HT3042 ***********************************************************************
HT3042  DESIGNATION -  SOUTH TWIN 2
HT3042  PID         -  HT3042
HT3042  STATE/COUNTY-  CA/SAN FRANCISCO
HT3042  USGS QUAD   -  SAN FRANCISCO NORTH (1995)
HT3042
HT3042                         *CURRENT SURVEY CONTROL
HT3042  ___________________________________________________________________
HT3042* NAD 83(1992)-  37 45 05.71059(N)    122 26 51.79744(W)     ADJUSTED
HT3042* NAVD 88     -       282.     (meters)     925.     (feet)  SCALED
HT3042  ___________________________________________________________________
HT3042  EPOCH DATE  -        1991.35
HT3042  LAPLACE CORR-           2.90  (seconds)                    DEFLEC99
HT3042  GEOID HEIGHT-         -32.48  (meters)                     GEOID99
HT3042
HT3042  HORZ ORDER  -  FIRST
HT3042
HT3042.The horizontal coordinates were established by classical geodetic methods
HT3042.and adjusted by the National Geodetic Survey in March 1994.
HT3042.The horizontal coordinates are valid at the epoch date displayed above.
HT3042.The epoch date for horizontal control is a decimal equivalence
HT3042.of Year/Month/Day.
HT3042
HT3042.The orthometric height was scaled from a topographic map.
HT3042
HT3042.The Laplace correction was computed from DEFLEC99 derived deflections.
HT3042
HT3042.The geoid height was determined by GEOID99.
HT3042
HT3042;                    North         East     Units   Scale      Converg.
HT3042;SPC CA 3     - 2,101,991.12  5,998,596.65   sFT  0.99992918 -1 11 32.8
HT3042;SPC CA 3     -   640,688.176 1,828,375.915   MT  0.99992918 -1 11 32.8
HT3042;UTM  10      - 4,178,397.144   548,651.873   MT  0.99962915 +0 20 17.3
HT3042
HT3042:                Primary Azimuth Mark                     Grid Az
HT3042:SPC CA 3     -  SAN BRUNO MOUNTAIN RESET                 172 37 14.8
HT3042:UTM  10      -  SAN BRUNO MOUNTAIN RESET                 171 05 24.7
HT3042
HT3042|---------------------------------------------------------------------|
HT3042| PID    Reference Object                     Distance      Geod. Az  |
HT3042|                                                           dddmmss.s |
HT3042| HT3089 SAN FRANCISCO RAD STA KJBS TWR      APPROX. 4.9 KM 0295154.9 |
HT3042| HT3097 SAN FRANCISCO RAD KCBS FM TWR       APPROX. 5.5 KM 0323826.5 |
HT3042| HT3095 SAN FRANCISCO RAD STA KSAN TWR      APPROX. 3.9 KM 0442229.4 |
HT3042| HT3139 SOUTH TWIN RM 1                      19.472 METERS 05824     |
HT3042| HT2797 KYA RADIO TOWER                     APPROX. 6.1 KM 1301753.2 |
HT3042| HT2809 SAN BRUNO MTN TV STA KRON TWR       APPROX. 7.3 KM 1711832.7 |
HT3042| HT2825 SAN BRUNO MOUNTAIN RESET            APPROX. 7.2 KM 1712542.0 |
HT3042| HT2811 SAN BRUNO MTN TV STA KTVU TWR       APPROX. 7.0 KM 1714534.2 |
HT3042| HT2810 SAN BRUNO MTN TV STA KQED TWR       APPROX. 7.0 KM 1723842.9 |
HT3042|        SOUTH TWIN RM 2                       5.974 METERS 22254     |
HT3042|        TWIN PEAK RM 1                        6.269 METERS 23215     |
HT3042|        SOUTH TWIN 2 RM 3                     6.432 METERS 23534     |
HT3042| HT3046 SAN FRANCISCO TV KPIX KGO TWR       APPROX. 0.6 KM 3072100.0 |
HT3042|---------------------------------------------------------------------|
HT3042
HT3042                          SUPERSEDED SURVEY CONTROL
HT3042
HT3042  NAD 83(1986)-  37 45 05.70689(N)    122 26 51.79264(W) AD(1984.00) 1
HT3042  NAD 27      -  37 45 05.95600(N)    122 26 47.89100(W) AD(       ) 1
HT3042
HT3042.Superseded values are not recommended for survey control.
HT3042.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
HT3042.See file dsdata.txt to determine how the superseded data were derived.
HT3042
HT3042_MAGNETIC: N = NO MAGNETIC MATERIAL
HT3042_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
HT3042
HT3042  HISTORY     - Date     Condition        Recov. By
HT3042  HISTORY     - 1954     MONUMENTED       CGS
HT3042  HISTORY     - 1955     MONUMENTED       CGS
HT3042  HISTORY     - 1957     MONUMENTED       CGS
HT3042  HISTORY     - 1958     MONUMENTED       CGS
HT3042  HISTORY     - 1960     MONUMENTED       CGS
HT3042  HISTORY     - 1961     MONUMENTED       CGS
HT3042  HISTORY     - 1962     MONUMENTED       CGS
HT3042  HISTORY     - 1964     MONUMENTED       CGS
HT3042  HISTORY     - 1964     MONUMENTED       CGS
HT3042  HISTORY     - 1977     GOOD             NGS
HT3042  HISTORY     - 1977     GOOD             NGS
HT3042  HISTORY     - 1981     GOOD             NOS
HT3042
HT3042                          STATION DESCRIPTION
HT3042
HT3042''DESCRIBED BY COAST AND GEODETIC SURVEY 1954 (HCA)
HT3042''THE STATION IS LOCATED ON THE HIGHEST PART OF SOUTH TWIN MOUNTAIN
HT3042''IN SAN FRANCISCO.  THE MARK IS A STANDARD DISK, SET IN CONCRETE
HT3042''AND STAMPED SOUTH TWIN 2 1954.
HT3042''
HT3042''THERE ARE TWO REFERENCE MARKS BOTH STAMPED R.M. NO 1.  ONE IS
HT3042''STAMPED SOUTH TWIN NO 1 1932.  THE OTHER ONE IS STAMPED TWIN
HT3042''PEAK NO 1 1954.
HT3042''
HT3042''TO REACH FROM FLEISHACKER POOL, PROCEED E ON SLOOT BOULEVARD
HT3042''(HIGHWAY 5) TO PORTALO DRIVE, TURN LEFT ON TWIN PEAKS DRIVE, THENCE
HT3042''UP THE HILL TO STATION.
HT3042
HT3042                          STATION RECOVERY (1955)
HT3042
HT3042''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1955 (WMG)
HT3042''THE STATION IS ON THE HIGHEST POINT OF THE S ONE OF THE TWIN
HT3042''PEAKS IN THE CITY OF SAN FRANCISCO.
HT3042''
HT3042''THE STATION WAS ESTABLISHED (SECOND-ORDER) BY THE COMMANDING
HT3042''OFFICER OF THE SHIP BOWIE LAST YEAR.  NO DESCRIPTION WAS AVAILABLE
HT3042''AT THIS TIME.
HT3042''
HT3042''NO DESCRIPTION TO REACH IS NECESSARY, JUST GO TO THE S ONE OF THE
HT3042''TWIN PEAKS IN THE CITY OF SAN FRANCISCO.
HT3042''
HT3042''THE STATION MARK WAS FOUND IN GOOD CONDITION.
HT3042
HT3042                          STATION RECOVERY (1957)
HT3042
HT3042''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1957 (RLE)
HT3042''THE STATION MARK AND REFERENCE MARK 1 WERE RECOVERED AND FOUND
HT3042''TO BE IN GOOD CONDITION.  A NEW REFERENCE MARK 3 WAS ESTABLISHED
HT3042''BY THIS PARTY.  A NEW AND COMPLETE DESCRIPTION FOLLOWS--
HT3042''
HT3042''THE STATION IS LOCATED IN THE W CENTRAL PART OF SAN FRANCISCO,
HT3042''ON THE SUMMIT OF SOUTH TWIN PEAK IN TWIN PEAKS PARK AND 6 FT.
HT3042''E OF A DITCH.  THE MARK PROJECTS ABOUT 3 IN. AND IS STAMPED
HT3042''SOUTH TWIN 2 1954 (NOTE 1C).
HT3042''
HT3042''REFERENCE MARK 1 IS ON THE NE SLOPE OF THE HILL AND ABOUT 12 FT.
HT3042''LOWER THAN THE STATION.  THE MARK IS SET FLUSH WITH THE
HT3042''SURFACE OF THE GROUND AND IS STAMPED SOUTH TWIN NO 1 1932
HT3042''(NOTE 12B).
HT3042''
HT3042''REFERENCE MARK 3 IS ABOUT THE SAME ELEVATION AS THE STATION AND
HT3042''8 FT. W OF A DITCH.  THE MARK IS SET FLUSH WITH THE SURFACE OF
HT3042''THE GROUND AND IS STAMPED SOUTH TWIN 2 NO 3 1932 (NOTE 12B).
HT3042''
HT3042''NO AZIMUTH MARK WAS ESTABLISHED.
HT3042''
HT3042''TO REACH THE STATION FROM THE INTERSECTION OF VAN NESS AVENUE
HT3042''(U.S. HIGHWAY 101) AND MARKET STREET IN SAN FRANCISCO, GO SW
HT3042''AND S ON MARKET STREET FOR 2.7 MI. TO PORTOLA BOULEVARD, CONTINUE
HT3042''S AND SW ON PORTOLA BOULEVARD FOR 0.3 MI. TO TWIN PEAKS
HT3042''BOULEVARD, TURN RIGHT AND GO N ON TWIN PEAKS BOULEVARD FOR 0.8
HT3042''MI. TO A FORK AND A SMALL PARKING AREA ON THE RIGHT, PACK N
HT3042''(UP SMALL HILL) ABOUT 100 YD. TO THE STATION AS DESCRIBED.
HT3042
HT3042                          STATION RECOVERY (1958)
HT3042
HT3042''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 (JCM)
HT3042''STATION WAS RECOVERED IN GOOD CONDITION.
HT3042
HT3042                          STATION RECOVERY (1960)
HT3042
HT3042''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1960 (JCM)
HT3042''THE STATION MARK AND REFERENCE MARKS WERE RECOVERED IN GOOD
HT3042''CONDITION AND THE 1954 AND 1957 DESCRIPTIONS ARE ADEQUATE WITH
HT3042''THE FOLLOWING ADDITION--
HT3042''
HT3042''HEIGHT OF TRIPOD--1 METER
HT3042
HT3042                          STATION RECOVERY (1961)
HT3042
HT3042''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (IRR)
HT3042''THE STATION MARK AND REFERENCE MARKS WERE RECOVERED IN GOOD
HT3042''CONDITION AND THE 1954 AND 1957 DESCRIPTIONS ARE ADEQUATE.
HT3042
HT3042                          STATION RECOVERY (1962)
HT3042
HT3042''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1962 (IRR)
HT3042''THE STATION MARK AND REFERENCE MARKS NUMBER 1 AND 3 WERE
HT3042''RECOVERED IN GOOD CONDITION AND THE 1954 AND 1957 DESCRIPTIONS
HT3042''ARE ADEQUATE.
HT3042
HT3042                          STATION RECOVERY (1964)
HT3042
HT3042''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1964 (EHS)
HT3042''THE STATION MARK, REFERENCE MARK NUMBER 1 (SOUTH TWIN 1932),
HT3042''REFERENCE MARK NUMBER 2 (SOUTH TWIN 1932), AND REFERENCE
HT3042''MARK NUMBER 3 WERE RECOVERED IN GOOD CONDITION.  REFERENCE MARK
HT3042''NUMBER 1 (TWIN PEAK 1954) HAS BEEN DESTROYED AS THE LOWER
HT3042''PART OF THE DRILL HOLE IN WHICH THE MARK WAS SET WAS FOUND BUT
HT3042''THE MARK WAS MISSING.  THE PREVIOUS DESCRIPTIONS ARE ADEQUATE
HT3042''WITH THE FOLLOWING ADDITIONS--
HT3042''
HT3042''REFERENCE MARK NUMBER 2 IS A COAST AND GEODETIC SURVEY DISK
HT3042''STAMPED SOUTH TWIN NO 2 1932 SET IN THE TOP OF A 12-INCH SQUARE
HT3042''CONCRETE POST FLUSH WITH THE GROUND, 4 FEET WEST OF A SHALLOW
HT3042''DITCH AND ABOUT THE SAME ELEVATION AS THE STATION MARK.
HT3042''
HT3042''HEIGHT OF TRIPOD--1 METER
HT3042
HT3042                          STATION RECOVERY (1964)
HT3042
HT3042''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1964 (PAS)
HT3042''THE STATION AND REFERENCE MARKS WERE RECOVERED IN GOOD CONDITION
HT3042''AS DESCRIBED BY R.L.E. IN 1957.
HT3042
HT3042                          STATION RECOVERY (1977)
HT3042
HT3042''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 (CLN)
HT3042''THE STATION MARK AND REFERENCE MARKS 1 AND 2 WERE RECOVERED IN
HT3042''GOOD CONDITION.  THE REFERENCE MARK 3 DISK WAS MISSING BUT THE
HT3042''HOLLOW STEM OF THE MARK WAS FOUND SOLIDLY IN PLACE AND MARKS THE
HT3042''POINT.  THE PREVIOUS DESCRIPTIONS ARE ADEQUATE.
HT3042''
HT3042''AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN
HT3042''AT SAN FRANCISCO.
HT3042
HT3042                          STATION RECOVERY (1977)
HT3042
HT3042''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 (RBM)
HT3042''THE STATION, REFERENCE MARKS 1 AND 2 WERE RECOVERED IN GOOD
HT3042''CONDITION.  ONLY THE SHANK REMAINS OF REFERENCE MARK 3.
HT3042''
HT3042''AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN
HT3042''AT SAN FRANCISCO.
HT3042
HT3042                          STATION RECOVERY (1981)
HT3042
HT3042''RECOVERY NOTE BY NATIONAL OCEAN SERVICE 1981 (DRT)
HT3042''RECOVERED AS DESCRIBED BY J.C. MATHISSON IN 1960.
HT3042''
HT3042''DESCRIBED BY B.H. LUND