National Geodetic Survey, Retrieval Date = JANUARY 30, 2015 DX0451 *********************************************************************** DX0451 DESIGNATION - CONN DX0451 PID - DX0451 DX0451 STATE/COUNTY- CA/IMPERIAL DX0451 COUNTRY - US DX0451 USGS QUAD - SEVENTEEN PALMS (1974) DX0451 DX0451 *CURRENT SURVEY CONTROL DX0451 ______________________________________________________________________ DX0451* NAD 83(1986) POSITION- 33 20 44. (N) 116 00 45. (W) SCALED DX0451* NAVD 88 ORTHO HEIGHT - -31.233 (meters) -102.47 (feet) READJUSTED DX0451 ______________________________________________________________________ DX0451 GEOID HEIGHT - -33.68 (meters) GEOID12A DX0451 DYNAMIC HEIGHT - -31.20 (meters) -102.4 (feet) COMP DX0451 MODELED GRAVITY - 979,550.3 (mgal) NAVD 88 DX0451 OBS GRAVITY - 979,546.2 (mgal) GRAV_OBS DX0451 DX0451 VERT ORDER - * READJUSTED, SEE BELOW DX0451 DX0451.The horizontal coordinates were scaled from a topographic map and have DX0451.an estimated accuracy of +/- 6 seconds. DX0451. DX0451.The orthometric height was determined by differential leveling DX0451.and adjusted by the NATIONAL GEODETIC SURVEY in February 1993. DX0451 DX0451.* This is a READJUSTED BENCH MARK height. DX0451 DX0451.The height was derived from older observations constrained to new DX0451.heights in a crustal motion area. The height is approximate in DX0451.relation to other heights in its vicinity. DX0451 DX0451.The dynamic height is computed by dividing the NAVD 88 DX0451.geopotential number by the normal gravity value computed on the DX0451.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 DX0451.degrees latitude (g = 980.6199 gals.). DX0451 DX0451.The modeled gravity was interpolated from observed gravity values. DX0451 DX0451.The observed gravity was obtained from relative gravimeter ties DX0451.to the IGSN71 gravity network. DX0451 DX0451; North East Units Estimated Accuracy DX0451;SPC CA 6 - 630,770. 2,022,110. MT (+/- 180 meters Scaled) DX0451 DX0451 SUPERSEDED SURVEY CONTROL DX0451 DX0451 NGVD 29 (??/??/92) -31.910 (m) -104.69 (f) ADJ UNCH 1 1 DX0451 NGVD 29 (??/??/87) -31.915 (m) -104.71 (f) SUPERSEDED 1 1 DX0451 DX0451.Superseded values are not recommended for survey control. DX0451 DX0451.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. DX0451.See file dsdata.txt to determine how the superseded data were derived. DX0451 DX0451_U.S. NATIONAL GRID SPATIAL ADDRESS: 11SNS918900(NAD 83) DX0451 DX0451_MARKER: DD = SURVEY DISK DX0451_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT DX0451_SP_SET: SET IN TOP OF CONCRETE MONUMENT DX0451_STAMPING: TRI CONN CONN 19+1 DX0451_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO DX0451+STABILITY: SURFACE MOTION DX0451 DX0451 HISTORY - Date Condition Report By DX0451 HISTORY - UNK MONUMENTED DOD DX0451 HISTORY - 1968 GOOD CGS DX0451 HISTORY - 1974 GOOD CA-025 DX0451 HISTORY - 1978 GOOD NGS DX0451 DX0451 STATION DESCRIPTION DX0451 DX0451'DESCRIBED BY COAST AND GEODETIC SURVEY 1968 DX0451'4 MI NW FROM TRUCK HAVEN. DX0451'4.0 MILES NORTHWEST ALONG U.S. HIGHWAY 99 FROM THE TRUCK HAVEN DX0451'SERVICE STATION AT TRUCK HAVEN, 0.6 MILE NORTHWEST OF SEA DX0451'VIEW PARK, AT THE RUINS OF A FORMER BUILDING. A STANDARD DISK DX0451'STAMPED TRI CONN CONN 19+1 IN TOP OF CENTER SE ONE OF TWO DX0451'OBLONG CONCRETE FOUNDATIONS 160.9 FEET NORTHEAST OF CENTERLINE DX0451'OF HIGHWAY 14.7 FEET NORTHEAST OF NORTHEAST EDGE OF 8 FOOT DEEP DX0451'PIT. ABOUT 1.5 FEET LOWER THAN THE HIGHWAY AND ABOUT 1 FOOT DX0451'ABOVE GROUND. TO9S R9E 35. NOTE-- U.S. HIGHWAY 99 IS STATE DX0451'HIGHWAY 86. DX0451 DX0451 STATION RECOVERY (1974) DX0451 DX0451'RECOVERY NOTE BY IMPERIAL COUNTY CALIFORNIA 1974 DX0451'RECOVERED IN GOOD CONDITION. DX0451 DX0451 STATION RECOVERY (1978) DX0451 DX0451'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978 DX0451'RECOVERED IN GOOD CONDITION.