JV1544 ***********************************************************************
JV1544  DESIGNATION -  27 PRR
JV1544  PID         -  JV1544
JV1544  STATE/COUNTY-  MD/BALTIMORE
JV1544  USGS QUAD   -  PHOENIX (1974)
JV1544
JV1544                         *CURRENT SURVEY CONTROL
JV1544  ___________________________________________________________________
JV1544* NAD 83(1986)-  39 36 04.     (N)    076 37 24.     (W)     SCALED
JV1544* NAVD 88     -        96.505  (meters)     316.62   (feet)  ADJUSTED
JV1544  ___________________________________________________________________
JV1544  GEOID HEIGHT-         -32.35  (meters)                     GEOID99
JV1544  DYNAMIC HT  -          96.457 (meters)     316.46  (feet)  COMP
JV1544  MODELED GRAV-     980,128.6   (mgal)                       NAVD 88
JV1544
JV1544  VERT ORDER  -  SECOND    CLASS 0
JV1544
JV1544.The horizontal coordinates were scaled from a topographic map and have
JV1544.an estimated accuracy of +/- 6 seconds.
JV1544
JV1544.The orthometric height was determined by differential leveling
JV1544.and adjusted by the National Geodetic Survey in June 1991.
JV1544
JV1544.The geoid height was determined by GEOID99.
JV1544
JV1544.The dynamic height is computed by dividing the NAVD 88
JV1544.geopotential number by the normal gravity value computed on the
JV1544.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
JV1544.degrees latitude (g = 980.6199 gals.).
JV1544
JV1544.The modeled gravity was interpolated from observed gravity values.
JV1544
JV1544;                    North         East    Units  Estimated Accuracy
JV1544;SPC MD       -   214,810.      432,350.      MT  (+/- 180 meters Scaled)
JV1544
JV1544                          SUPERSEDED SURVEY CONTROL
JV1544
JV1544  NGVD 29     -        96.736  (m)          317.37   (f) ADJUSTED    2 0
JV1544
JV1544.Superseded values are not recommended for survey control.
JV1544.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
JV1544.See file dsdata.txt to determine how the superseded data were derived.
JV1544
JV1544_MARKER: B = BOLT
JV1544_SETTING: 36 = RAILROAD BRIDGE ABUTMENT
JV1544_MAGNETIC: O = OTHER; SEE DESCRIPTION
JV1544_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL
JV1544_SATELLITE: THE SITE LOCATION WAS REPORTED AS NOT SUITABLE FOR
JV1544+SATELLITE: SATELLITE OBSERVATIONS - June 26, 1997
JV1544
JV1544  HISTORY     - Date     Condition        Recov. By
JV1544  HISTORY     - UNK      MONUMENTED       PRR
JV1544  HISTORY     - 1935     GOOD             CGS
JV1544  HISTORY     - 19970626 GOOD             MD-005
JV1544
JV1544                          STATION DESCRIPTION
JV1544
JV1544''DESCRIBED BY COAST AND GEODETIC SURVEY 1935
JV1544''AT BLUE MOUNT.
JV1544''AT BLUE MOUNT, BALTIMORE COUNTY, ABOUT 700 FEET SOUTH OF THE
JV1544''PENNSYLVANIA RAILROAD STATION, IN THE TOP OF THE SOUTHEAST END
JV1544''OF BRIDGE 24.87, AND 15 FEET EAST OF THE CENTERLINE OF THE EAST
JV1544''TRACK.  A COPPER BOLT.
JV1544
JV1544                          STATION RECOVERY (1997)
JV1544
JV1544''RECOVERY NOTE BY BALTIMORE COUNTY MARYLAND 1997 (WEH)
JV1544''RECOVERED BY THE BALTIMORE COUNTY SURVEY DIVISION 1997 (WEH) . STATION
JV1544''IS ABOUT 4.2 MILES (6.8 KM) SOUTH-SOUTHEAST OF PARKTON AND 2.2 MILES
JV1544''(3.5 KM) EAST-NORTHEAST OF HEREFORD ALONG THE OLD PENNSYLVANIA
JV1544''RAILWAY, NOW THE GUNPOWDER STATE PARK TRAIL.  TO REACH THE STATION
JV1544''FROM THE ROUTE 137 (MOUNT CARMEL ROAD) OVERPASS OF INTERSTATE 83 AT
JV1544''EXIT 27, GO EAST ON ROUTE 137 FOR 0.4 MILES (0.6 KM) TO THE TEE
JV1544''INTERSECTION WITH ROUTE 45 (YORK ROAD) .  TURN RIGHT AND GO SOUTH ON
JV1544''ROUTE 45 FOR 0.1 MILES (0.2 KM) TO THE INTERSECTION WITH ROUTE 138
JV1544''(MONKTON ROAD) ON THE LEFT.  TURN LEFT AND GO EAST ON ROUTE 138 FOR
JV1544''1.1 MILES (1.8 KM) TO THE INTERSECTION WITH BLUE MOUNT ROAD ON THE
JV1544''LEFT.  TURN LEFT AND GO NORTHEAST ON BLUEMOUNT ROAD FOR 1.4 MILES (2.3
JV1544''KM) TO THE GUNPOWDER STATE PARK TRAIL CROSSING AT THE OLD BLUE MOUNT
JV1544''STATION.  STATION IS LOCATED ABOUT 700 FEET (213.4 M) SOUTHWEST ALONG
JV1544''THE BIKE TRAIL ON THE SOUTHEAST BRIDGE ABUTMENT WALL OF RAILROAD
JV1544''BRIDGE 24.87 OVER THE LITTLE FALLS.  STATION MARK IS A 1 1/2 INCH
JV1544''COPPER BOLT SET FLUSH WITH THE TOP ABUTMENT WALL.