PROGRAM = datasheet95, VERSION = 8.12.5.20 Starting Datasheet Retrieval... 1 National Geodetic Survey, Retrieval Date = JULY 4, 2025 23:12:02 EDT JV6581 *********************************************************************** JV6581 DESIGNATION - LINTH JV6581 PID - JV6581 JV6581 STATE/COUNTY- MD/ANNE ARUNDEL JV6581 COUNTRY - US JV6581 USGS QUAD - RELAY (2016) JV6581 JV6581 *CURRENT SURVEY CONTROL JV6581 ______________________________________________________________________ JV6581* NAD 83(1991) POSITION- 39 12 20.28673(N) 076 38 29.25865(W) NO CHECK JV6581* NAVD 88 ORTHO HEIGHT - 54.68 (meters) 179.4 (feet) RESET JV6581 ______________________________________________________________________ JV6581 GEOID HEIGHT - -32.750 (meters) GEOID18 JV6581 LAPLACE CORR - -5.39 (seconds) DEFLEC18 JV6581 HORZ ORDER - THIRD JV6581 VERT ORDER - THIRD JV6581 JV6581.The horizontal coordinates were established by classical geodetic methods JV6581.and adjusted by the National Geodetic Survey in January 1992. JV6581 JV6581.No horizontal observational check was made to the station. JV6581 JV6581.The orthometric height was computed from unverified reset data. JV6581 JV6581.No vertical observational check was made to the station. JV6581 JV6581.Significant digits in the geoid height do not necessarily reflect accuracy. JV6581.GEOID18 height accuracy estimate available here. JV6581 JV6581.Click photographs - Photos may exist for this station. JV6581 JV6581.The Laplace correction was computed from DEFLEC18 derived deflections. JV6581 JV6581. The following values were computed from the NAD 83(1991) position. JV6581 JV6581; North East Units Scale Factor Converg. JV6581;SPC MD - 170,895.162 430,967.744 MT 0.99996638 +0 13 30.1 JV6581;SPC MD - 560,678.54 1,413,933.34 sFT 0.99996638 +0 13 30.1 JV6581;UTM 18 - 4,340,880.031 358,271.437 MT 0.99984733 -1 02 15.9 JV6581 JV6581! - Elev Factor x Scale Factor = Combined Factor JV6581!SPC MD - 0.99999656 x 0.99996638 = 0.99996294 JV6581!UTM 18 - 0.99999656 x 0.99984733 = 0.99984389 JV6581 JV6581_U.S. NATIONAL GRID SPATIAL ADDRESS: 18SUJ5827140880(NAD 83) JV6581 JV6581 SUPERSEDED SURVEY CONTROL JV6581 JV6581 NAD 83(1986)- 39 12 20.28357(N) 076 38 29.26809(W) AD( ) 3 JV6581 NGVD 29 (11/18/05) 54.92 (m) 180.2 (f) RESET 3 JV6581 NGVD 29 54.92 (m) 180.2 (f) LEVELING 3 JV6581 JV6581.Superseded values are not recommended for survey control. JV6581 JV6581.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. JV6581.See file dsdata.pdf to determine how the superseded data were derived. JV6581 JV6581_MARKER: DD = SURVEY DISK JV6581_SETTING: 38 = SET IN THE ABUTMENT OR PIER OF A LARGE BRIDGE JV6581_SP_SET: SIDEWALK ON BRIDGE ABUTMENT JV6581_STAMPING: LINTH 1988 JV6581_MARK LOGO: MDSHA JV6581_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL JV6581_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR JV6581+SATELLITE: SATELLITE OBSERVATIONS - October 05, 2022 JV6581 JV6581 HISTORY - Date Condition Report By JV6581 HISTORY - 1988 MONUMENTED MDSHA JV6581 HISTORY - 20020217 GOOD USPSQD JV6581 HISTORY - 20221005 GOOD WTBALL JV6581 JV6581 STATION DESCRIPTION JV6581 JV6581'DESCRIBED BY MARYLAND DOT HIGHWAY ADMINISTRATION 1988 JV6581'THE STATION IS LOCATED ABOUT 9.8 KM (6.10 MI) SOUTH OF THE APPROXIMATE JV6581'CENTER OF BALTIMORE, 1.5 KM (0.95 MI) EAST OF LINTHICUM AND IN THE JV6581'SOUTH END OF THE EAST SIDEWALK FOR THE OVERPASS BRIDGE WHERE STATE JV6581'HIGHWAY 648 CROSSES INTERSTATE HIGHWAY 695. OWNERSHIP--ROAD JV6581'RIGHT-OF-WAY. JV6581'NO TO REACH IS NECESSARY. JV6581'THE DISK PROJECTS ABOUT 0.3 M (1.0 FT) ABOVE THE BRIDGE DECK. IT IS JV6581'0.8 M (2.6 FT) SOUTH OF THE MOST SOUTHERLY EXPANSION JOINT ON THE JV6581'BRIDGE, 5.0 M (16.4 FT) EAST OF THE CENTER OF THE NORTH BOUND LANE OF JV6581'STATE HIGHWAY 648, 9.4 M (30.8 FT) NORTH OF THE SOUTH END OF THE EAST JV6581'PARAPET WALL AND 18.8 M (61.7 FT) NORTH FROM THE CENTER OF LARGE DROP JV6581'INLET. JV6581 JV6581 STATION RECOVERY (2002) JV6581 JV6581'RECOVERY NOTE BY US POWER SQUADRON 2002 (CRA) JV6581'RECOVERED IN GOOD CONDITION. JV6581 JV6581 STATION RECOVERY (2022) JV6581 JV6581'RECOVERY NOTE BY THE WILSON T BALLARD COMPANY 2022 (NAW) JV6581'RECOVERED IN GOOD CONDITION.
Log: Recovered in good condition on Sunday 7/25/2025 at 2:26pm EDT. In spite of the sidewalks, this area is not very walkable, but it’s still possible to reach the mark relatively safely. The GPS coordinates seemed pretty close, and the MDOT locating instructions are still accurate. The disc is flush with the sidewalk and easy to spot. This is the first benchmark disc that I’ve logged since the geocaching.com benchmarking sunset (I have logged a few spires and domes in the meantime). Benchmarking has always been sort of a side game to geocaching for me, but I still find it more interesting than, say, waymarking or Munzee. Maybe I missed my calling to be a surveyor?
There is another nearby mark, JV6578, that I would like to look for during the non-growing season. I walked by it today, but the grass was a little high (and the sun a little too hot) for me to want to go wandering into the field where it is located.


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