Famous British surveyors Charles Mason and Jeremiah Dixon surveyed this area in 1765 and set a series of boundary stones in this complex border area between the states of Pennsylvania, Maryland, and Delaware.
In 1849 a taller dressed tangent stone for a survey line was set next to the original rounded foot-tall Mason-Dixon stone. Later, this 1849 Tangent stone would be assigned the NGS PID JU3840. The NGS datasheet referenced JU3840 being placed next to the Mason-Dixon stone.
From the NGS datasheet for JU3840 Boundary Mon 82 Tangent Stone: (
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JU3840 DESIGNATION - BOUNDARY MON 82 TANGENT STONE
JU3840 PID - JU3840
JU3840 STATE/COUNTY- MD/CECIL
JU3840 COUNTRY - US
JU3840 USGS QUAD - NEWARK WEST (1992)
JU3840
JU3840 *CURRENT SURVEY CONTROL
JU3840 ______________________________________________________________________
JU3840* NAD 83(1991) POSITION- 39 38 56.96122(N) 075 47 18.96136(W) ADJUSTED
JU3840
JU3840_MARKER: V = STONE MONUMENT
JU3840_SETTING: 2 = OBJECT DRIVEN INTO GROUND
JU3840_SP_SET: OBJECT IMBEDDED IN GROUND
JU3840_MAGNETIC: O = OTHER; SEE DESCRIPTION
JU3840_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
JU3840_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
JU3840+SATELLITE: SATELLITE OBSERVATIONS - September 25, 2010
JU3840
JU3840 HISTORY - Date Condition Report By
JU3840 HISTORY - 1958 MONUMENTED CGS
JU3840 HISTORY - 1961 GOOD CGS
JU3840 HISTORY - 1971 GOOD NGS
JU3840 HISTORY - 1977 GOOD NGS
JU3840 HISTORY - 1979 GOOD NGS
JU3840 HISTORY - 20100925 GOOD GEOCAC
JU3840
JU3840 STATION DESCRIPTION
JU3840
JU3840'DESCRIBED BY COAST AND GEODETIC SURVEY 1958 (JCE)
JU3840'STATION IS LOCATED ABOUT 4 MILES SOUTHWEST OF NEWARK, ABOUT 2-1/2
JU3840'MILES NORTHEAST OF ELKTON, ABOUT 2 MILES SOUTHEAST OF ELK MILLS,
JU3840'AND 1/4 MILE NORTHEAST OF IRON HILL RAILROAD DEPOT. IT IS 241
JU3840'FEET NORTHWEST OF MOST WESTERLY RAIL OF THE PENNSYLVANIA RAILROAD
JU3840'TRACKS, 178-1/2 FEET NORTHWEST OF FENCELINE, AND BESIDE OLD
JU3840'TANGENT STONE OF MASON-DIXON. THE MARK IS 18 BY 11 INCHES,
JU3840'PROJECTS 28 INCHES THE LETTERS M AND D ARE VERY LEGIBLE, ALSO
JU3840'THE WORD TANGENT AND THE DATE 1849. POINT INTERSECTED WAS APEX
JU3840'OF THE LARGER GRANITE STONE.
JU3840'
JU3840'REFERENCE MARK NO.1 IS 1 FOOT SOUTHEAST OF FENCELINE, 13-1/2
JU3840'FEET NORTHWEST OF CENTERLINE OF TRACK ROAD, 62-1/2 FEET NORTHWEST
JU3840'OF THE MOST WESTERLY RAIL OF RAILROAD TRACKS OF THE PENNSYLVANIA
JU3840'RAILROAD, AND 43-1/2 FEET EAST OF THE SOUTH END OF A CULVERT. THE
JU3840'MARK IS A STANDARD REFERENCE MARK DISK SET IN A 10 BY 10 INCH
JU3840'CONCRETE MONUMENT, PROJECTS 2 INCHES AND THE DISK IS STAMPED
JU3840'TANGENT NO 1 1958.
JU3840'
JU3840'REFERENCE MARK NO. 2 IS 1 FOOT SOUTHEAST OF FENCELINE, 12 FEET
JU3840'NORTHWEST OF CENTERLINE OF TRACK ROAD, 62-1/2 FEET NORTHWEST OF
JU3840'THE MOST WESTERLY RAIL OF PENNSYLVANIA RAILROAD TRACKS. THE MARK
JU3840'IS A STANDARD REFERENCE MARK DISK SET IN A 10 BY 10 INCH CONCRETE
JU3840'MONUMENT, FLUSH WITH THE GROUND AND THE DISK IS STAMPED TANGENT
JU3840'NO 2 1958.
JU3840'
JU3840'TO REACH FROM THE POST OFFICE IN ELKTON, GO EAST ON STATE
JU3840'HIGHWAY NO. 7 FOR 0.1 MILE, TURN LEFT AND GO NORTH AND NORTHEAST
JU3840'ON STATE HIGHWAY NO. 279 FOR 2.25 MILE TO FORKS, KEEP RIGHT
JU3840'FORK (STATE HIGHWAY NO. 279) FOR 2 MILE TO SIDE ROAD RIGHT, TURN
JU3840'RIGHT ON NARROW GRAVEL ROAD AND GO SOUTHEASTERLY FOR 0.3 MILE
JU3840'TO A SIDE ROAD LEFT LEADING TO RAILROAD STATION, TURN LEFT AND
JU3840'GO NORTHERLY FOR 0.25 MILE TO STATION ON LEFT AS DESCRIBED.
JU3840'
JU3840'HEIGHT OF LIGHT ABOVE STATION MARK 1 METER.
JU3840
JU3840 STATION RECOVERY (1961)
JU3840
JU3840'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (RWT)
JU3840'THE STATION MARK, REFERENCE MARKS 1 AND 2 WERE RECOVERED AS
JU3840'DESCRIBED AND IN GOOD CONDITION. THE DESCRIPTION ARE ADEQUATE.
JU3840
JU3840 STATION RECOVERY (1971)
JU3840
JU3840'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1971 (NER)
JU3840'STA. A LARGE GRANITE MARKER, MARYLAND, DELAWARE STATE LINE
JU3840'
JU3840'TANGENT NO 1 1958 GOOD
JU3840'
JU3840'TANGENT NO 2 1958 GOOD.
JU3840
JU3840 STATION RECOVERY (1977)
JU3840
JU3840'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 (CLN)
JU3840'THE STATION AND ALL MARKS WERE RECOVERED AND FOUND IN GOOD
JU3840'CONDITION AS PREVIOUSLY DESCRIBED.
JU3840'
JU3840'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN
JU3840'4 MILES SOUTHWEST OF NEWARK, DELAWARE.
JU3840
JU3840 STATION RECOVERY (1979)
JU3840
JU3840'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 (RGP)
JU3840'STATION RECOVERED AS PREVIOUSLY DESCRIBED.
JU3840
JU3840 STATION RECOVERY (2010)
JU3840
JU3840'RECOVERY NOTE BY GEOCACHING 2010 (LPC)
JU3840'RECOVERED IN GOOD CONDITION.