JV1538 ***********************************************************************
JV1538  DESIGNATION -  33 PRR
JV1538  PID         -  JV1538
JV1538  STATE/COUNTY-  MD/BALTIMORE
JV1538  USGS QUAD   -  NEW FREEDOM (1974)
JV1538
JV1538                         *CURRENT SURVEY CONTROL
JV1538  ___________________________________________________________________
JV1538* NAD 83(1986)-  39 40 21.     (N)    076 40 29.     (W)     SCALED
JV1538* NAVD 88     -       152.732  (meters)     501.09   (feet)  ADJUSTED
JV1538  ___________________________________________________________________
JV1538  GEOID HEIGHT-         -32.32  (meters)                     GEOID99
JV1538  DYNAMIC HT  -         152.658 (meters)     500.85  (feet)  COMP
JV1538  MODELED GRAV-     980,133.9   (mgal)                       NAVD 88
JV1538
JV1538  VERT ORDER  -  SECOND    CLASS 0
JV1538
JV1538.The horizontal coordinates were scaled from a topographic map and have
JV1538.an estimated accuracy of +/- 6 seconds.
JV1538
JV1538.The orthometric height was determined by differential leveling
JV1538.and adjusted by the National Geodetic Survey in June 1991.
JV1538.WARNING-Repeat measurements at this control monument indicate possible
JV1538.vertical movement.
JV1538
JV1538.The geoid height was determined by GEOID99.
JV1538
JV1538.The dynamic height is computed by dividing the NAVD 88
JV1538.geopotential number by the normal gravity value computed on the
JV1538.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
JV1538.degrees latitude (g = 980.6199 gals.).
JV1538
JV1538.The modeled gravity was interpolated from observed gravity values.
JV1538
JV1538;                    North         East    Units  Estimated Accuracy
JV1538;SPC MD       -   222,720.      427,910.      MT  (+/- 180 meters Scaled)
JV1538
JV1538                          SUPERSEDED SURVEY CONTROL
JV1538
JV1538  NGVD 29     -       152.945  (m)          501.79   (f) ADJUSTED    2 0
JV1538
JV1538.Superseded values are not recommended for survey control.
JV1538.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
JV1538.See file dsdata.txt to determine how the superseded data were derived.
JV1538
JV1538_MARKER: B = BOLT
JV1538_SETTING: 36 = RAILROAD BRIDGE ABUTMENT
JV1538_MAGNETIC: O = OTHER; SEE DESCRIPTION
JV1538_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL
JV1538_SATELLITE: THE SITE LOCATION WAS REPORTED AS NOT SUITABLE FOR
JV1538+SATELLITE: SATELLITE OBSERVATIONS - June 26, 1997
JV1538
JV1538  HISTORY     - Date     Condition        Recov. By
JV1538  HISTORY     - UNK      MONUMENTED       PRR
JV1538  HISTORY     - 1942     GOOD             CGS
JV1538  HISTORY     - 19970626 GOOD             MD-005
JV1538
JV1538                          STATION DESCRIPTION
JV1538
JV1538''DESCRIBED BY COAST AND GEODETIC SURVEY 1942
JV1538''1.2 MI N FROM WALKER.
JV1538''1.2 MILES NORTH ALONG THE PENNSYLVANIA RAILROAD FROM THE FORMER
JV1538''STATION AT WALKER, BALTIMORE COUNTY, 0.2 MILE SOUTH OF THE
JV1538''BENTLEY STATION, AT BRIDGE 31.18 OVER BEETREE RUN, IN THE TOP
JV1538''OF THE WEST WING OF THE NORTH ABUTMENT, AND 9 FEET WEST OF THE
JV1538''CENTERLINE OF THE WEST TRACK.  A COPPER BOLT.
JV1538
JV1538                          STATION RECOVERY (1997)
JV1538
JV1538''RECOVERY NOTE BY BALTIMORE COUNTY MARYLAND 1997 (WEH)
JV1538''RECOVERED BY THE BALTIMORE COUNTY SURVEY DIVISION 1997 (WEH) . STATION
JV1538''IS LOCATED ABOUT 3.25 MILES (5.23 KM) SOUTH-SOUTHWEST OF THE TOWN OF
JV1538''MARYLAND LINE AND 1.7 MILES (2.7 KM) NORTHWEST OF PARKTON ALONG THE
JV1538''OLD PENNSYLVANIA RAILWAY, NOW THE GUNPOWDER STATE PARK TRAIL.  TO
JV1538''REACH THE STATION FROM THE ROUTE 439 (OLD YORK ROAD) OVERPASS OF
JV1538''INTERSTATE 83 AT EXIT 36, GO WEST ON ROUTE 439 FOR 0.2 MILES (0.3 KM)
JV1538''TO THE INTERSCTION WITH ROUTE 45 (YORK ROAD) .  TURN LEFT AND GO SOUTH
JV1538''ON ROUTE 45 FOR 1.25 MILES (2.01 KM) TO THE INTERSECTION WITH BENTLEY
JV1538''ROAD ON THE RIGHT.  TURN RIGHT AND GO SOUTHWEST ON BENTLEY ROAD FOR
JV1538''0.8 MILES (1.3 KM) TO A FIVE WAY INTERSECTION WITH KAUFMAN ROAD AND
JV1538''CAMERON MILL ROAD.  BEAR RIGHT AND CONTINUE WEST AND SOUTHWEST ON
JV1538''BENTLEY ROAD FOR 0.9 MILES (1.4 KM) TO THE GUNPOWDER STATE PARK TRAIL
JV1538''CROSSING.  STATION IS LOCATED ABOUT 650 SOUTHWEST ALONG THE GUNPOWDER
JV1538''STATE PARK TRAIL ON THE WEST SIDE OF THE NORTH ABUTMENT WALL OF
JV1538''RAILWAY BRIDGE 31.18 OVER BEETREE RUN. STATION MARK IS A 1 INCH
JV1538''DIAMETER COPPER BOLT SET FLUSH WITH THE ABUTMENT WALL.