1 National Geodetic Survey, Retrieval Date = JULY 1, 2005 GV0470 *********************************************************************** GV0470 DESIGNATION - TIDAL 1 STA 78 GV0470 PID - GV0470 GV0470 STATE/COUNTY- VA/JAMES CITY GV0470 USGS QUAD - NORGE (1984) GV0470 GV0470 *CURRENT SURVEY CONTROL GV0470 ___________________________________________________________________ GV0470* NAD 83(1986)- 37 15 52. (N) 076 52 25. (W) SCALED GV0470* NAVD 88 - 3.599 (meters) 11.81 (feet) ADJUSTED GV0470 ___________________________________________________________________ GV0470 GEOID HEIGHT- -34.87 (meters) GEOID03 GV0470 DYNAMIC HT - 3.597 (meters) 11.80 (feet) COMP GV0470 MODELED GRAV- 979,906.8 (mgal) NAVD 88 GV0470 GV0470 VERT ORDER - FIRST CLASS I GV0470 GV0470.The horizontal coordinates were scaled from a topographic map and have GV0470.an estimated accuracy of +/- 6 seconds. GV0470 GV0470.The orthometric height was determined by differential leveling GV0470.and adjusted by the National Geodetic Survey in June 1991. GV0470 GV0470.The geoid height was determined by GEOID03. GV0470 GV0470.The dynamic height is computed by dividing the NAVD 88 GV0470.geopotential number by the normal gravity value computed on the GV0470.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 GV0470.degrees latitude (g = 980.6199 gals.). GV0470 GV0470.The modeled gravity was interpolated from observed gravity values. GV0470 GV0470; North East Units Estimated Accuracy GV0470;SPC VA S - 1,104,570. 3,644,250. MT (+/- 180 meters Scaled) GV0470 GV0470 SUPERSEDED SURVEY CONTROL GV0470 GV0470 NGVD 29 (??/??/??) 3.834 (m) 12.58 (f) ADJUSTED 1 1 GV0470 GV0470.Superseded values are not recommended for survey control. GV0470.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. GV0470.See file dsdata.txt to determine how the superseded data were derived. GV0470 GV0470_U.S. NATIONAL GRID SPATIAL ADDRESS: 18SUG338258(NAD 83) GV0470_MARKER: DJ = TIDAL STATION DISK GV0470_SETTING: 36 = SET IN A MASSIVE STRUCTURE GV0470_SP_SET: ABUTMENT GV0470_STAMPING: BM 1 1944 GV0470_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL GV0470_SATELLITE: THE SITE LOCATION WAS REPORTED AS NOT SUITABLE FOR GV0470+SATELLITE: SATELLITE OBSERVATIONS - June 09, 2005 GV0470 GV0470 HISTORY - Date Condition Report By GV0470 HISTORY - 1944 MONUMENTED CGS GV0470 HISTORY - 1971 GOOD NGS GV0470 HISTORY - 19971018 GOOD USPSQD GV0470 HISTORY - 20021217 GOOD USPSQD GV0470 HISTORY - 20050609 GOOD VADOT GV0470 GV0470 STATION DESCRIPTION GV0470 GV0470'DESCRIBED BY NATIONAL GEODETIC SURVEY 1971 GV0470'10.2 MI W FROM WILLIAMSBURG. GV0470'ABOUT 1.55 MILES SOUTHWEST ALONG STATE HIGHWAY 31 FROM ITS GV0470'INTERSECTION WITH RICHMOND ROADWAY WILLIAMSBURG, THENCE 8.65 GV0470'MILES WESTERLY ALONG STATE HIGHWAY 5, AT THE EAST END OF THE GV0470'STATE HIGHWAY 5 BRIDGE OVER THE CHICHAHOMINY RIVER, 14.5 FEET GV0470'NORTH OF THE CENTER LINE OF THE HIGHWAY, 1 FOOT NORTH OF A STEEL GV0470'GUARD RAIL, SET ON THE TOP OF THE NORTH END OF THE EAST CONCRETE GV0470'ABUTMENT OF THE BRIDGE AND 10 INCHES ABOVE THE LEVEL OF THE GV0470'HIGHWAY. GV0470 GV0470 STATION RECOVERY (1997) GV0470 GV0470'RECOVERY NOTE BY US POWER SQUADRON 1997 GV0470'RECOVERED IN GOOD CONDITION. GV0470 GV0470 STATION RECOVERY (2002) GV0470 GV0470'RECOVERY NOTE BY US POWER SQUADRON 2002 (EEC) GV0470'RECOVERED IN GOOD CONDITION. GV0470 GV0470 STATION RECOVERY (2005) GV0470 GV0470'RECOVERY NOTE BY VIRGINIA DEPARTMENT OF TRANSPORTATION 2005 (JCA) GV0470'RECOVERED IN GOOD CONDITION.