BL1216 ***********************************************************************
BL1216  DESIGNATION -  X 662
BL1216  PID         -  BL1216
BL1216  STATE/COUNTY-  TX/HARRIS
BL1216  USGS QUAD   -  MAEDAN (1982)
BL1216
BL1216                         *CURRENT SURVEY CONTROL
BL1216  ___________________________________________________________________
BL1216* NAD 83(1986)-  30 00 03.     (N)    095 16 32.     (W)     SCALED
BL1216* NAVD 88     -        26.927  (meters)      88.34   (feet)  ADJUSTED
BL1216  ___________________________________________________________________
BL1216  GEOID HEIGHT-         -27.33  (meters)                     GEOID99
BL1216  DYNAMIC HT  -          26.890 (meters)      88.22  (feet)  COMP
BL1216  MODELED GRAV-     979,303.0   (mgal)                       NAVD 88
BL1216
BL1216  VERT ORDER  -  FIRST     CLASS II
BL1216
BL1216.The horizontal coordinates were scaled from a topographic map and have
BL1216.an estimated accuracy of +/- 6 seconds.
BL1216
BL1216.The orthometric height was determined by differential leveling
BL1216.and adjusted by the National Geodetic Survey in June 1991.
BL1216
BL1216.The geoid height was determined by GEOID99.
BL1216
BL1216.The dynamic height is computed by dividing the NAVD 88
BL1216.geopotential number by the normal gravity value computed on the
BL1216.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
BL1216.degrees latitude (G = 980.6199 gals.).
BL1216
BL1216.The modeled gravity was interpolated from observed gravity values.
BL1216
BL1216;                    North         East    Units  Estimated Accuracy
BL1216;SPC TXSC     - 4,245,940.      959,270.      MT  (+/- 180 meters Scaled)
BL1216
BL1216                          SUPERSEDED SURVEY CONTROL
BL1216
BL1216  NGVD 29     -        26.925  (m)           88.34   (f) ADJUSTED    1 2
BL1216
BL1216.Superseded values are not recommended for survey control.
BL1216.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
BL1216.See file dsdata.txt to determine how the superseded data were derived.
BL1216
BL1216_MARKER: DB = BENCH MARK DISK
BL1216_SETTING: 32 = HEADWALL
BL1216_STAMPING: X 662 1942
BL1216_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
BL1216+STABILITY: SURFACE MOTION
BL1216
BL1216  HISTORY     - Date     Condition        Recov. By
BL1216  HISTORY     - 1942     MONUMENTED       CGS
BL1216  HISTORY     - 1973     GOOD             NGS
BL1216  HISTORY     - 1978     GOOD             NGS
BL1216  HISTORY     - 1987     GOOD             NGS
BL1216  HISTORY     - 19960615 GOOD             USPSQD
BL1216
BL1216                          STATION DESCRIPTION
BL1216
BL1216''DESCRIBED BY NATIONAL GEODETIC SURVEY 1973
BL1216''0.4 MI W FROM HUMBLE.
BL1216''ABOUT 0.4 MILES WEST ALONG HIGHWAY FM 1960 FROM THE HIGHWAY 59
BL1216''OVERPASS OVER FM 1960 AT HUMBLE, 300 FEET ALONG A REVERSE FORK OF A
BL1216''PAVED ROAD ON THE LEFT, SET IN THE WEST END OF THE NORTH HEADWALL OF A
BL1216''4 X 6 FT. BOX CULVERT, 1 FOOT EAST OF THE WEST END OF THE HEADWALL, 6
BL1216''1/2 FEET WEST OF THE EAST END OF THE HEADWALL, 15 FEET NORTH OF THE
BL1216''CENTER LINE OF THE PAVED ROAD.  A STANDARD DISK ABOUT 1 FOOT ABOVE THE
BL1216''LEVEL OF THE HIGHWAY SET IN THE HEADWALL OF A BOX CULVERT.
BL1216
BL1216                          STATION RECOVERY (1978)
BL1216
BL1216''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978
BL1216''RECOVERED IN GOOD CONDITION.
BL1216
BL1216                          STATION RECOVERY (1987)
BL1216
BL1216''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987
BL1216''RECOVERED IN GOOD CONDITION.
BL1216
BL1216                          STATION RECOVERY (1996)
BL1216
BL1216''RECOVERY NOTE BY US POWER SQUADRON 1996
BL1216''RECOVERED IN GOOD CONDITION.