HT0697 ***********************************************************************
HT0697  TIDAL BM    -  This is a Tidal Bench Mark.
HT0697  DESIGNATION -  941 4290 TIDAL 174
HT0697  PID         -  HT0697
HT0697  STATE/COUNTY-  CA/SAN FRANCISCO
HT0697  USGS QUAD   -  SAN FRANCISCO NORTH (1995)
HT0697
HT0697                         *CURRENT SURVEY CONTROL
HT0697  ___________________________________________________________________
HT0697* NAD 83(1986)-  37 48 29.     (N)    122 28 14.     (W)     SCALED
HT0697* NAVD 88     -         5.029  (meters)      16.50   (feet)  ADJUSTED
HT0697  ___________________________________________________________________
HT0697  GEOID HEIGHT-         -32.46  (meters)                     GEOID99
HT0697  DYNAMIC HT  -           5.026 (meters)      16.49  (feet)  COMP
HT0697  MODELED GRAV-     979,981.4   (mgal)                       NAVD 88
HT0697
HT0697  VERT ORDER  -  FIRST     CLASS I
HT0697
HT0697.The horizontal coordinates were scaled from a topographic map and have
HT0697.an estimated accuracy of +/- 6 seconds.
HT0697
HT0697.The orthometric height was determined by differential leveling
HT0697.and adjusted by the National Geodetic Survey in June 1991.
HT0697.WARNING-Repeat measurements at this control monument indicate possible
HT0697.vertical movement.
HT0697
HT0697.This Tidal Bench Mark is designated as VM 971
HT0697.by the Center for Operational Oceanographic Products and Services.
HT0697
HT0697.The geoid height was determined by GEOID99.
HT0697
HT0697.The dynamic height is computed by dividing the NAVD 88
HT0697.geopotential number by the normal gravity value computed on the
HT0697.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
HT0697.degrees latitude (G = 980.6199 gals.).
HT0697
HT0697.The modeled gravity was interpolated from observed gravity values.
HT0697
HT0697;                    North         East    Units  Estimated Accuracy
HT0697;SPC CA 3     -   647,000.    1,826,500.      MT  (+/- 180 meters Scaled)
HT0697
HT0697                          SUPERSEDED SURVEY CONTROL
HT0697
HT0697  NGVD 29     -         4.211  (m)           13.82   (f) ADJUSTED    1 1
HT0697
HT0697.Superseded values are not recommended for survey control.
HT0697.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
HT0697.See file dsdata.txt to determine how the superseded data were derived.
HT0697
HT0697_MARKER: DJ = TIDAL STATION DISK
HT0697_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
HT0697_STAMPING: BM 174 1925
HT0697_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
HT0697+STABILITY: SURFACE MOTION
HT0697_SATELLITE: THE SITE LOCATION WAS REPORTED AS NOT SUITABLE FOR
HT0697+SATELLITE: SATELLITE OBSERVATIONS - September 13, 1988
HT0697
HT0697  HISTORY     - Date     Condition        Recov. By
HT0697  HISTORY     - 1925     MONUMENTED       CGS
HT0697  HISTORY     - 1952     GOOD             NGS
HT0697  HISTORY     - 1969     GOOD             NGS
HT0697  HISTORY     - 1977     GOOD             NGS
HT0697  HISTORY     - 19880913 GOOD             NGS
HT0697
HT0697                          STATION DESCRIPTION
HT0697
HT0697''DESCRIBED BY NATIONAL GEODETIC SURVEY 1952
HT0697''AT SAN FRANCISCO.
HT0697''AT SAN FRANCISCO, AT THE PRESIDIO, ABOUT 125 FEET WEST OF THE
HT0697''PROLONGATION OF THE WEST LINE OF THE ENGINEERS DOCK WHERE IT
HT0697''CROSSES MARINE DRIVE, AT THE APPROXIMATE CENTER OF A Y JUNCTION
HT0697''FORMED BY MARINE DRIVE AND A ROAD LEADING SOUTHEAST TO FORT
HT0697''WINFIELD SCOTT, 42.7 FEET SOUTHWEST OF A FIRE PLUB, 28.3 FEET
HT0697''SOUTH OF THE SOUTH EDGE OF AN IRON MAN HOLE COVER, AND SET IN
HT0697''THE TOP OF A CONCRETE POST FLUSH WITH THE DRIVE.
HT0697
HT0697                          STATION RECOVERY (1969)
HT0697
HT0697''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1969
HT0697''RECOVERED IN GOOD CONDITION.
HT0697
HT0697                          STATION RECOVERY (1977)
HT0697
HT0697''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977
HT0697''RECOVERED IN GOOD CONDITION.
HT0697
HT0697                          STATION RECOVERY (1988)
HT0697
HT0697''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1988
HT0697''RECOVERED IN GOOD CONDITION WITH THE FOLLOWING EXCEPTIONS.  ADD--IN
HT0697''THE CENTER OF A 6.0 FOOT DIAMETER BRICK AND ROCK CIRCLE, 15.5 M
HT0697''(50.9 FT) SOUTH-SOUTHWEST OF THE SOUTH CORNER OF THE NATIONAL PARK
HT0697''SERVICE BUILDING NUMBER T989, AND 4.7 M (15.4 FT) NORTHEAST OF THE
HT0697''CENTERLINE OF MARINE DRIVE.