RD0577 ***********************************************************************
RD0577  DESIGNATION -  48 A
RD0577  PID         -  RD0577
RD0577  STATE/COUNTY-  OR/COLUMBIA
RD0577  USGS QUAD   -  ST HELENS (1990)
RD0577
RD0577                         *CURRENT SURVEY CONTROL
RD0577  ___________________________________________________________________
RD0577* NAD 83(1986)-  45 48 59.     (N)    122 50 58.     (W)     SCALED
RD0577* NAVD 88     -        16.017  (meters)      52.55   (feet)  POSTED
RD0577  ___________________________________________________________________
RD0577  GEOID HEIGHT-         -22.34  (meters)                     GEOID99
RD0577  DYNAMIC HT  -          16.020 (meters)      52.56  (feet)  COMP
RD0577  MODELED GRAV-     980,643.2   (mgal)                       NAVD 88
RD0577
RD0577  VERT ORDER  -  * POSTED, Code A , SEE BELOW
RD0577
RD0577.The horizontal coordinates were scaled from a topographic map and have
RD0577.an estimated accuracy of +/- 6 seconds.
RD0577
RD0577.The orthometric height was determined by differential leveling
RD0577.and adjusted by the National Geodetic Survey in 1992.
RD0577.* This is a POSTED BENCH MARK height.  Code A indicates a distribution
RD0577.rate of 0.0 thru 1.0 mm/km.
RD0577
RD0577.The geoid height was determined by GEOID99.
RD0577
RD0577.The dynamic height is computed by dividing the NAVD 88
RD0577.geopotential number by the normal gravity value computed on the
RD0577.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
RD0577.degrees latitude (G = 980.6199 gals.).
RD0577
RD0577.The modeled gravity was interpolated from observed gravity values.
RD0577
RD0577;                    North         East    Units  Estimated Accuracy
RD0577;SPC OR N     -   241,540.    2,317,440.      MT  (+/- 180 meters Scaled)
RD0577
RD0577                          SUPERSEDED SURVEY CONTROL
RD0577
RD0577  NGVD 29     -        15.006  (m)           49.23   (f) ADJ UNCH    1 2
RD0577
RD0577.Superseded values are not recommended for survey control.
RD0577.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
RD0577.See file dsdata.txt to determine how the superseded data were derived.
RD0577
RD0577_MARKER: P = PIPE CAP
RD0577_SETTING: 17 = SET INTO TOP OF METAL PIPE DRIVEN INTO GROUND
RD0577_STAMPING: 48 A
RD0577_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
RD0577
RD0577  HISTORY     - Date     Condition        Recov. By
RD0577  HISTORY     - UNK      MONUMENTED       USGS
RD0577  HISTORY     - 1935     GOOD             NGS
RD0577
RD0577                          STATION DESCRIPTION
RD0577
RD0577''DESCRIBED BY NATIONAL GEODETIC SURVEY 1935
RD0577''IN WARREN.
RD0577''3.1 MILES SOUTH ALONG THE SPOKANE, PORTLAND AND SEATTLE RAILWAY FROM
RD0577''ST. HELENS, COLUMBIA COUNTY, AT WARREN, 11 FEET NORTHEAST AND 73.5
RD0577''FEET SOUTHEAST OF THE EAST CORNER OF THE STATION, 325 FEET NORTHEAST
RD0577''OF THE POST OFFICE, 175 FEET NORTHEAST OF A 12 INCH MAPLE TREE, 103
RD0577''FEET SOUTHEAST OF THE TRACK CENTERLINE AND NEAR THE SOUTHEAST RIGHT OF
RD0577''WAY FENCE ALONG A ROAD.  A UNITED STATES GEOLOGICAL SURVEY STANDARD
RD0577''CAP STAMPED 48 A AND RIVETED TO A 3 1/2 INCH IRON PIPE ENCASED IN
RD0577''CONCRETE AND PROJECTING 22 INCHES ABOVE THE GROUND.