KU3532 ***********************************************************************
KU3532  DESIGNATION -  PROSPECT WATER TOWER 1903
KU3532  PID         -  KU3532
KU3532  STATE/COUNTY-  NY/KINGS
KU3532  USGS QUAD   -  BROOKLYN (1979)
KU3532
KU3532                         *CURRENT SURVEY CONTROL
KU3532  ___________________________________________________________________
KU3532* NAD 83(1996)-  40 40 20.70534(N)    073 58 02.44847(W)     ADJUSTED
KU3532* NAVD 88     -        39.     (meters)     128.     (feet)  SCALED
KU3532  ___________________________________________________________________
KU3532  LAPLACE CORR-           2.61  (seconds)                    DEFLEC99
KU3532  GEOID HEIGHT-         -31.83  (meters)                     GEOID99
KU3532
KU3532  HORZ ORDER  -  SECOND
KU3532
KU3532.The horizontal coordinates were established by classical geodetic methods
KU3532.and adjusted by the National Geodetic Survey in January 1999.
KU3532
KU3532.The orthometric height was scaled from a topographic map.
KU3532
KU3532.The Laplace correction was computed from DEFLEC99 derived deflections.
KU3532
KU3532.The geoid height was determined by GEOID99.
KU3532
KU3532;                    North         East     Units   Scale      Converg.
KU3532;SPC NY L     -    56,161.998   302,760.839   MT  0.99999969 +0 01 16.9
KU3532;SPC NY E     -   204,309.417   195,031.614   MT  0.99992495 +0 20 49.8
KU3532;SPC NJ       -   204,309.417   195,031.614   MT  0.99992495 +0 20 49.8
KU3532;UTM  18      - 4,502,906.027   587,276.995   MT  0.99969376 +0 40 23.0
KU3532
KU3532                          SUPERSEDED SURVEY CONTROL
KU3532
KU3532  NAD 83(1996)-  40 40 20.70603(N)    073 58 02.44837(W) AD(       ) 2
KU3532  NAD 83(1992)-  40 40 20.70569(N)    073 58 02.44854(W) AD(       ) 2
KU3532  NAD 83(1986)-  40 40 20.70665(N)    073 58 02.44852(W) AD(       ) 2
KU3532  NAD 27      -  40 40 20.33400(N)    073 58 03.95000(W) AD(       ) 2
KU3532
KU3532.Superseded values are not recommended for survey control.
KU3532.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
KU3532.See file dsdata.txt to determine how the superseded data were derived.
KU3532
KU3532_MARKER: B = BOLT
KU3532_SETTING: 0 = UNSPECIFIED SETTING
KU3532_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
KU3532
KU3532  HISTORY     - Date     Condition        Recov. By
KU3532  HISTORY     - 1903     MONUMENTED       CGS
KU3532  HISTORY     - 1932     SEE DESCRIPTION  CGS
KU3532  HISTORY     - 1932     GOOD             CGS
KU3532  HISTORY     - 1954     SEE DESCRIPTION  CGS
KU3532
KU3532                          STATION DESCRIPTION
KU3532
KU3532''DESCRIBED BY COAST AND GEODETIC SURVEY 1903 (ATM)
KU3532''STATION IS A HIGH MASONRY TOWER WITH A CONICAL APEX, AND IS
KU3532''SITUATED AT THE SE CORNER OF FLATBUSH AVENUE AND EASTERN PARKWAY,
KU3532''BOROUGH OF BROOKLYN, KINGS COUNTY, NEW YORK CITY.  IT WAS
KU3532''OCCUPIED AT VARIOUS TIMES DURING 1903, 1904, 1905 AND 1907 BY
KU3532''MR. FREDERICK W. KOOP, ASSISTANT ENGINEER, WHO DETERMINED THE
KU3532''STATION BY SUSPENDING A HEAVY PLUMB BOB FROM THE APEX OF THE
KU3532''TOWER.  THE STATION WAS ALSO CHECKED BY PLUMBING THE APEX DOWN
KU3532''WITH A TRANSIT.  THE STATION WAS MARKED BY A COPPER BOLT 1/2
KU3532''INCH IN DIAMETER, COUNTERSUNK IN THE CONCRETE FLOOR AND
KU3532''FASTENED WITH SOLDER.
KU3532''
KU3532''STATION IS REACHED BY FLATBUSH AVENUE TROLLEY FROM BROOKLYN
KU3532''BRIDGE, GETTING OFF AT EASTERN PARKWAY.
KU3532
KU3532                          STATION RECOVERY (1932)
KU3532
KU3532''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1932 (FLG)
KU3532''THIS TOWER WAS TORN DOWN IN 1930.  A LARGE BRASS DISK, SET IN A
KU3532''GRANITE POST, WHICH IS EMBEDDED IN CEMENT NOW MARKS THE
KU3532''STATION.  THIS MARK WAS SET BY THE BOROUGH ENGINEERS.  THE
KU3532''FOLLOWING NOTATION WAS MADE ON THE DISK--CENTER OF COORDINATES
KU3532''FOR BROOKLYN.  THE TABLET IS 8 INCHES IN DIAMETER.
KU3532''
KU3532''IT IS LOCATED NEAR THE FOOT OF THE SLOPE OF THE RESERVOIR
KU3532''EMBANKMENT, ON THE NW SIDE.  THE WATER COMMISSION MAINTAINS AN
KU3532''OFFICE IN THE RED BRICK BUILDING ON THE S SIDE OF THE EMBANKMENT.
KU3532
KU3532                          STATION RECOVERY (1932)
KU3532
KU3532''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1932 (RWW)
KU3532''RECOVERED IN EXCELLENT CONDITION, FROM THE ORIGINAL
KU3532''DESCRIPTION.  THE STATION HAS BEEN ACCURATELY RE-MARKED BY THE
KU3532''BOROUGH ENGINEER.
KU3532''
KU3532''A COMPLETE DESCRIPTION FOLLOWS--THIS STATION IS LOCATED IN
KU3532''THE PARK SLOPE SECTION OF BROOKLYN, JUST E OF GRAND ARMY PLAZA
KU3532''BETWEEN EASTERN PARKWAY AND FLATBUSH AVENUE.  IT IS ON THE THIRD
KU3532''TERRACE OF THE LAWN IN THE NW CORNER OF THE PROSPECT PARK
KU3532''RESERVOIR GROUNDS.  THE HIGH MASONRY TOWER, WHICH FORMERLY
KU3532''MARKED THE STATION HAS BEEN RAZED.  PRIOR TO THE RAZING OF THIS
KU3532''TOWER THE STATION WAS ADEQUATELY REFERENCED WITH 1ST ORDER
KU3532''ACCURACY TO PERMIT PRECISE REESTABLISHMENT.
KU3532''
KU3532''STATION IS NOW MARKED BY THE CENTER HOLE IN AN 8-INCH ROUND
KU3532''METAL DISK STAMPED BOROUGH BROOKLYN-U.S.C. AND G.S., WITH A
KU3532''DIRECTION ARROW POINTING N, SET IN AN 8-FOOT OCTAGONAL WHITE
KU3532''GRANITE SHAFT SET IN CONCRETE AND PROJECTING 10 INCHES ABOVE
KU3532''GROUND.
KU3532''
KU3532''THIS STATION IS THE POINT OF ORIGIN FOR BOROUGH OF BROOKLYN
KU3532''SURVEYS.
KU3532
KU3532                          STATION RECOVERY (1954)
KU3532
KU3532''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1954 (JB)
KU3532''STATION WAS RECOVERED IN GOOD CONDITION.  REVISE THE DESCRIPTION
KU3532''AS FOLLOWS--
KU3532''
KU3532''STATION IS LOCATED IN THE NW SECTION OF MT. PROSPECT PARK, SE
KU3532''OF THE INTERSECTION OF UNDERHILL AVENUE AND EASTERN PARKWAY.  THERE
KU3532''IS A LIMESTONE RETAINING WALL E OF THE BROOKLYN PUBLIC LIBRARY,
KU3532''CENTRAL BRANCH, AND THE MARK IS 38 FT. E OF THIS WALL FROM A
KU3532''POINT 80 FT. S OF THE N END.  THE STATION IS MARKED BY A CROSS
KU3532''CUT IN A 1-IN. BRASS PLUG SET IN A 48-IN. GRANITE POST.  THE
KU3532''TOP OF THE POST IS HEXAGONAL AND EXTENDS ABOUT 10 IN. ABOVE THE
KU3532''GROUND.  THE CROSS CUT IS ABOUT 1/4 IN. NE OF A SMALL DRILL
KU3532''HOLE IN THE CENTER OF THE PLUG.  ON TOP OF THE GRANITE POST AND
KU3532''AROUND THE PLUG THERE IS A 9-IN. BRASS PLATE, WITH AN
KU3532''ARROW POINTING N, WITH THE FOLLOWING INSCRIPTION--PROSPECT
KU3532''WATER TOWER ORIGIN OF CO-ORDINATES - BROOKLYN USC AND GS
KU3532''NO 2.  THE PLATE WAS CONSTRUCTED WITH A 1-1/2-IN. HOLE IN
KU3532''THE CENTER TO FIT AROUND THE BRASS PLUG.  THE ARROW IS AT
KU3532''THE APEX OF A TRIANGLE AROUND THE HOLE.
KU3532''
KU3532''A BRIEF HISTORY OF THE STATION--ORIGINALLY, THE STATION WAS
KU3532''THE CENTER OF THE TOP OF A HIGH WATER TOWER AT A RESERVOIR
KU3532''SITE.  IN 1930, THE WATER TOWER WAS RAZED BY MUNICIPAL
KU3532''AUTHORITIES.  BEFORE THE TOWER WAS DEMOLISHED, ENGINEERS OF THE
KU3532''BROOKLYN BUREAU OF HIGHWAYS AND SEWERS REFERENCED THE
KU3532''TRIANGULATION STATION BY MARKS IN THE NEARBY RETAINING WALL AND
KU3532''REMARKED THE STATION IN DECEMBER 1931 BY THE PRESENT GRANITE
KU3532''POST WITH A COPPER PLUG AND PLATE.  A SMALL HOLE WAS PUNCHED IN
KU3532''THE CENTER OF THE PLUG TO MARK THE TRIANGULATION STATION.
KU3532''SEVERAL YEARS LATER, THE ENTIRE MARK WAS REMOVED BECAUSE OF A
KU3532''LANDSCAPING PROJECT.  WHEN TERRACING HAD BEEN COMPLETED, THE
KU3532''GRANITE POST WAS RESET IN 1937 BY THE PARK DEPARTMENT AT AN
KU3532''ELEVATION 8 FT. LOWER THAN THAT OF 1931.  IN 1939, THE
KU3532''BROOKLYN BUREAU OF HIGHWAYS AND SEWERS CHECKED THE POSITION
KU3532''AND REMARKED THE CENTER OF THE STATION BY THE CROSS CUT IN THE
KU3532''PLUG JUST NE OF THE CENTER HOLE.
KU3532''
KU3532''PERSONNEL OF THE EASTERN DISTRICT OFFICE RECOVERED THE STATION
KU3532''A YEAR AGO.  THE ARROW ON THE 9-IN. PLATE WAS NOTED TO BE
KU3532''POINTING S INSTEAD OF N.  THE POST MUST HAVE BEEN TURNED AROUND
KU3532''WHEN RESET IN 1937.  THE BROOKLYN BUREAU OF HIGHWAYS AND SEWERS
KU3532''RESET THE PLATE IN DECEMBER 1953 TO HAVE THE ARROW POINT N AS
KU3532''INTENDED.  IN MY PRESENCE, MEASUREMENTS WERE MADE TO REFERENCE
KU3532''CUTS IN THE RETAINING WALL BY THE BROOKLYN ENGINEERS WHO
KU3532''CHECKED THE CROSS IN THE PLUG.
KU3532''
KU3532''MR. J. MILTON PETERSON OF THE BROOKLYN BUREAU OF HIGHWAYS AND
KU3532''SEWERS HAS THE RECORDS OF THE TRIANGULATION STATION REMARKING
KU3532''AND CHECKING.  HE WENT TO CONSIDERABLE TROUBLE LOOKING UP OLD
KU3532''REPORTS TO GET THE RECORD STRAIGHT.