1 National Geodetic Survey, Retrieval Date = DECEMBER 2, 2002 HT0240 *********************************************************************** HT0240 DESIGNATION - M 148 HT0240 PID - HT0240 HT0240 STATE/COUNTY- CA/ALAMEDA HT0240 USGS QUAD - SAN LEANDRO (1993) HT0240 HT0240 *CURRENT SURVEY CONTROL HT0240 ___________________________________________________________________ HT0240* NAD 83(1998)- 37 42 27.54547(N) 122 08 50.41715(W) ADJUSTED HT0240* NAVD 88 - 12.335 (meters) 40.47 (feet) ADJUSTED HT0240 ___________________________________________________________________ HT0240 EPOCH DATE - 2000.86 HT0240 X - -2,688,333.855 (meters) COMP HT0240 Y - -4,277,716.141 (meters) COMP HT0240 Z - 3,879,810.806 (meters) COMP HT0240 LAPLACE CORR- 3.13 (seconds) DEFLEC99 HT0240 ELLIP HEIGHT- -20.06 (meters) GPS OBS HT0240 GEOID HEIGHT- -32.35 (meters) GEOID99 HT0240 DYNAMIC HT - 12.327 (meters) 40.44 (feet) COMP HT0240 MODELED GRAV- 979,958.3 (mgal) NAVD 88 HT0240 HT0240 HORZ ORDER - B HT0240 VERT ORDER - FIRST CLASS II HT0240 ELLP ORDER - FOURTH CLASS I HT0240 HT0240.The horizontal coordinates were established by GPS observations HT0240.and adjusted by the National Geodetic Survey in November 2002. HT0240.This is a SPECIAL STATUS position. See SPECIAL STATUS under the HT0240.DATUM ITEM on the data sheet items page. HT0240.The horizontal coordinates are valid at the epoch date displayed above. HT0240.The epoch date for horizontal control is a decimal equivalence HT0240.of Year/Month/Day. HT0240 HT0240.The orthometric height was determined by differential leveling HT0240.and adjusted by the National Geodetic Survey in June 1991. HT0240 HT0240.The X, Y, and Z were computed from the position and the ellipsoidal ht. HT0240 HT0240.The Laplace correction was computed from DEFLEC99 derived deflections. HT0240 HT0240.The ellipsoidal height was determined by GPS observations HT0240.and is referenced to NAD 83. HT0240 HT0240.The geoid height was determined by GEOID99. HT0240 HT0240.The dynamic height is computed by dividing the NAVD 88 HT0240.geopotential number by the normal gravity value computed on the HT0240.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 HT0240.degrees latitude (g = 980.6199 gals.). HT0240 HT0240.The modeled gravity was interpolated from observed gravity values. HT0240 HT0240; North East Units Scale Converg. HT0240;SPC CA 3 - 635,304.503 1,854,755.483 MT 0.99992946 -1 00 30.8 HT0240;SPC CA 3 - 2,084,328.19 6,085,143.61 sFT 0.99992946 -1 00 30.8 HT0240;UTM 10 - 4,173,721.222 575,158.352 MT 0.99966958 +0 31 17.5 HT0240 HT0240 SUPERSEDED SURVEY CONTROL HT0240 HT0240 NAD 83(1992)- 37 42 27.54266(N) 122 08 50.41485(W) AD(1997.30) 1 HT0240 ELLIP HT - -20.06 (m) GP(1997.30) 4 1 HT0240 NAD 83(1992)- 37 42 27.54100(N) 122 08 50.41387(W) AD(1995.42) 1 HT0240 ELLIP HT - -20.00 (m) GP(1995.42) 4 1 HT0240 NGVD 29 - 11.510 (m) 37.76 (f) ADJUSTED 1 2 HT0240 HT0240.Superseded values are not recommended for survey control. HT0240.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. HT0240.See file dsdata.txt to determine how the superseded data were derived. HT0240 HT0240_U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEG7515873721(NAD 83) HT0240_MARKER: DB = BENCH MARK DISK HT0240_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT HT0240_STAMPING: M 148 1933 HT0240_MARK LOGO: CGS HT0240_MAGNETIC: N = NO MAGNETIC MATERIAL HT0240_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO HT0240+STABILITY: SURFACE MOTION HT0240_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR HT0240+SATELLITE: SATELLITE OBSERVATIONS - January 15, 2001 HT0240 HT0240 HISTORY - Date Condition Report By HT0240 HISTORY - 1933 MONUMENTED CGS HT0240 HISTORY - 1974 GOOD NGS HT0240 HISTORY - 1977 GOOD NGS HT0240 HISTORY - 1983 GOOD NGS HT0240 HISTORY - 19881003 GOOD NGS HT0240 HISTORY - 19950915 GOOD NGS HT0240 HISTORY - 20000607 GOOD NGS HT0240 HISTORY - 20010115 GOOD FRAME HT0240 HISTORY - 20010531 POOR CA-001 HT0240 HT0240 STATION DESCRIPTION HT0240 HT0240'DESCRIBED BY NATIONAL GEODETIC SURVEY 1974 HT0240'IN SAN LEANDRO. HT0240'1.4 MILES SE ALONG THE SOUTHERN PACIFIC COMPANY RAILROAD FROM HT0240'THE STATION AT SAN LEANDRO, IN T3S, R3W, 7 FEET NW OF THE SW HT0240'PRODUCTION OF THE CENTERLINE OF 139TH AVE. (FORMERLY WEST AVE. HT0240'141), 46.0 FEET SW OF THE SW RAIL OF THE MAINLINE TRACK, 36.5 HT0240'FEET ESE FROM A POWER LINE POLE WITH 2 GUY WIRES, BETWEEN HT0240'THE RAILS OF THE MOST SW SPUR TRACK OF 3 SPUR TRACKS SW OF THE HT0240'MAINLINE TRACK, SET IN THE TOP OF A CONCRETE POST PROJECTING HT0240'0.2 FOOT ABOVE THE RAILROAD TIES. HT0240 HT0240 STATION RECOVERY (1977) HT0240 HT0240'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 HT0240'1.4 MILES SOUTHEAST ALONG THE SOUTHERN PACIFIC COMPANY RAILROAD FROM HT0240'THE STATION AT SAN LEANDRO, 2 FT NORTHWEST OF THE PROJECTING HT0240'CENTER LINE OF 139TH AVE., 46 FEET SOUTHWEST OF THE SOUTHWEST RAIL HT0240'OF THE MAIN TRACK, 19.3 FT EAST OF POWER LINE POLE NUMBER 6198, HT0240'42.8 FT NORTH-NORTHWEST OF SWITCHSTAND 2694, BETWEEN THE RAILS HT0240'OF A SPUR TRACK LEADING TO THE S END OF THE MONTGOMERY WARD LOADING HT0240'DOCKS AND PROJECTING 0.2 FT ABOVE THE RAILROAD TIES. HT0240 HT0240 STATION RECOVERY (1983) HT0240 HT0240'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 HT0240'RECOVERED IN GOOD CONDITION. HT0240 HT0240 STATION RECOVERY (1988) HT0240 HT0240'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1988 HT0240'RECOVERED IN GOOD CONDITION WITH THE FOLLOWING EXCEPTION. ADD--4.1 M HT0240'(13.5 FT) NORTHEAST OF A FENCE. HT0240 HT0240 STATION RECOVERY (1995) HT0240 HT0240'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1995 (JDD) HT0240'THE STATION WAS RECOVERED. TO REACH THE STATION FROM THE INTERSECTION HT0240'OF INTERSTATE HIGHWAY 880 AND WASHINGTON AVENUE IN SAN LEANDRO, GO HT0240'NORTH THEN NORTHWEST ON WASHINGTON AVENUE FOR 1.3 MI (2.1 KM) TO THE HT0240'INTERSECTION OF 139TH STREET. TURN LEFT AND GO SOUTHWEST ON 139TH HT0240'STREET FOR 0.1 MI (0.2 KM) TO THE END OF 139TH STREET AND A HT0240'CUL-DE-SAC. THE STATION IS ABOUT 200 FT (61.0 M) SOUTHWEST OF THE END HT0240'OF 139TH STREET ACROSS THE MAIN RAILROAD TRACK AND BETWEEN THE RAILS HT0240'OF AN ABABDONED RAILROAD SIDING. HT0240 HT0240 STATION RECOVERY (2000) HT0240 HT0240'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 2000 (GAS) HT0240'IN SAN LEANDRO, AT THE INTERSECTION OF WASHINGTON AND 139TH AVENUES, HT0240'300.0 M (984.2 FT) SOUTHWEST OF THE CENTER OF WASHINGTON AVENUE, 14.1 HT0240'M (46.3 FT) SOUTHWEST OF THE SOUTHWEST RAIL OF THE MAIN TRACK OF THE HT0240'SOUTHERN PACIFIC RAILROAD, 5.9 M (19.4 FT) EAST OF UTILITY POLE NUMBER HT0240'6198 WITH 2 GUY CABLES, 4.1 M (13.5 FT) NORTHEAST OF A FENCE, 0.6 M HT0240'(2.0 FT) NORTHWEST OF THE EXTENDED CENTER OF 139TH AVENUE, 0.3 M (1.0 HT0240'FT) ABOVE THE LEVEL OF 139TH AVENUE, AND THE MONUMENT IS FLUSH WITH HT0240'THE GROUND SURFACE. NOTE--THE MONUMENT IS ON THE RAILROAD HT0240'RIGHT-OF-WAY. HT0240 HT0240 STATION RECOVERY (2001) HT0240 HT0240'RECOVERY NOTE BY FRAME SURVEYING AND MAPPING 2001 (JHF) HT0240'RECOVERED AS DESCRIBED. HT0240 HT0240 STATION RECOVERY (2001) HT0240 HT0240'RECOVERY NOTE BY ALAMEDA COUNTY CALIFORNIA 2001 (RAM) HT0240'STATION M 148 FOUND LEANING SOUTHEASTERLY APPROXIMATELY PARALLEL WITH HT0240'THE TRACK. ALSO WESTERLY OF THE MARK A TREE HAS BEEN PLANTED ON HT0240'PRIVATE PROPERTY THAT WILL EFFECTIVELY TAKE OUT THE WESTERN SATELLITE HT0240'CONSTELLATION. STATION S 1197 (HT0223) WAS LOCATED TO VERIFY THE HT0240'DISTURBANCE.