1 National Geodetic Survey, Retrieval Date = DECEMBER 2, 2002 JV6658 *********************************************************************** JV6658 CBN - This is a Cooperative Base Network Control Station. JV6658 DESIGNATION - SWEENY JV6658 PID - JV6658 JV6658 STATE/COUNTY- MD/BALTIMORE JV6658 USGS QUAD - CURTIS BAY (1974) JV6658 JV6658 *CURRENT SURVEY CONTROL JV6658 ___________________________________________________________________ JV6658* NAD 83(1991)- 39 13 52.39362(N) 076 30 34.74855(W) ADJUSTED JV6658* NAVD 88 - 2.118 (meters) 6.95 (feet) ADJUSTED JV6658 ___________________________________________________________________ JV6658 X - 1,154,069.220 (meters) COMP JV6658 Y - -4,810,614.334 (meters) COMP JV6658 Z - 4,012,213.856 (meters) COMP JV6658 LAPLACE CORR- -2.07 (seconds) DEFLEC99 JV6658 ELLIP HEIGHT- -30.85 (meters) GPS OBS JV6658 GEOID HEIGHT- -32.99 (meters) GEOID99 JV6658 DYNAMIC HT - 2.117 (meters) 6.95 (feet) COMP JV6658 MODELED GRAV- 980,098.2 (mgal) NAVD 88 JV6658 JV6658 HORZ ORDER - B JV6658 VERT ORDER - SECOND CLASS I JV6658 ELLP ORDER - FOURTH CLASS I JV6658 JV6658.The horizontal coordinates were established by GPS observations JV6658.and adjusted by the National Geodetic Survey in October 1991. JV6658 JV6658.The orthometric height was determined by differential leveling JV6658.and adjusted by the National Geodetic Survey in August 1994. JV6658 JV6658.The X, Y, and Z were computed from the position and the ellipsoidal ht. JV6658 JV6658.The Laplace correction was computed from DEFLEC99 derived deflections. JV6658 JV6658.The ellipsoidal height was determined by GPS observations JV6658.and is referenced to NAD 83. JV6658 JV6658.The geoid height was determined by GEOID99. JV6658 JV6658.The dynamic height is computed by dividing the NAVD 88 JV6658.geopotential number by the normal gravity value computed on the JV6658.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 JV6658.degrees latitude (g = 980.6199 gals.). JV6658 JV6658.The modeled gravity was interpolated from observed gravity values. JV6658 JV6658; North East Units Scale Converg. JV6658;SPC MD - 173,788.427 442,336.941 MT 0.99996904 +0 18 27.9 JV6658;SPC MD - 570,170.86 1,451,233.78 sFT 0.99996904 +0 18 27.9 JV6658;UTM 18 - 4,343,521.679 369,700.034 MT 0.99980905 -0 57 17.7 JV6658 JV6658 SUPERSEDED SURVEY CONTROL JV6658 JV6658 ELLIP HT - -30.95 (m) GP( ) 4 1 JV6658 NGVD 29 - 2.40 (m) 7.9 (f) LEVELING 3 JV6658 JV6658.Superseded values are not recommended for survey control. JV6658.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. JV6658.See file dsdata.txt to determine how the superseded data were derived. JV6658 JV6658_U.S. NATIONAL GRID SPATIAL ADDRESS: 18SUJ6970043522(NAD 83) JV6658_MARKER: DH = HORIZONTAL CONTROL DISK JV6658_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT JV6658_STAMPING: SWEENY 1990 JV6658_MARK LOGO: MDDT JV6658_MAGNETIC: O = OTHER; SEE DESCRIPTION JV6658_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO JV6658+STABILITY: SURFACE MOTION JV6658_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR JV6658+SATELLITE: SATELLITE OBSERVATIONS - October 31, 2002 JV6658 JV6658 HISTORY - Date Condition Report By JV6658 HISTORY - 1990 MONUMENTED MDDT JV6658 HISTORY - 19901207 GOOD NGS JV6658 HISTORY - 19911112 GOOD MDSHA JV6658 HISTORY - 19930511 GOOD NOS JV6658 HISTORY - 19950201 GOOD MCCRON JV6658 HISTORY - 19970811 GOOD DMW JV6658 HISTORY - 19980723 GOOD DMW JV6658 HISTORY - 19990401 GOOD AMTHOM JV6658 HISTORY - 19990902 GOOD MDSHA JV6658 HISTORY - 20000327 GOOD MDSHA JV6658 HISTORY - 20021031 GOOD WR JV6658 JV6658 STATION DESCRIPTION JV6658 JV6658'DESCRIBED BY MARYLAND DEPARTMENT OF TRANSPORTATION 1990 JV6658'THE STATION IS LOCATED ABOUT 5.63 KM (3.50 MI) SOUTHWEST OF EDGEMERE, JV6658'12.07 KM (7.50 MI) NORTHEAST OF GLEN BURNIE, 3.22 KM (2.00 MI) JV6658'SOUTHEAST OF DUNDALK, AND ON THE GROUNDS OF THE MARYLAND TOLL JV6658'FACILITIES ADMINISTRATION. THE PROPERTY IS OWNED BY THE STATE OF JV6658'MARYLAND (TOLL FACILITIES ADMINISTRATION). JV6658'TO REACH THE STATION FROM THE WESTBOUND TOLL BOOTHS AT THE FRANCIS JV6658'SCOTT KEY BRIDGE. GO WEST PAST THE TOLL BOOTHS FOR 100 FT (30.5 M) TO JV6658'AN ENTRANCE ON THE RIGHT TO THE TOLL FACILITIES ADMINISTRATION JV6658'COMPLEX. TURN RIGHT AND GO NORTH FOR 100 FT (30.5 M) TO A STOP SIGN JV6658'AND AN AUTOMATIC GATE. PROCEED THROUGH THE GATE AND TURN RIGHT ONTO A JV6658'MACADAM SERVICE ROAD AND GO EAST FOR 0.15 MI (0.24 KM) JUST PAST THE JV6658'END OF THE MACADAM PARKING LOT TO A GRAVEL AREA AND THE STATION ON JV6658'THE LEFT. JV6658'THE STATION MARK IS A STANDARD NGS DISK SET IN THE TOP OF A 0.30 M JV6658'(0.98 FT) ROUND CONCRETE MONUMENT WHICH IS FLUSH WITH THE SURFACE OF JV6658'THE GROUND. IT IS 25.76 M (84.51 FT) SOUTHEAST OF THE NORTHEAST JV6658'CORNER OF THE MACADAM PARKING LOT, 6.10 M (20.01 FT) EAST OF THE JV6658'NORTHEAST CORNER OF A GRATE DROP INLET, 29.11 M (95.51 FT) NORTHEAST JV6658'OF A TELEPHONE BOX ON A MACADAM ISLAND, AND 52.12 M (171.00 FT) JV6658'NORTHWEST OF A LIGHT POLE NUMBERED 4,24,26,28,06,1000. JV6658 JV6658 STATION RECOVERY (1990) JV6658 JV6658'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1990 JV6658'STATION IS LOCATED ABOUT 13 KM (8.1 MI) SOUTHEAST OF DOWNTOWN JV6658'BALTIMORE, 3.2 KM (2.0 MI) SOUTH OF DUNDALK, ALONG INTERSTATE HIGHWAY JV6658'695 (PATAPSCO FREEWAY), NEAR THE NORTHEAST END OF THE FRANCIS SCOTT JV6658'KEY BRIDGE, ON THE GROUNDS OF THE MARYLAND TOLL FACILITIES JV6658'ADMINISTRATION, AND IN A SMALL GRASS PLOT ON THE EAST SIDE OF A JV6658'PARKING LOT AT THE EAST END OF THE BUILDING COMPLEX. JV6658'OWNERSHIP--STATE TOLL FACILITIES ADMINISTRATION, C/O SUPERINTENDENT JV6658'OF BRIDGES, PHONE 301-563-7170. JV6658'NOTE--BECAUSE OF ONE-WAY ROADS, TWO SEPARATE ROUTES ARE GIVEN. JV6658'TO REACH FROM THE WESTBOUND TOLL BOOTHS AT THE NORTHEAST END OF THE JV6658'FRANCIS SCOTT KEY BRIDGE, GO WEST PAST THE TOLL BOOTHS FOR 30 M JV6658'(98.4 FT) TO A LANE RIGHT LEADING TO THE COMPLEX. BEAR RIGHT FOR 30 JV6658'M (98.4 FT) TO A STOP SIGN AT AUTOMATIC GATE. PASS THROUGH GATE AND JV6658'BEAR RIGHT ON SERVICE ROAD, EASTERLY, FOR 0.24 KM (0.15 MI) TO THE JV6658'EAST END OF THE MACADAM PARKING LOT ON THE LEFT AND STATION ON THE JV6658'LEFT. JV6658'TO REACH FROM THE EASTBOUND TOLL BOOTHS AT THE NORTHEAST END OF THE JV6658'BRIDGE, GO NORTHEAST ON HIGHWAY 695 FOR 0.41 KM (0.25 MI) TO RAMP AT JV6658'EXIT 44. BEAR RIGHT ON RAMP (CIRCLING UNDER HIGHWAY) FOR 0.62 KM JV6658'(0.39 MI) TO A ROAD LEFT. TURN LEFT, SOUTHWESTERLY, ON SERVICE ROAD JV6658'FOR 0.58 KM (0.36 MI) TO THE PARKING LOT AND STATION ON THE RIGHT. JV6658'STATION MARK IS SET IN THE TOP OF A 30-CM ROUND CONCRETE POST 1 CM JV6658'BELOW GROUND. IT IS 34.4 M (112.9 FT) NORTH OF THE ROAD CENTER, 10.7 JV6658'M (35.1 FT) EAST OF THE EAST EDGE OF THE PARKING LOT, 25.6 M JV6658'(84.0 FT) SOUTH-SOUTHEAST OF THE NORTHEAST CORNER OF THE LOT, 6.4 M JV6658'(21.0 FT) EAST-NORTHEAST OF THE CENTER OF A RECTANGULAR CATCH BASIN, JV6658'10.7 M (35.1 FT) SOUTHWEST OF A FIBERGLASS WITNESS POST IN A FENCE JV6658'LINE, 0.4 M (1.3 FT) NORTH OF A FIBERGLASS WITNESS POST, AND ABOUT JV6658'133 M (436.4 FT) ALONG THE ROAD FROM THE EAST END OF THE JV6658'ADMINISTRATION BUILDING. JV6658'NOTE--CONTACT C.S. HURTT, STATE TRANSPORTATION AUTHORITY JV6658'(301-563-7198) BEFORE WORK. HE WILL MAKE SURE THAT NO VEHICLES ARE JV6658'PARKED AT STATION AND WILL CLEAR YOU WITH SECURITY. HE WILL ATTEMPT JV6658'TO GET STATE TO ERECT A PERMANENT BARRICADE AROUND THE STATION. JV6658'DESCRIBED BY G.R.HEID. JV6658 JV6658 STATION RECOVERY (1991) JV6658 JV6658'RECOVERY NOTE BY MARYLAND DOT HIGHWAY ADMINISTRATION 1991 JV6658'RECOVERED IN GOOD CONDITION. JV6658 JV6658 STATION RECOVERY (1993) JV6658 JV6658'RECOVERY NOTE BY NATIONAL OCEAN SERVICE 1993 JV6658'RECOVERED IN GOOD CONDITION. JV6658 JV6658 STATION RECOVERY (1995) JV6658 JV6658'RECOVERY NOTE BY J R MCCRONE JR INCORPORATED 1995 (HAS) JV6658'RECOVERED AS DESCRIBED. JV6658 JV6658 STATION RECOVERY (1997) JV6658 JV6658'RECOVERY NOTE BY DAFT MCCUNE WALKER INCORPORATED 1997 (DMM) JV6658'RECOVERED AS DESCRIBED. JV6658 JV6658 STATION RECOVERY (1998) JV6658 JV6658'RECOVERY NOTE BY DAFT MCCUNE WALKER INCORPORATED 1998 (DMM) JV6658'RECOVERED IN GOOD CONDITION. JV6658 JV6658 STATION RECOVERY (1999) JV6658 JV6658'RECOVERY NOTE BY A MORTON THOMAS AND ASSOCIATES 1999 JV6658'RECOVERED AS DESCRIBED. JV6658 JV6658 STATION RECOVERY (1999) JV6658 JV6658'RECOVERY NOTE BY MARYLAND DOT HIGHWAY ADMINISTRATION 1999 (DMM) JV6658'RECOVERED AS DESCRIBED JV6658 JV6658 STATION RECOVERY (2000) JV6658 JV6658'RECOVERY NOTE BY MARYLAND DOT HIGHWAY ADMINISTRATION 2000 (SFK) JV6658'RECOVERED AS DESCRIBED. JV6658 JV6658 STATION RECOVERY (2002) JV6658 JV6658'RECOVERY NOTE BY WHITMAN, REQUARDT & ASSOCIATES 2002 (RTD) JV6658'RECOVERED IN GOOD CONDITION.