National Geodetic Survey,   Retrieval Date = MAY 17, 2019
 GO0501 ***********************************************************************
 GO0501  DESIGNATION -  BLACK PINNACLE LOOKOUT HOUSE
 GO0501  PID         -  GO0501
 GO0501  STATE/COUNTY-  AZ/APACHE
 GO0501  COUNTRY     -  US
 GO0501  USGS QUAD   -  TSAILE (1982)
 GO0501
 GO0501                         *CURRENT SURVEY CONTROL
 GO0501  ______________________________________________________________________
 GO0501* NAD 83(1992) POSITION- 36 15 09.15473(N) 109 09 25.58881(W)   ADJUSTED  
 GO0501* NAVD 88 ORTHO HEIGHT -  2420.6   (meters)     7942.    (feet) VERTCON   
 GO0501  ______________________________________________________________________
 GO0501  GEOID HEIGHT    -        -19.329 (meters)                     GEOID12B
 GO0501  LAPLACE CORR    -          0.83  (seconds)                    DEFLEC12B
 GO0501  HORZ ORDER      -  THIRD
 GO0501
 GO0501.The horizontal coordinates were established by classical geodetic methods
 GO0501.and adjusted by the National Geodetic Survey in August 1993.
 GO0501.
 GO0501.The NAVD 88 height was computed by applying the VERTCON shift value to
 GO0501.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
 GO0501
 GO0501.Significant digits in the geoid height do not necessarily reflect accuracy.
 GO0501.GEOID12B height accuracy estimate available here.
 GO0501
 GO0501.The Laplace correction was computed from DEFLEC12B derived deflections.
 GO0501
 GO0501. The following values were computed from the NAD 83(1992) position.
 GO0501
 GO0501;                    North         East     Units Scale Factor Converg.
 GO0501;SPC AZ E     -   583,005.292   304,086.779   MT  1.00000139   +0 35 49.3
 GO0501;SPC AZ E     - 1,912,747.02    997,660.04   iFT  1.00000139   +0 35 49.3
 GO0501;UTM  12      - 4,013,534.696   665,572.953   MT  0.99993778   +1 05 24.1
 GO0501
 GO0501!             -  Elev Factor  x  Scale Factor =   Combined Factor
 GO0501!SPC AZ E     -   0.99962328  x   1.00000139  =   0.99962467
 GO0501!UTM  12      -   0.99962328  x   0.99993778  =   0.99956108
 GO0501
 GO0501:                Primary Azimuth Mark                     Grid Az
 GO0501:SPC AZ E     -  RIM RESET                                281 13 12.7
 GO0501:UTM  12      -  RIM RESET                                280 43 37.9
 GO0501
 GO0501_U.S. NATIONAL GRID SPATIAL ADDRESS: 12SXF6557213534(NAD 83)
 GO0501
 GO0501|---------------------------------------------------------------------|
 GO0501| PID    Reference Object                     Distance      Geod. Az  |
 GO0501|                                                           dddmmss.s |
 GO0501| GO0269 RIM RESET                           APPROX.14.8 KM 2814902.0 |
 GO0501|---------------------------------------------------------------------|
 GO0501
 GO0501                          SUPERSEDED SURVEY CONTROL
 GO0501
 GO0501  NAD 83(1986)-  36 15 09.15569(N)    109 09 25.58323(W) AD(       ) 3
 GO0501  NAD 27      -  36 15 09.15000(N)    109 09 23.22000(W) AD(       ) 3
 GO0501  NGVD 29 (08/22/88) 2419.5    (m)         7938.     (f) VERT ANG       
 GO0501
 GO0501.Superseded values are not recommended for survey control.
 GO0501
 GO0501.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
 GO0501.See file dsdata.pdf to determine how the superseded data were derived.
 GO0501
 GO0501_MARKER: 73 = LOOKOUT HOUSE
 GO0501
 GO0501  HISTORY     - Date     Condition        Report By
 GO0501  HISTORY     - 1937     FIRST OBSERVED   USGS
 GO0501  HISTORY     - 1951     GOOD             CGS
 GO0501  HISTORY     - 1955     GOOD             USGS
 GO0501  HISTORY     - 1968     GOOD             CGS
 GO0501
 GO0501                          STATION DESCRIPTION
 GO0501
 GO0501'DESCRIBED BY US GEOLOGICAL SURVEY 1937
 GO0501'LOCATED 32.0 MI NE. OF CHINLE, ABOUT 18 MI SE. OF LUKACHUKAI, 5
 GO0501'MI E. OF CHINLE-WHEATFIELD RD. CROSSING TSAILE CREEK.  AT SHEEP
 GO0501'DIP CORRAL, ON HIGH PROMINENT ISOLATED ROCKY BUTTE KNOWN LOCALLY
 GO0501'AS BLACK PINNACLE.
 GO0501'
 GO0501'TO REACH FROM CHINLE, DRIVE 32 MI NE. ON CHINLE-WHEATFIELD RD. TO
 GO0501'BUTTE.
 GO0501'
 GO0501'STATION MARK--CENTER OF FS LO CABIN.
 GO0501'
 GO0501'RM 1--STANDARD RM TABLET STAMPED---BLACK PINNACLE LO 1937---,
 GO0501'CEMENTED IN SOLID ROCK.
 GO0501'
 GO0501'RM 2--EYEBOLT EMBEDDED IN SOLID ROCK AT SOUTHWEST CORNER OF
 GO0501'CABIN.
 GO0501
 GO0501                          STATION RECOVERY (1951)
 GO0501
 GO0501'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1951 (WRH)
 GO0501'THE STATION IS LOCATED ON THE SUMMIT OF BLACK PINNACLE
 GO0501'MOUNTAIN, ABOUT 33 MILES AIRLINE NORTH OF FT. DEFIANCE, AND
 GO0501'ABOUT 44 MILES AIRLINE SOUTH-SOUTHWEST OF SHIPROCK.
 GO0501'IT IS A STANDARD TYPE OF LOOKOUT HOUSE THAT SITS ON THE
 GO0501'GROUND AND PROJECTS ABOUT 14 FEET.  THE OBJECT THAT WAS
 GO0501'INTERSECTED IS THE TOP CENTER OF THE ROOF.
 GO0501
 GO0501                          STATION RECOVERY (1955)
 GO0501
 GO0501'RECOVERY NOTE BY US GEOLOGICAL SURVEY 1955
 GO0501'RECOVERED AS DESCRIBED BY USGS IN 1937.  ALL MARKS IN GOOD
 GO0501'CONDITION.  INTERSECTED BY NGS IN 1951.
 GO0501
 GO0501                          STATION RECOVERY (1968)
 GO0501
 GO0501'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1968 (VHB)
 GO0501'THE STATION WAS RECOVERED AS DESCRIBED AND ALL MARKS WERE
 GO0501'FOUND IN GOOD CONDITION.
 GO0501'
 GO0501'THE APEX OF THE LOOKOUT HOUSE IS THE STATION POINT.
 GO0501'
 GO0501'A DESCRIPTION TO REACH THE STATION FOLLOWS.
 GO0501'
 GO0501'TO REACH THE STATION FROM THE JUNCTION OF STATE HIGHWAYS 7
 GO0501'AND 12 IN FT. DEFIANCE, GO NORTH ON STATE HIGHWAY 12 FOR
 GO0501'35.1 MILES TO THE DAM AT WHEATFIELD LAKE.  CONTINUE NORTHWESTERLY
 GO0501'FOR 4.8 MILES TO A SIDE ROAD, RIGHT AND A SIGN BLACK PINNACLE
 GO0501'LOOKOUT.  TURN RIGHT OFF THE HIGHWAY AND GO NORTH AND WEST
 GO0501'ON A DIRT ROAD FOR 1.2 MILES TO THE END OF THE ROAD AND THE
 GO0501'STATION.
 GO0501'
 GO0501'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--ABOUT 33
 GO0501'MILES NORTH OF FT. DEFIANCE.