Twain

Twain is a triangulation station disk on the road between Sulphur and Leonard Creek Ranch.

Datasheet from http://www.ngs.noaa.gov/cgi-bin/ds_desig.prl (Retrieved 2016-Mar-29.

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 -   This listing contains control for which complete digital                -
 -   data sheets where not provided.  The complete data sheets were          -
 -   not provided for the reason listed below.  The reason below is          -
 -   associated with a horizontal control Nonpub code shown under            -
 -   the heading 'H' and/or a vertical control Nonpub code shown under       -
 -   the heading 'v'                                                         -
 -                                                                           -
 -   The format of the records are as follows:                               -
 -       Pid  = Station Permanent Identifier)                                -
 -       Name = Station Designation                                          -
 -       Lat  = Approx. Latitude (Degrees, Minutes, truncated Seconds)       -
 -       Lon  = Approx. Longitude (Degrees, Minutes, truncated Seconds)      -
 -       O    = Horizontal Order                                             -
 -       o    = Vertical Order                                               -
 -       H    = Horizontal Nonpub Code                                       -
 -       v    = Vertical Nonpub Code                                         -
 -                                                                           -
 -       H Nonpub HORIZONTAL CONTROL NONPUB REASON                           -
 -       -------- --------------------------------                           -
 -       B        Station is a RBN antenna                                   -
 -       C        Not a publishable datum within the state                   -
 -       D        No descriptive text available                              -
 -       I        No NAD83 coordinates available, only IGS08 coordinates     -
 -       L        CORS L1 Phase Center is not publishable                    -
 -       N        No geodetic control                                        -
 -       O        Outside NGS publication area                               -
 -       P        Purpose of position is not for network control             -
 -       R        Restricted position                                        -
 -       T        Station is a temporary point/bench mark                    -
 -       V        Station is a VOR antenna                                   -
 -       W        Weakly determined position                                 -
 -       X        Surface mark reported destroyed                            -
 -       Y        Surface and underground mark reported destroyed            -
                                                                             -
 -       v Nonpub VERTICAL CONTROL NONPUB REASON                             -
 -       -------- ------------------------------                             -
 -       C        Not a publishable datum within the state                   -
 -       D        No descriptive text available                              -
 -       F        Bench mark not yet adjusted                                -
 -       N        No geodetic control                                        -
 -       L        CORS L1 Phase Center is not publishable                    -
 -       O        Outside NGS publication area                               -
 -       R        Restricted elevation                                       -
 -       S        Mark is in a subsidence area                               -
 -       T        Station is a temporary point/bench mark                    -
 -       X        Surface mark reported destroyed                            -
 -       Y        Surface and underground mark reported destroyed            -
 -       Z        Presumed destroyed                                         -
 -                                                                           -
 -                                                                           -
 -   NOTE - Stations found in this listing may still have a valid            -
 -          datasheet produced by use of other publishable values.           -
 -          For example, an ADJUSTED height may be non-publishable           -
 -          but a good GPS height might be found on the datasheet.           -
 -          This listing does not imply that values found on the datasheet   -
 -          are restricted.  If it's on the datasheet, use it.               -
 -                                                                           -
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  Pid    Name                           Lat        Lon        Elev      O o Hv
  ------ ----------------------------- ---------- ----------- --------- - - --
 >MV0307 TWAIN                         41 03 02.3/118 43 10.3   1243.   1 3 XX

Datasheet from Geocaching:

MV0307 ***********************************************************************
MV0307  DESIGNATION -  TWAIN
MV0307  PID         -  MV0307
MV0307  STATE/COUNTY-  NV/HUMBOLDT
MV0307  USGS QUAD   -  SALT WATER SPRING
MV0307
MV0307                         *CURRENT SURVEY CONTROL
MV0307  ___________________________________________________________________
MV0307* NAD 83(1994)-  41 03 02.30954(N)    118 43 10.38988(W)     ADJUSTED
MV0307* NAVD 88     -      1244.11   (+/-2cm)    4081.7    (feet)  VERTCON
MV0307  ___________________________________________________________________
MV0307  LAPLACE CORR-           6.01  (seconds)                    DEFLEC99
MV0307  GEOID HEIGHT-         -21.39  (meters)                     GEOID99
MV0307
MV0307  HORZ ORDER  -  FIRST
MV0307  VERT ORDER  -  THIRD ? (See Below)
MV0307
MV0307.The horizontal coordinates were established by classical geodetic methods
MV0307.and adjusted by the National Geodetic Survey in June 1998.
MV0307
MV0307.The NAVD 88 height was computed by applying the VERTCON shift value to
MV0307.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
MV0307.The vertical order pertains to the superseded datum.
MV0307
MV0307.The Laplace correction was computed from DEFLEC99 derived deflections.
MV0307
MV0307.The geoid height was determined by GEOID99.
MV0307
MV0307;                    North         East     Units   Scale      Converg.
MV0307;SPC NV W     - 4,699,277.933   788,549.075   MT  0.99990161 -0 05 22.1
MV0307;UTM  11      - 4,545,803.115   355,490.701   MT  0.99985702 -1 07 46.1
MV0307
MV0307:                Primary Azimuth Mark                     Grid Az
MV0307:SPC NV W     -  TWAIN AZ MK                              138 31 00.3
MV0307:UTM  11      -  TWAIN AZ MK                              139 33 24.3
MV0307
MV0307|---------------------------------------------------------------------|
MV0307| PID    Reference Object                     Distance      Geod. Az  |
MV0307|                                                           dddmmss.s |
MV0307| MV0306 KING LEAR PEAK CAIRN                APPROX.21.8 KM 0392040.2 |
MV0307|        TWAIN AZ MK                                        1382538.2 |
MV0307|        TWAIN RM 1                                         21144     |
MV0307| MV0352 PAHUTE PEAK CAIRN                   APPROX.38.3 KM 3114950.6 |
MV0307|        TWAIN RM 2                           10.810 METERS 31609     |
MV0307|---------------------------------------------------------------------|
MV0307
MV0307                          SUPERSEDED SURVEY CONTROL
MV0307
MV0307  NAD 83(1986)-  41 03 02.32003(N)    118 43 10.38994(W) AD(       ) 1
MV0307  NAD 27      -  41 03 02.67800(N)    118 43 06.79400(W) AD(       ) 1
MV0307  NGVD 29     -      1243.10   (m)         4078.4    (f) LEVELING    3
MV0307
MV0307.Superseded values are not recommended for survey control.
MV0307.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
MV0307.See file dsdata.txt to determine how the superseded data were derived.
MV0307
MV0307_MARKER: DS = TRIANGULATION STATION DISK
MV0307_SETTING: 4 = OBJECT SURROUNDED BY MASS OF CONCRETE
MV0307_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
MV0307
MV0307  HISTORY     - Date     Condition        Recov. By
MV0307  HISTORY     - 1935     MONUMENTED       CGS
MV0307  HISTORY     - 1965     GOOD             USGS
MV0307
MV0307                          STATION DESCRIPTION
MV0307
MV0307''DESCRIBED BY COAST AND GEODETIC SURVEY 1935 (CP)
MV0307''STATION IS ABOUT 13 MILES, AIRLINE, N OF SULPHUR, ON THE E
MV0307''EDGE OF QUINN RIVER SINK, AND AT W SLOPE OF JACKSON MOUNTAINS,
MV0307''13 MILES, AIRLINE, SSW OF KING LEAR PEAK, ON A PROMINENT
MV0307''SAND BANK, JUST N OF DEEP WASH 50 YARDS SW OF HOT SPRING
MV0307''MOUND, AND 50 YARDS WSW OF OLD SHACK, FORMERLY OCCUPIED
MV0307''BY MARK TWAIN, 29 FEET W AND ABOVE ROUGH ROAD RUNNING N-S
MV0307''ALONG E SIDE OF QUINN RIVER SINK.  AZIMUTH MARK LIES 3/4
MV0307''MILE E OF STATION, IN ROCK OUTCROP, AT EXTREME N END OF A
MV0307''LONG LAVA ROCK RIDGE, SLIGHTLY ABOVE RIDGE ELEVATION, AND IN
MV0307''ISOLATED ROUND ROCK FORMATION.
MV0307''
MV0307''STATION AND REFERENCE MARKS ARE STANDARD BRONZE DISKS SET
MV0307''IN CONCRETE.  AZIMUTH MARK
MV0307''IS A STANDARD BRONZE DISK IN OUTCROPPING BEDROCK.
MV0307''
MV0307''REACHED FROM SULPHUR BY TAKING ROAD JUST ACROSS TRACKS LEADING
MV0307''N UP THE E SIDE OF BLACK ROCK DESERT FOR 12.8 MILES TO HOT
MV0307''SPRINGS, CABIN AND STATION.
MV0307''
MV0307''REFERENCE MARK NO. 1 IN W HEADWALL OF CONCRETE ROAD CULVERT.
MV0307
MV0307                          STATION RECOVERY (1965)
MV0307
MV0307''RECOVERY NOTE BY US GEOLOGICAL SURVEY 1965
MV0307''DESCRIPTION AND POSITION LISTED IN NGS QUAD 41118-3 STATION 1008.
MV0307''STATION MARK--STANDARD DISC SET IN CONCRETE. REFERENCE MARK NO.
MV0307''1--COULD NOT BE FOUND IN 1965.

Remote Resources

• 1937 Humboldt Map
• Description of the triangulation station disk
• Overview