HL0430 ***********************************************************************
HL0430  DESIGNATION -  W 439
HL0430  PID         -  HL0430
HL0430  STATE/COUNTY-  CO/SAN JUAN
HL0430  USGS QUAD   -  SILVERTON (1984)
HL0430
HL0430                         *CURRENT SURVEY CONTROL
HL0430  ___________________________________________________________________
HL0430* NAD 83(1986)-  37 50 20.     (N)    107 43 30.     (W)     SCALED
HL0430* NAVD 88     -      3057.815  (meters)   10032.18   (feet)  ADJUSTED
HL0430  ___________________________________________________________________
HL0430  GEOID HEIGHT-         -15.48  (meters)                     GEOID99
HL0430  DYNAMIC HT  -        3053.344 (meters)   10017.51  (feet)  COMP
HL0430  MODELED GRAV-     979,056.4   (mgal)                       NAVD 88
HL0430
HL0430  VERT ORDER  -  FIRST     CLASS II
HL0430
HL0430.The horizontal coordinates were scaled from a topographic map and have
HL0430.an estimated accuracy of +/- 6 seconds.
HL0430
HL0430.The orthometric height was determined by differential leveling
HL0430.and adjusted by the National Geodetic Survey in June 1991.
HL0430
HL0430.The geoid height was determined by GEOID99.
HL0430
HL0430.The dynamic height is computed by dividing the NAVD 88
HL0430.geopotential number by the normal gravity value computed on the
HL0430.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
HL0430.degrees latitude (G = 980.6199 gals.).
HL0430
HL0430.The modeled gravity was interpolated from observed gravity values.
HL0430
HL0430;                    North         East    Units  Estimated Accuracy
HL0430;SPC CO S     -   437,230.      718,580.      MT  (+/- 180 meters Scaled)
HL0430
HL0430                          SUPERSEDED SURVEY CONTROL
HL0430
HL0430.No superseded survey control is available for this station.
HL0430
HL0430_MARKER: DB = BENCH MARK DISK
HL0430_SETTING: 66 = SET IN ROCK OUTCROP
HL0430_STAMPING: W 439 1985
HL0430_STABILITY: A = MOST RELIABLE AND EXPECTED TO HOLD
HL0430+STABILITY: POSITION/ELEVATION WELL
HL0430
HL0430  HISTORY     - Date     Condition        Recov. By
HL0430  HISTORY     - 1985     MONUMENTED       NGS
HL0430  HISTORY     - 19910705 GOOD             USPSQD
HL0430
HL0430                          STATION DESCRIPTION
HL0430
HL0430''DESCRIBED BY NATIONAL GEODETIC SURVEY 1985
HL0430''7.0 KM (4.35 MI) NORTH FROM SILVERTON.
HL0430''7.0 KM (4.35 MI) NORTHERLY ALONG U.S. HIGHWAY 550 FROM ITS JUNCTION
HL0430''WITH STATE HIGHWAY 110 IN SILVERTON, SET VERTICALLY IN THE WEST FACE
HL0430''OF AN EXPOSED AREA OF BEDROCK IN A HIGHWAY CUT, AND 8.2 M (26.9 FT)
HL0430''EAST OF THE CENTERLINE OF THE HIGHWAY.
HL0430''THE MARK IS 2.0 METERS  N FROM  A WITNESS POST
HL0430''THE MARK IS 1.6 M ABOVE THE HIGHWAY.
HL0430
HL0430                          STATION RECOVERY (1991)
HL0430
HL0430''RECOVERY NOTE BY US POWER SQUADRON 1991 (WLR)
HL0430''RECOVERED IN GOOD CONDITION.