Talcott RM3
photoLX7249 Talcott RM3 close

Documented History (by the NGS)

01/01/1938 by CGS (MONUMENTED)
01/01/1891 by CGS (SEE DESCRIPTION)
DESCRIBED BY COAST AND GEODETIC SURVEY 1891 (WCH) ON TALCOTT MOUNTAIN, NEAR DIVIDING LINE BETWEEN AVON AND BLOOMFIELD TOWNSHIPS, 1 MILE SOUTH OF WADSWORTHS TOWER, AND ABOUT 1/3 MILE SOUTH OF MONTE VIDEC LAKE. THE TOP OF THE MOUNTAIN IS REACHED BY A ROAD RUNNING WEST FROM EAST AVON, A VILLAGE ON THE NEW HAVEN AND NORTHAMPTON RAILROAD, 2 MILES. BLOOMFIELD CENTRE IS 4 MILES DISTANT. DISTANCE FROM STATION TO TRIANGLE CUT ON LEDGE NEAR PRECIPICE 23 FEET. FROM STATION TO TRIANGLE CUT IN LEDGE NORTHEAST OF STATION, 8 FEET 6 INCHES. STATION WAS MARKED IN LEDGE AT SURFACE BY A DRILL HOLE FILLED WITH LEAD AND SURROUNDED BY A TRIANGLE. RECOVERED IN 1891 WITHOUT MUCH DIFFICULTY, THOUGH IN A QUITE INACCESSIBLE PLACE. THE SURFACE MARKS ON THE LEDGE WERE IN GOOD CONDITION. THE MOUNTAIN WAS COVERED WITH A DENSE GROWTH OF YOUNG TIMBER, LARGELY OAK AND HICKORY. THE LAND BELONGS TO MR. R. HOE OF NEW YORK.
01/01/1938 by CTGS (SEE DESCRIPTION)
RECOVERY NOTE BY CONNECTICUT GEODETIC SURVEY 1938 (CJT) STATION, WHICH WAS LEAD IN HOLE TRIANGLE, WAS CHANGED TO A STANDARD DISK STAMPED TALCOTT-1891-1938 AND IS CEMENTED IN LEDGE ABOUT 30 FEET IN DIAMETER, MOST OF WHICH IS COVERED WITH TURF, ABOUT 2 FEET DIAMETER IS NOT COVERED AT STATION MARK. LEDGE IS ON AVON MOUNTAIN AND IS SURROUNDED BY OAK TREES BUT IS CLEAR TO THE WEST. TO REACH FROM THE INTERSECTION OF U.S. HIGHWAYS 44 AND 202 IN AVON, GO EAST ON U.S. HIGHWAY 44 FOR 1.8 MILES TO TOP OF GRADE. TURN LEFT (NORTH) THROUGH STONE GATES AND CONTINUE 1.0 MILE TO HOUSE AND BARN. CONTINUE 200 YARDS TO Y-ROAD. BEAR RIGHT (EAST) AND GO 800 FEET TO WOODS ROAD RIGHT SOUTHEAST. TAKE THIS ROAD 200 YARDS TO BLAZED TREE ON RIGHT (END OF TRUCK TRAVEL). PACK THROUGH WOODS UP TO RIDGE-TOP (200 YARDS) IN WEST-SOUTHWEST DIRECTION TO STATION. REFERENCE MARK NO. 1 IS 16.34 FEET SOUTH-SOUTHWEST OF STATION, CEMENTED IN SAME LEDGE AS STATION, AND IS A STANDARD DISK STAMPED TALCOTT-1891-1938-NO.1. REFERENCE MARK NO. 2 IS 22.90 FEET WEST OF THE STATION, CEMENTED IN SAME LEDGE AS STATION, AND IS A STANDARD DISK STAMPED TALCOTT-1891-1938-NO.2. THE AZIMUTH MARK, AVON CONGREGATIONAL CHURCH SPIRE (1819), IS SITUATED IN AVON AT JUNCTION OF U.S. HIGHWAYS 44 AND 202 AND STATE HIGHWAY 10, ON THE WEST SIDE OF STATE HIGHWAY 10 AND U.S. HIGHWAY 202, FACING U.S. HIGHWAY 44, 150 FEET FROM RAILROAD TRACKS WHICH RUN PARALLEL TO STATE HIGHWAY 10 AND U.S. HIGHWAY 202. AVON-BLOOMFIED TOWN MONUMENT IS 4- BY 6-INCH BROWN STONE BOUND 1-1/2 FEET ABOVE THE GROUND WITH 3/4 INCH CUT MARKING BOUND, 15.90 FEET WEST-NORTHWEST OF THE STATION. HEIGHT OF LIGHT ABOVE STATION MARK 3.3 METERS.
01/01/1961 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (RCY) STATION MARK AND REFERENCE MARKS 1 AND 2 WERE RECOVERED AS DESCRIBED BY C.J.T. 1938. STATION AND REFERENCE MARKS ARE NOW LOCATED INSIDE THE RESTRICTED AREA OF A NIKE SITE. THE PREVIOUS DESCRIPTION OF THE STATION MARK AND REFERENCE MARKS IS ADEQUATE AND THE TO REACH SHOULD BE CHANGED TO READ AS FOLLOWS--TO REACH FROM THE INTERSECTION OF U.S. HIGHWAYS 44 AND 202 IN AVON GO EAST ON U.S. HIGHWAY 44 FOR 2.1 MILES TO TOP OF GRADE AND SIDE ROAD LEFT, MONTIVIDEO ROAD, TURN LEFT ON MONTIVIDEO ROAD AND GO 1.6 MILES TO ENTRANCE TO NIKE SITE. PERSONNEL AT THE NIKE SITE KNOW THE LOCATION OF THE MARKS AND ON REQUEST WILL ESCORT PARTIES TO THE STATION SITE.
01/01/1971 by CTDT (SEE DESCRIPTION)
RECOVERY NOTE BY CT DEPT OF TRANSP 1971 STATION TALCOTT 1875, AND THE TWO RMS WERE RECOVERED IN GOOD CONDITION THE TALCOTT MOUNTAIN SCIENCE CENTER IS NOW LOCATED AROUND THE STATION. NO APPARENT DAMAGE TO THE STATION OR RMS WAS DONE DUE TO ITS CONSTRUCTION. TO REACH FROM THE INTERSECTION OF RT. 10 (COLLEGE HIGHWAY), NOD RD. AND RT 44 (EAST MAIN ST.), AT ALSOP CORNER IN THE TOWN OF AVON, GO EAST ON RT 44 FOR 1.26 MILES AND TAKE LEFT ON MONTEVIDEO RD. PROCEED FOR 1.53 MILES NORTHERLY, THEN SOUTHERLY TO A ROAD ON RIGHT. FOLLOW ROAD WESTERLY UP HILL TO TALCOTT MOUNTAIN SCIENCE CENTER, AND STATION. DIRECTOR SHOULD BE CONTACTED UPON ENTRY.
01/01/1972 by NGS (SEE DESCRIPTION)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1972 (LFS) STATION WAS RECOVERED AND ALL MARKS FOUND IN GOOD CONDITION. THE TALCOTT MTN. SCIENCE CENTER NOW OCCUPPIES THIS HILL AND THERE ARE SEVERAL BUILDINGS, ONE OF WHICH BLOCKS THE VIEW FROM STATION TO THE HARTFORD AREA. FOR THIS REASON, A NEW RM, NO. 3, WAS ESTABLISHED AT A MORE SUITABLE POINT, TO BE USED AS A TRIANGULATION STATION. A DIFFERENCE OF .19-FOOT WAS FOUND IN DISTANCE TO RM 1. RM 2 LIES OUTSIDE A WIRE-MESH FENCE AND DISTANCE WAS NOT CHECKED. A COMPLETE DESCRIPTION FOLLOWS-- STATION IS LOCATED ON THE SUMMIT OF TALCOTT MTN., INSIDE THE TALCOTT MTN. SCIENCE CENTER FENCED AREA, AND ON HIGHEST POINT. TO REACH STATION FROM THE JUNCTION OF STATE HIGHWAY 10 AND U.S. HIGHWAY 44 IN AVON, GO EAST ON U.S. HIGHWAY 44 FOR 1.25 MILES TO SIDE ROAD LEFT, AT TOP OF GRADE. GO LEFT ON MONTEVIDEO RD. FOR 1.5 MILES TO STEEP DRIVEWAY ON RIGHT. GO UP DRIVEWAY ABOUT 100 YARDS TO PARKING AREA AT THE SCIENCE CENTER. WALK ABOUT 50 YARDS UP TO STATION. STATION MARK IS A STANDARD DISK STAMPED TALCOTT 1891 1939, CEMENTED IN A DRILL HOLE IN BEDROCK LEDGE. 4 FEET ABOVE SIDEWALK, 6.7 FEET EAST OF FENCE, 22.5 FEET WEST OF NORTHWEST CORNER OF CONCRETE BLOCK BUILDING, AND 43.5 FEET SOUTH OF SOUTH EDGE OF THE ASTRONOMICAL OBSERVATION DOME. REFERENCE MARK NUMBER ONE IS A STANDARD DISK STAMPED TALCOTT NO 1 1891 1938, CEMENTED IN A DRILL HOLE IN BEDROCK 3-1/2 FEET EAST OF FENCE. REFERENCE MARK NUMBER TWO IS A STANDARD DISK STAMPED TALCOTT NO 2 1891 1938, CEMENTED IN A DRILL HOLE IN BEDROCK 15 FEET WEST OF FENCE. REFERENCE MARK NUMBER THREE IS A STANDARD DISK STAMPED TALCOTT NO 3 1875 1972, CEMENTED IN A DRILL HOLE IN THE CONCRETE SIDEWALK, 7.4 FEET SOUTHEAST OF DOOR OF THE ASTRONOMICAL DOME, 9.77 FEET SOUTHWEST OF NORTHEAST CORNER OF SIDEWALK, AND 5.38 FEET WEST OF EAST EDGE OF SIDEWALK. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN 1-3/4 MILES EAST OF AVON.
01/01/1979 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 (GEL) THE STATION MARK AND REFERENCE MARKS 1, 2, AND 3 WERE RECOVERED AND FOUND IN GOOD CONDITION. THE DIRECTION TO THE REFERENCE MARKS COMPARED FAVORABLY WITH THE 1972 DATA. THE DISTANCE TO REFERENCE MARK 1 AND REFERENCE MARK 3 COMPARED FAVORABLY WITH THE 1972 DATA. NO DISTANCE DATA FOR REFERENCE MARK 2 WAS AVAILABLE AT THIS TIME. A NEW DESCRIPTION FOLLOWS. THE STATION IS LOCATED ABOUT 7 MILES WEST-NORTHWEST FROM DOWNTOWN HARTFORD, 1-1/2 MILES EAST-NORTHEAST OF AVON, AT THE SUMMIT OF TALCOTT MOUNTAIN AND INSIDE THE FENCED AREA OF THE TALCOTT MOUNTAIN SCIENCE CENTER. PERMISSION WAS GRANTED BY MR. DONALD LASALLE, CENTER DIRECTOR, TALCOTT MOUNTAIN, AVON, CONNECTICUT. PHONE NUMBER 677-8571,8572,8573. TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 44 AND STATE HIGHWAY 10 (SOUTH) IN AVON, GO EAST ON U.S. HIGHWAY 44 FOR 1.25 MILES TO MONTEVIDEO ROAD ON THE LEFT, AT THE TOP OF THE GRADE. TURN LEFT AND GO NORTHEASTERLY ON THE WINDING PAVED ROAD (MONTEVIDEO ROAD) FOR 1.45 MILES TO A STOP SIGN AND A STEEP PAVED DRIVE ON THE RIGHT, LEADING TO THE TALCOTT MOUNTAIN SCIENCE CENTER. TURN RIGHT AND GO WEST AND THEN NORTH ON THE NARROW PAVED DRIVE FOR 0.15 MILE TO THE STATION AT THE TOP OF THE RIDGE AND ON THE WEST SIDE OF THE BUILDINGS AS DESCRIBED. THE STATION IS A STANDARD NGS DISK STAMPED---TALCOTT 1891 1938---, SET INTO A ROCK LEDGE. IT IS LOCATED 76.4 FEET NORTH FROM AN OBSERVATORY DOME, 43.6 FEET SOUTH FROM AN OBSERVATORY DOME, 21.6 FEET WEST FROM THE NORTHEAST CORNER OF A CONCRETE BUILDING AND 5.9 FEET EAST FROM THE WIRE MESH FENCE. REFERENCE MARK NUMBER 1 IS A STANDARD NGS DISK STAMPED---TALCOTT 1938 NO 1 1891---, SET INTO A ROCK LEDGE. IT IS LOCATED 62.7 FEET NORTH FROM AN OBSERVATORY DOME, 60.4 FEET SOUTH FROM AN OBSERVATORY DOME, 34.3 FEET WEST-SOUTHWEST FROM THE NORTHEAST CORNER OF A CONCRETE BUILDING AND 4 FEET EAST FROM THE WIRE MESH FENCE. MARK IS BELOW STATION 0.5 METERS. REFERENCE MARK NUMBER 2 IS A STANDARD NGS DISK STAMPED---TALCOTT 1938 NO 2 1891---, SET INTO A ROCK LEDGE. IT IS LOCATED 45.9 FEET SOUTH-SOUTHWEST FROM AN OBSERVATORY DOME, 44.3 FEET WEST FROM THE NORTHWEST CORNER OF A CONCRETE BUILDING AND 17.4 FEET WEST FROM THE WIRE MESH FENCE. MARK IS BELOW STATION 1.0 METERS. REFERENCE MARK NUMBER 3 IS A STANDARD NGS DISK STAMPED---TALCOTT 1875 NO 3 1973---, CEMENTED IN A DRILL HOLE IN A CONCRETE SLAB, 8.5 METERS LARGEST DIMENSION. IT IS LOCATED 39.2 FEET NORTH FROM THE NORTHWEST CORNER OF A CONCRETE BUILDING, 21.2 FEET EAST FROM THE WIRE MESH FENCE AND 7.4 FEET SOUTHEAST FROM AN OBSERVATORY DOME. MARK IS BELOW STATION 1.0 METERS. HEIGHT OF LIGHT SHOWN ABOVE THE MARK WAS 4.9 METERS. NO SUITABLE LOCATION WAS FOUND FOR AN AZIMUTH MARK. DESCRIBED BY G.M. RIVERS, CHECKED BY T.C. HALL.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 (VDN) THE STATION MARK, REFERENCE MARKS 1, 2, AND 3 WERE RECOVERED IN GOOD CONDITION, WITH THE EXCEPTION THAT THE ONLY DISTINGUISHABLE LETTERS ON THE STATION MARK STAMPING ARE TAL 189 193. THE DIRECTIONS BETWEEN THE REFERENCE MARKS AGREED WITH THE PREVIUOS DATA. THE DISTANCE TO REFERENCE MARK 1 AGREED WITH THE 1972 DATA. HOWEVER THE DISTANCE DISAGREED WITH THE 1938 DATA BY 0.20 FOOT LONGER. THE DISTANCE TO REFERENCE MARK 2 DISAGREED WITH THE 1938 DATA BY 0.16 FOOT SHORTER. THE DISTANCE TO REFERENCE MARK 3 AGREED WITH THE PREVIOUS DATA. A TRAVERSE TIE WAS MADE TO REFERENCE MARK 3. THE STATION IS LOCATED 11.3 KM (7 MI) WEST-NORTHWEST FROM DOWNTOWN HARTFORD, 2.4 KM (1-1/2 MI) EAST-NORTHEAST OF AVON, AT THE SUMMIT OF TALCOTT MOUNTAIN AND INSIDE THE FENCE SURROUNDING TALCOTT MOUNTAIN SCIENCE CENTER. OWNERSHIP--TALCOTT MOUNTAIN SCIENCE CENTER, MR DONALD LASALLE-CENTER DIRECTOR, AVON, CT 06001, PHONE 203-677-8571. TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 44 AND STATE HIGHWAY 10 SOUTH IN AVON, GO EAST ON HIGHWAY 44 FOR 2.0 KM (1.25 MI) TO THE TOP OF A GRADE AND A SIDE ROAD LEFT. TURN LEFT AND GO NORTHEASTERLY ON MONTEVIDEO ROAD FOR 2.1 KM (1.3 MI) TO A STOP SIGN AND A CHAIN LINK GATE ON THE LEFT. CONTINUE AHEAD UPHILL FOR 0.3 KM (0.25 MI) TO A STOP SIGN AND A DRIVE RIGHT. TURN RIGHT UPHILL ON THE DRIVE FOR 0.2 KM (0.1 MI) TO A T-INTERSECTION AND THE STATION ON THE RIGHT, JUST WEST OF THE RADAR BUILDING. THE STATION IS A STANDARD CGS DISK STAMPED---TAL 189 193---, SET INTO A ROCK LEDGE. IT IS LOCATED 23.29 METERS (76.4 FT) NORTH FROM THE NORTH SIDE OF AN OBSERVATORY DOME, 13.29 METERS (43.6 FT) SOUTH FROM THE SOUTHSIDE OF AN OBSERVATORY DOME, 6.86 METERS (22.5 FT) WEST FROM THE NORTHWEST CORNER OF A CONCRETE BUILDING, AND 2.26 METERS (7.4 FT) EAST FROM THE CENTER OF A METAL GATE OF WIRE MESH FENCE. REFERENCE MARK NUMBER 1 IS A STANDARD CGS DISK STAMPED---TALCOTT 1938 NO 1 1891---, SET INTO A ROCK LEDGE. IT IS LOCATED 19.11 METERS (62.7 FT) NORTH FROM THE NORTH SIDE OF AN OBSEVATORY DOME, 18.17 METERS (59.6 FT) SOUTH-SOUTHWEST FROM THE SOUTH SIDE OF AN OBSEVATORY DOME, 10.46 METERS (34.3 FT) WEST-SOUTHWEST FROM THE NORTHWEST CORNER OF THE CONCRETE RADAR BUILDING, AND 1.22 METERS (4 FT) EAST-SOUTHEAST FROM THE WIRE MESH FENCE. MARK IS BELOW STATION 0.5 METERS. REFERENCE MARK NUMBER 2 IS A STANDARD CGS DISK STAMPED---TALCOTT 1938 NO 2 1891---, SET INTO A ROCK OUTCROP. IT IS LOCATED 4.82 METERS (15.8 FT) WEST-NORTHWEST FROM THE CORNER OF A WIRE 2.99 METERS (9.8 FT) SOUTHWEST FROM A STONE WITNESS MARKER THAT IS ALSO A TOWN LINE MARKER, AND 0.70 METERS (2.3 FT) EAST FROM THE WEST EDGE OF THE ROCK LEDGE. MARK IS BELOW STATION 0.5 METERS. REFERENCE MARK NUMBER 3 IS A STANDARD NGS DISK STAMPED---TALCOTT NO 3 1875 1973---, SET INTO A CONCRETE SLAB. IT IS LOCATED 11.95 METERS (39.2 FT) NORTH FROM THE NORTHWEST CORNER OF THE CONCRETE RADAR BUILDING, 6.46 METERS (21.1 FT) EAST FROM THE WIRE MESH FENCE, AND 2.44 METERS (8 FT) SOUTHEAST FROM AN OBSERVATORY DOME AT ABOUT THE CENTER OF THE DOOR. MARK IS ABOVE STATION 1 METER. HEIGHT OF LIGHT SHOWN ABOVE THE MARK WAS 3.6 METERS. DESCRIBED BY W.R. ODUM.

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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