1 National Geodetic Survey, Retrieval Date = OCTOBER 3, 2005 AE7867 *********************************************************************** AE7867 HT_MOD - This is a Height Modernization Survey Station. AE7867 TIDAL BM - This is a Tidal Bench Mark. AE7867 DESIGNATION - 941 5144 J TIDAL AE7867 PID - AE7867 AE7867 STATE/COUNTY- CA/CONTRA COSTA AE7867 USGS QUAD - VINE HILL (1980) AE7867 AE7867 *CURRENT SURVEY CONTROL AE7867 ___________________________________________________________________ AE7867* NAD 83(1992)- 38 03 09.55502(N) 122 02 09.14867(W) ADJUSTED AE7867* NAVD 88 - 2.59 (meters) 8.5 (feet) GPS OBS AE7867 ___________________________________________________________________ AE7867 EPOCH DATE - 1997.30 AE7867 X - -2,667,530.758 (meters) COMP AE7867 Y - -4,262,999.754 (meters) COMP AE7867 Z - 3,910,029.605 (meters) COMP AE7867 LAPLACE CORR- -0.80 (seconds) DEFLEC99 AE7867 ELLIP HEIGHT- -29.53 (meters) (07/10/98) GPS OBS AE7867 GEOID HEIGHT- -32.16 (meters) GEOID03 AE7867 AE7867 HORZ ORDER - FIRST AE7867 ELLP ORDER - FOURTH CLASS I AE7867 AE7867.The horizontal coordinates were established by GPS observations AE7867.and adjusted by the National Geodetic Survey in July 1998. AE7867.The horizontal coordinates are valid at the epoch date displayed above. AE7867.The epoch date for horizontal control is a decimal equivalence AE7867.of Year/Month/Day. AE7867 AE7867.The orthometric height was determined by GPS observations and a AE7867.high-resolution geoid model using precise GPS observation and AE7867.processing techniques. AE7867 AE7867.This Tidal Bench Mark is designated as VM 999 AE7867.by the Center for Operational Oceanographic Products and Services. AE7867 AE7867.The X, Y, and Z were computed from the position and the ellipsoidal ht. AE7867 AE7867.The Laplace correction was computed from DEFLEC99 derived deflections. AE7867 AE7867.The ellipsoidal height was determined by GPS observations AE7867.and is referenced to NAD 83. AE7867 AE7867.The geoid height was determined by GEOID03. AE7867 AE7867; North East Units Scale Factor Converg. AE7867;SPC CA 3 - 673,422.946 1,865,210.598 MT 0.99994299 -0 56 25.1 AE7867;SPC CA 3 - 2,209,388.45 6,119,445.10 sFT 0.99994299 -0 56 25.1 AE7867;UTM 10 - 4,212,095.834 584,588.041 MT 0.99968812 +0 35 39.5 AE7867 AE7867! - Elev Factor x Scale Factor = Combined Factor AE7867!SPC CA 3 - 1.00000463 x 0.99994299 = 0.99994762 AE7867!UTM 10 - 1.00000463 x 0.99968812 = 0.99969275 AE7867 AE7867 SUPERSEDED SURVEY CONTROL AE7867 AE7867 NAD 83(1992)- 38 03 09.55461(N) 122 02 09.14876(W) AD(1997.30) 1 AE7867 ELLIP H (03/20/98) -29.43 (m) GP(1997.30) 3 2 AE7867 AE7867.Superseded values are not recommended for survey control. AE7867.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. AE7867.See file dsdata.txt to determine how the superseded data were derived. AE7867 AE7867_U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH8458812096(NAD 83) AE7867_MARKER: DJ = TIDAL STATION DISK AE7867_SETTING: 46 = COPPER-CLAD STEEL ROD W/O SLEEVE (10 FT.+) AE7867_STAMPING: 5144 J 1976 AE7867_MARK LOGO: NOS AE7867_PROJECTION: PROJECTING 10 CENTIMETERS AE7867_MAGNETIC: N = NO MAGNETIC MATERIAL AE7867_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL AE7867_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR AE7867+SATELLITE: SATELLITE OBSERVATIONS - June 26, 2002 AE7867_ROD/PIPE-DEPTH: 10 meters AE7867 AE7867 HISTORY - Date Condition Report By AE7867 HISTORY - 1976 MONUMENTED NOS AE7867 HISTORY - 19970401 GOOD NGS AE7867 HISTORY - 20020626 GOOD NGS AE7867 AE7867 STATION DESCRIPTION AE7867 AE7867'DESCRIBED BY NATIONAL OCEAN SERVICE 1976 AE7867'THE STATION IS LOCATED ON THE PROPERTY OF THE NAVAL WEAPONS STATION AE7867'CONCORD LOCATED IN PORT CHICAGO. TO REACH THE STATION FROM THE AE7867'INTERSECTION OF STATE HIGHWAY 4 AND PORT CHICAGO HIGHWAY IN NORTH AE7867'CONCORD GO NORTHERLY ON PORT CHICAGO HIGHWAY FOR 0.8 MI (1.3 KM) TO A AE7867'SIDE ROAD LEFT WHICH IS THE ENTRANCE TO THE NAVAL WEAPONS STATION AE7867'CONCORD. TURN LEFT AND THEN TURN RIGHT IMMEDIATELY AND GO 0.05 MI AE7867'(0.08 KM) TO THE SECURITY GATE AND ENTRANCE TO THE WEAPONS STATION. AE7867'CONTINUE NORTHERLY FOR ABOUT 2.05 MI (3.30 KM) TO THE INTERSECTION OF AE7867'TAYLOR ROAD AND JOHNSON ROAD. TURN LEFT ON JOHNSON ROAD AND GO NORTH AE7867'FOR ABOUT 0.3 MI (0.5 KM) TO THE STATION ON THE LEFT. THE STATION IS AE7867'ABOUT 107 FT (32.6 M) NORTHWEST OF FIRE HYDRANT 216, 67 FT (20.4 M) AE7867'SOUTHWEST OF THE MOST WESTERLY RAILROAD TRACK, 58 FT (17.7 M) AE7867'SOUTHEAST OF A UTILITY POLE, 38 FT (11.6 M) SOUTHWEST OF THE AE7867'CENTERLINE OF JOHNSON ROAD AND 3 FT (0.9 M) SOUTHEAST OF A WITNESS AE7867'POST. THE STATION IS ENCASED IN A 4 IN PVC PIPE. AE7867 AE7867 STATION RECOVERY (1997) AE7867 AE7867'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1997 AE7867'RECOVERED IN GOOD CONDITION. AE7867 AE7867 STATION RECOVERY (2002) AE7867 AE7867'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 2002 (MEI) AE7867'RECOVERED IN GOOD CONDITION.