HL0428 ***********************************************************************
HL0428  DESIGNATION -  K 439
HL0428  PID         -  HL0428
HL0428  STATE/COUNTY-  CO/SAN JUAN
HL0428  USGS QUAD   -  SILVERTON (1984)
HL0428
HL0428                         *CURRENT SURVEY CONTROL
HL0428  ___________________________________________________________________
HL0428* NAD 83(1986)-  37 49 34.     (N)    107 43 16.     (W)     SCALED
HL0428* NAVD 88     -      2983.805  (meters)    9789.37   (feet)  ADJUSTED
HL0428  ___________________________________________________________________
HL0428  GEOID HEIGHT-         -15.48  (meters)                     GEOID99
HL0428  DYNAMIC HT  -        2979.464 (meters)    9775.12  (feet)  COMP
HL0428  MODELED GRAV-     979,066.7   (mgal)                       NAVD 88
HL0428
HL0428  VERT ORDER  -  FIRST     CLASS II
HL0428
HL0428.The horizontal coordinates were scaled from a topographic map and have
HL0428.an estimated accuracy of +/- 6 seconds.
HL0428
HL0428.The orthometric height was determined by differential leveling
HL0428.and adjusted by the National Geodetic Survey in June 1991.
HL0428
HL0428.The geoid height was determined by GEOID99.
HL0428
HL0428.The dynamic height is computed by dividing the NAVD 88
HL0428.geopotential number by the normal gravity value computed on the
HL0428.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
HL0428.degrees latitude (G = 980.6199 gals.).
HL0428
HL0428.The modeled gravity was interpolated from observed gravity values.
HL0428
HL0428;                    North         East    Units  Estimated Accuracy
HL0428;SPC CO S     -   435,810.      718,890.      MT  (+/- 180 meters Scaled)
HL0428
HL0428                          SUPERSEDED SURVEY CONTROL
HL0428
HL0428.No superseded survey control is available for this station.
HL0428
HL0428_MARKER: DB = BENCH MARK DISK
HL0428_SETTING: 66 = SET IN ROCK OUTCROP
HL0428_STAMPING: K 439 1985
HL0428_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL
HL0428
HL0428  HISTORY     - Date     Condition        Recov. By
HL0428  HISTORY     - 1985     MONUMENTED       NGS
HL0428  HISTORY     - 19910705 GOOD             USPSQD
HL0428
HL0428                          STATION DESCRIPTION
HL0428
HL0428''DESCRIBED BY NATIONAL GEODETIC SURVEY 1985
HL0428''5.5 KM (3.4 MI) NORTH FROM SILVERTON.
HL0428''5.5 KM (3.4 MI) NORTHERLY ALONG U.S. HIGHWAY 550 FROM ITS JUNCTION
HL0428''WITH STATE HIGHWAY 110 IN SILVERTON, IN AN EXPOSED AREA OF BEDROCK IN
HL0428''A HIGHWAY CUT, 0.4 KM (0.25 MI) SOUTH OF MILEPOST 74, AND 7.5 M (24.6
HL0428''FT) EAST OF THE CENTERLINE OF THE HIGHWAY.
HL0428''THE MARK IS 0.6 METERS  S FROM  A WITNESS POST
HL0428''THE MARK IS 0.6 M ABOVE THE HIGHWAY.
HL0428
HL0428                          STATION RECOVERY (1991)
HL0428
HL0428''RECOVERY NOTE BY US POWER SQUADRON 1991 (WLR)
HL0428''RECOVERED IN GOOD CONDITION.