HL0431 ***********************************************************************
HL0431  DESIGNATION -  X 439
HL0431  PID         -  HL0431
HL0431  STATE/COUNTY-  CO/SAN JUAN
HL0431  USGS QUAD   -  SILVERTON (1984)
HL0431
HL0431                         *CURRENT SURVEY CONTROL
HL0431  ___________________________________________________________________
HL0431* NAD 83(1986)-  37 50 55.     (N)    107 43 28.     (W)     SCALED
HL0431* NAVD 88     -      3079.545  (meters)   10103.47   (feet)  ADJUSTED
HL0431  ___________________________________________________________________
HL0431  GEOID HEIGHT-         -15.46  (meters)                     GEOID99
HL0431  DYNAMIC HT  -        3075.027 (meters)   10088.65  (feet)  COMP
HL0431  MODELED GRAV-     979,050.6   (mgal)                       NAVD 88
HL0431
HL0431  VERT ORDER  -  FIRST     CLASS II
HL0431
HL0431.The horizontal coordinates were scaled from a topographic map and have
HL0431.an estimated accuracy of +/- 6 seconds.
HL0431
HL0431.The orthometric height was determined by differential leveling
HL0431.and adjusted by the National Geodetic Survey in June 1991.
HL0431
HL0431.The geoid height was determined by GEOID99.
HL0431
HL0431.The dynamic height is computed by dividing the NAVD 88
HL0431.geopotential number by the normal gravity value computed on the
HL0431.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
HL0431.degrees latitude (G = 980.6199 gals.).
HL0431
HL0431.The modeled gravity was interpolated from observed gravity values.
HL0431
HL0431;                    North         East    Units  Estimated Accuracy
HL0431;SPC CO S     -   438,310.      718,650.      MT  (+/- 180 meters Scaled)
HL0431
HL0431                          SUPERSEDED SURVEY CONTROL
HL0431
HL0431.No superseded survey control is available for this station.
HL0431
HL0431_MARKER: DB = BENCH MARK DISK
HL0431_SETTING: 66 = SET IN ROCK OUTCROP
HL0431_STAMPING: X 439 1985
HL0431_STABILITY: A = MOST RELIABLE AND EXPECTED TO HOLD
HL0431+STABILITY: POSITION/ELEVATION WELL
HL0431
HL0431  HISTORY     - Date     Condition        Recov. By
HL0431  HISTORY     - 1985     MONUMENTED       NGS
HL0431  HISTORY     - 19910705 GOOD             USPSQD
HL0431
HL0431                          STATION DESCRIPTION
HL0431
HL0431''DESCRIBED BY NATIONAL GEODETIC SURVEY 1985
HL0431''8.0 KM (5.0 MI) NORTH FROM SILVERTON.
HL0431''8.0 KM (5.0 MI) NORTHERLY ALONG U.S. HIGHWAY 550 FROM ITS JUNCTION
HL0431''WITH STATE HIGHWAY 110 IN SILVERTON, 0.2 KM (0.1 MI) NORTH OF A DIRT
HL0431''ROAD, SET VERTICALLY IN THE WEST FACE OF AN EXPOSED AREA OF BEDROCK IN
HL0431''A HIGHWAY CUT, AND 8.0 M (26.2 FT) EAST OF THE CENTERLINE OF THE
HL0431''HIGHWAY.
HL0431''THE MARK IS 0.5 METERS  NE FROM  A WITNESS POST
HL0431''THE MARK IS 1.5 M ABOVE THE HIGHWAY.
HL0431
HL0431                          STATION RECOVERY (1991)
HL0431
HL0431''RECOVERY NOTE BY US POWER SQUADRON 1991 (WLR)
HL0431''RECOVERED IN GOOD CONDITION.