HL0423 ***********************************************************************
HL0423  DESIGNATION -  N 439
HL0423  PID         -  HL0423
HL0423  STATE/COUNTY-  CO/SAN JUAN
HL0423  USGS QUAD   -  SILVERTON (1984)
HL0423
HL0423                         *CURRENT SURVEY CONTROL
HL0423  ___________________________________________________________________
HL0423* NAD 83(1986)-  37 48 20.     (N)    107 40 49.     (W)     SCALED
HL0423* NAVD 88     -      2866.626  (meters)    9404.92   (feet)  ADJUSTED
HL0423  ___________________________________________________________________
HL0423  GEOID HEIGHT-         -15.42  (meters)                     GEOID99
HL0423  DYNAMIC HT  -        2862.500 (meters)    9391.39  (feet)  COMP
HL0423  MODELED GRAV-     979,086.8   (mgal)                       NAVD 88
HL0423
HL0423  VERT ORDER  -  FIRST     CLASS II
HL0423
HL0423.The horizontal coordinates were scaled from a topographic map and have
HL0423.an estimated accuracy of +/- 6 seconds.
HL0423
HL0423.The orthometric height was determined by differential leveling
HL0423.and adjusted by the National Geodetic Survey in June 1991.
HL0423
HL0423.The geoid height was determined by GEOID99.
HL0423
HL0423.The dynamic height is computed by dividing the NAVD 88
HL0423.geopotential number by the normal gravity value computed on the
HL0423.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
HL0423.degrees latitude (G = 980.6199 gals.).
HL0423
HL0423.The modeled gravity was interpolated from observed gravity values.
HL0423
HL0423;                    North         East    Units  Estimated Accuracy
HL0423;SPC CO S     -   433,440.      722,430.      MT  (+/- 180 meters Scaled)
HL0423
HL0423                          SUPERSEDED SURVEY CONTROL
HL0423
HL0423.No superseded survey control is available for this station.
HL0423
HL0423_MARKER: DB = BENCH MARK DISK
HL0423_SETTING: 66 = SET IN ROCK OUTCROP
HL0423_STAMPING: N 439 1985
HL0423_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL
HL0423
HL0423  HISTORY     - Date     Condition        Recov. By
HL0423  HISTORY     - 1985     MONUMENTED       NGS
HL0423  HISTORY     - 19910707 GOOD             USPSQD
HL0423
HL0423                          STATION DESCRIPTION
HL0423
HL0423''DESCRIBED BY NATIONAL GEODETIC SURVEY 1985
HL0423''1.0 KM (0.6 MI) SOUTH FROM SILVERTON.
HL0423''1.0 KM (0.6 MI) SOUTHERLY ALONG U.S. HIGHWAY 550 FROM ITS JUNCTION
HL0423''WITH STATE HIGHWAY 110 IN SILVERTON, IN THE CENTER OF THE SOUTH END OF
HL0423''A 3- BY 4-FOOT EXPOSED AREA OF OUTCROPPING BEDROCK, 21.0 M (68.9 FT)
HL0423''WEST OF THE CENTERLINE OF THE HIGHWAY, 14.5 M (47.6 FT) SOUTH OF THE
HL0423''CENTER OF A DIRT ROAD LEADING TO THE P AND G MINING INCORPORATED, AND
HL0423''0.3 M (1.0 FT) NORTH OF THE SOUTH END OF THE OUTCROP.
HL0423''THE MARK IS 0.3 METERS  S FROM  A WITNESS POST
HL0423''THE MARK IS 1.0 M ABOVE THE HIGHWAY.
HL0423
HL0423                          STATION RECOVERY (1991)
HL0423
HL0423''RECOVERY NOTE BY US POWER SQUADRON 1991 (WLR)
HL0423''RECOVERED IN GOOD CONDITION.