National Geodetic Survey,   Retrieval Date = SEPTEMBER 16, 2002
 LT0615 ***********************************************************************
 LT0615  DESIGNATION -  BLACKS RIDGE
 LT0615  PID         -  LT0615
 LT0615  STATE/COUNTY-  CA/LASSEN
 LT0615  USGS QUAD   -  CORDERS RESERVOIR (1995)
 LT0615
 LT0615                         *CURRENT SURVEY CONTROL
 LT0615  ___________________________________________________________________
 LT0615* NAD 83(1992)-  40 50 24.45413(N)    121 10 34.22747(W)     ADJUSTED  
 LT0615* NAVD 88     -      1843.1    (meters)    6047.     (feet)  VERTCON   
 LT0615  ___________________________________________________________________
 LT0615  EPOCH DATE  -        1991.35
 LT0615  LAPLACE CORR-           4.42  (seconds)                    DEFLEC99
 LT0615  GEOID HEIGHT-         -23.31  (meters)                     GEOID99
 LT0615
 LT0615  HORZ ORDER  -  THIRD
 LT0615
 LT0615.The horizontal coordinates were established by classical geodetic methods
 LT0615.and adjusted by the National Geodetic Survey in March 1994.
 LT0615.The horizontal coordinates are valid at the epoch date displayed above.
 LT0615.The epoch date for horizontal control is a decimal equivalence
 LT0615.of Year/Month/Day.
 LT0615
 LT0615.The NAVD 88 height was computed by applying the VERTCON shift value to
 LT0615.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
 LT0615
 LT0615.The Laplace correction was computed from DEFLEC99 derived deflections.
 LT0615
 LT0615.The geoid height was determined by GEOID99.
 LT0615
 LT0615;                    North         East     Units   Scale      Converg.
 LT0615;SPC CA 1     -   667,636.583 2,069,471.594   MT  0.99989464 +0 32 19.3
 LT0615;SPC CA 1     - 2,190,404.36  6,789,591.39   sFT  0.99989464 +0 32 19.3
 LT0615;UTM  10      - 4,522,610.455   653,760.375   MT  0.99989100 +1 11 34.5
 LT0615
 LT0615:                Primary Azimuth Mark                     Grid Az
 LT0615:SPC CA 1     -  DIXIE                                    038 40 53.0
 LT0615:UTM  10      -  DIXIE                                    038 01 37.8
 LT0615
 LT0615|---------------------------------------------------------------------|
 LT0615| PID    Reference Object                     Distance      Geod. Az  |
 LT0615|                                                           dddmmss.s |
 LT0615| LT0609 DIXIE                               APPROX.11.0 KM 0391312.3 |
 LT0615| LT0614 BLACKS RIDGE LOT 1948                17.500 METERS 08450     |
 LT0615| DB6328 BLACKS RIDGE RM 1                     8.398 METERS 12101     |
 LT0615| DB6329 BLACKS RIDGE RM 2                     5.762 METERS 22213     |
 LT0615|---------------------------------------------------------------------|
 LT0615
 LT0615                          SUPERSEDED SURVEY CONTROL
 LT0615
 LT0615  NAD 83(1986)-  40 50 24.46215(N)    121 10 34.23702(W) AD(1984.00) 3
 LT0615  NAD 27      -  40 50 24.86400(N)    121 10 30.34600(W) AD(       ) 3
 LT0615  NGVD 29     -      1842.0    (m)         6043.     (f) VERT ANG       
 LT0615
 LT0615.Superseded values are not recommended for survey control.
 LT0615.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
 LT0615.See file dsdata.txt to determine how the superseded data were derived.
 LT0615
 LT0615_MARKER: DO = NOT SPECIFIED OR SEE DESCRIPTION
 LT0615_SETTING: 80 = SET IN A BOULDER
 LT0615
 LT0615  HISTORY     - Date     Condition        Report By
 LT0615  HISTORY     - 1948     MONUMENTED       CGS
 LT0615
 LT0615                          STATION DESCRIPTION
 LT0615
 LT0615'DESCRIBED BY COAST AND GEODETIC SURVEY 1948 (WRH)
 LT0615'THE STATION IS LOCATED ON THE SUMMIT OF BLACKS RIDGE THAT IS IN
 LT0615'THE LASSEN NATIONAL FOREST.  IT IS ABOUT 4 MILES AIRLINE
 LT0615'SOUTH OF THE TOWN OF LITTLE VALLEY AND ABOUT 18 MILES AIRLINE
 LT0615'SOUTHEAST OF FALL RIVER MILLS.
 LT0615'
 LT0615'THE STATION IS A STANDARD STATION DISK THAT IS SET IN A DRILL
 LT0615'HOLE IN THE TOP OF A BOULDER THAT PROJECTS 5 INCHES ABOVE
 LT0615'THE GROUND (AS DESCRIBED IN NOTE 4).  IT IS 16 FEET EAST
 LT0615'OF A 12 INCH JUNIPER TREE.  THE DISK IS STAMPED BLACKS RIDGE
 LT0615'1948.
 LT0615'
 LT0615'REFERENCE MARK NUMBER ONE IS A STANDARD REFERENCE MARK DISK
 LT0615'THAT IS SET IN A DRILL HOLE IN THE TOP OF A BOULDER THAT
 LT0615'PROJECTS 5 INCHES ABOVE THE GROUND (AS DESCRIBED IN NOTE 12C).
 LT0615'IT IS ABOUT 42 FEET SOUTHWEST OF THE CENTER OF THE LOOKOUT
 LT0615'TOWER AND IS ABOUT THE SAME ELEVATION AS THE STATION.  THE DISK
 LT0615'IS STAMPED BLACKS RIDGE NO 1 1948.
 LT0615'
 LT0615'REFERENCE MARK NUMBER TWO IS A STANDARD REFERENCE MARK DISK
 LT0615'THAT IS SET IN A DRILL HOLE IN THE TOP OF A BOULDER THAT PROJECTS
 LT0615'18 INCHES ABOVE THE GROUND (AS DESCRIBED IN NOTE 12C).  IT IS
 LT0615'19 FEET SOUTH SOUTHEAST OF THE 12 INCH JUNIPER TREE AND IS
 LT0615'ABOUT THE SAME ELEVATION AS THE STATION.  THE DISK IS STAMPED
 LT0615'BLACKS RIDGE NO 2 1948.
 LT0615'
 LT0615'THE STATION DIXIE 1920 WILL SERVE AS THE AZIMUTH MARK.  FOR
 LT0615'THE DETAILS CONCERNING THE MARK SEE THE DESCRIPTION FOR STATION
 LT0615'DIXIE 1920.
 LT0615'
 LT0615'THE BLACKS RIDGE LOOKOUT TOWER IS A STEEL TOWER THAT IS ABOUT
 LT0615'70 FEET HIGH AND HAS A GLASS ENCLOSED BUILDING ON ITS TOP.
 LT0615'IT IS LOCATED NEAR THE CENTER OF THE HIGHEST POINT OF BLACKS
 LT0615'RIDGE.  THERE IS A STEEL STAIRWAY FROM THE GROUND TO THE FLOOR
 LT0615'OF THE BUILDING AND THE ENTRANCE IS MADE THROUGH THE DOOR IN
 LT0615'THE FLOOR.
 LT0615'
 LT0615'TO REACH THE STATION FROM THE U.S. POST OFFICE IN LITTLE
 LT0615'VALLEY GO WEST FOR 0.05 MILE TO A FORK.  TAKE THE LEFT FORK, WEST
 LT0615'AND SOUTHWEST, FOR 0.7 MILE TO A FORK.  TAKE THE LEFT FORK
 LT0615'AS PER SIGN BLACKS RIDGE L.O. AND GO 1.8 MILES TO A FORK.
 LT0615'TAKE THE RIGHT FORK, MAIN TRAVELED ROAD, AND GO 0.9 MILE TO A
 LT0615'FORK.  TAKE THE LEFT FORK AS PER SIGN BLACKS RIDGE L.O. AND
 LT0615'GO 2.3 MILES TO THE BLACKS RIDGE LOOKOUT TOWER AND THE STATION
 LT0615'AS DESCRIBED.