1 National Geodetic Survey, Retrieval Date = NOVEMBER 1, 2005 DH6849 *********************************************************************** DH6849 HT_MOD - This is a Height Modernization Survey Station. DH6849 DESIGNATION - WCA3 11 DH6849 PID - DH6849 DH6849 STATE/COUNTY- FL/DE SOTO DH6849 USGS QUAD - NORTH OF FORTYMILE B (1995) DH6849 DH6849 *CURRENT SURVEY CONTROL DH6849 ___________________________________________________________________ DH6849* NAD 83(1999)- 25 57 04.91056(N) 080 48 40.94421(W) ADJUSTED DH6849* NAVD 88 - 2.54 (meters) 8.3 (feet) GPS OBS DH6849 ___________________________________________________________________ DH6849 X - 916,379.722 (meters) COMP DH6849 Y - -5,665,024.206 (meters) COMP DH6849 Z - 2,774,208.427 (meters) COMP DH6849 LAPLACE CORR- -0.46 (seconds) DEFLEC99 DH6849 ELLIP HEIGHT- -21.89 (meters) (09/12/05) GPS OBS DH6849 GEOID HEIGHT- -24.42 (meters) GEOID03 DH6849 DH6849 HORZ ORDER - FIRST DH6849 ELLP ORDER - THIRD CLASS I DH6849 DH6849.The horizontal coordinates were established by GPS observations DH6849.and adjusted by the FL DEPT OF ENV PRO in September 2005. DH6849 DH6849.The orthometric height was determined by GPS observations and a DH6849.high-resolution geoid model using precise GPS observation and DH6849.processing techniques. DH6849 DH6849.The X, Y, and Z were computed from the position and the ellipsoidal ht. DH6849 DH6849.The Laplace correction was computed from DEFLEC99 derived deflections. DH6849 DH6849.The ellipsoidal height was determined by GPS observations DH6849.and is referenced to NAD 83. DH6849 DH6849.The geoid height was determined by GEOID03. DH6849 DH6849; North East Units Scale Factor Converg. DH6849;SPC FL W - 179,767.343 319,049.842 MT 1.00011611 +0 31 12.8 DH6849;UTM 17 - 2,870,311.336 518,885.099 MT 0.99960440 +0 04 57.2 DH6849 DH6849! - Elev Factor x Scale Factor = Combined Factor DH6849!SPC FL W - 1.00000344 x 1.00011611 = 1.00011955 DH6849!UTM 17 - 1.00000344 x 0.99960440 = 0.99960784 DH6849 DH6849 SUPERSEDED SURVEY CONTROL DH6849 DH6849.No superseded survey control is available for this station. DH6849 DH6849_U.S. NATIONAL GRID SPATIAL ADDRESS: 17RNJ1888570311(NAD 83) DH6849_MARKER: F = FLANGE-ENCASED ROD DH6849_SETTING: 15 = METAL ROD DRIVEN INTO GROUND. SEE TEXT FOR ADDITIONAL DH6849+WITH SETTING: INFORMATION. DH6849_STAMPING: WCA3-11 2005 DH6849_MARK LOGO: NGS DH6849_PROJECTION: PROJECTING 48 CENTIMETERS DH6849_MAGNETIC: M = MARKER EQUIPPED WITH BAR MAGNET DH6849_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL DH6849_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR DH6849+SATELLITE: SATELLITE OBSERVATIONS - March 01, 2005 DH6849_ROD/PIPE-DEPTH: 2.6 meters DH6849 DH6849 HISTORY - Date Condition Report By DH6849 HISTORY - 20050301 MONUMENTED FLDEP DH6849 DH6849 STATION DESCRIPTION DH6849 DH6849'DESCRIBED BY FL DEPT OF ENV PRO 2005 (RH) DH6849'THE MARK IS ABOUT 41.6 MI WSW OF THE FORT LAUDERDALE-HOLLYWOOD DH6849'INTERNATIONAL AIRPORT, 35.5 MI NORTHWEST OF THE MIAMI INTERNATIONAL DH6849'AIRPORT, THIS MARK IS IN UNSURVEYED LANDS, NO SECTION, TOWNSHIP OR DH6849'RANGE GIVEN. DH6849' DH6849'TO REACH THE MARK FROM THE INTERSECTION OF U.S. HIGHWAY 41 (TAMIAMI DH6849'TRAIL) AND THE FLORIDA TURNPIKE (STATE ROAD 821) IN WESTERN MIAMI, GO DH6849'WEST ON U.S. HIGHWAY 41 FOR 5.8 MI TO THE INTERSECTION OF STATE ROAD DH6849'997 (KROME AVENUE, SW 177 AVENUE), CONTINUE WEST ON U.S. HIGHWAY 41 DH6849'FOR 14.9 MI TO THE BRIDGE AND WATER CONTROL STRUCTURE S12C, CONTINUE DH6849'WEST ON U.S. HIGHWAY 41 FOR 0.1 MI TO A BOAT RAMP ON THE RIGHT (NORTH DH6849'SIDE OF U.S. HIGHWAY 41), (NAD83 COORDINATES OF THE BOAT RAMP IS DH6849'NORTH 25 45 44.2, WEST 080 43 45.4), NOW BY AIRBOAT CROSSING THE DH6849'CANAL THAT PARALLELS U.S. HIGHWAY 41 AND GO ALONG VARIOUS AIRBOAT DH6849'TRAILS TO THE MARK, THE MARK IS APPROXIMATELY 14.1 MI NORTHEAST OF THE DH6849'BOAT RAMP IN A STRAIGHT LINE, (NAD83 COORDINATES OF THE MARK IS NORTH DH6849'25 57 04.91056, WEST 080 48 40.94421), A STAINLESS STEEL ROD WAS DH6849'DRIVEN TO REFUSAL TO A DEPTH OF 8.5 FT WITH AN NGS LOGO CAP THAT DH6849'PROJECTS 1.6 FT ABOVE THE MUD BOTTOM, THE DATUM POINT IS RECESSED 0.3 DH6849'FT BELOW THE LEVEL OF THE NGS LOGO CAP, A TRIANGLE SHAPED WOOD DH6849'PLATFORM WAS BUILT AROUND THE MARK AND ROCKS WERE POURED INSIDE OF DH6849'THE PVC PIPE TO STABILIZE THE STAINLESS STEEL ROD. THE MARK CAN ALSO DH6849'BE REACHED FROM THE INTERSECTION OF INTERSTATE 75 (EVERGLADES ALLEY) DH6849'AND U.S. HIGHWAY 27 IN ANDYTOWN, GO WEST ON INTERSTATE 75 FOR 1.7 MI DH6849'TO A TOLL BOOTH, CONTINUE WEST ON INTERSTATE 75 FOR 10.3 MI TO A DH6849'RECREATIONAL AND REST AREA EXIT NEAR MILE MARKER 35, (THE EXIT IS ON DH6849'THE NORTH SIDE OF THE INTERSTATE AND THE REST AREA IS ON THE SOUTH DH6849'SIDE OF THE INTERSTATE), EXIT RIGHT OFF THE INTERSTATE AND GO WEST FOR DH6849'0.8 MI TO THE MIAMI CANAL, TURN LEFT AND GO SOUTH MAKING A U-TURN DH6849'UNDER INTERSTATE 75, NOW GOING EAST FOR 0.45 MI TO A STOP SIGN, TURN DH6849'LEFT AND GO NORTH THEN WEST FOR 0.25 MI ALONG THE SERVICE ROAD THAT DH6849'PARALLELS INTERSTATE 75 TO THE BRIDGE OVER THE MIAMI CANAL, CONTINUE DH6849'WEST ALONG THE SERVICE ROAD FOR 0.4 MI TO A PARKING LOT, TURN LEFT DH6849'INTO THE PARKING LOT AND GO SOUTH TO THE MOST WESTERLY BOAT RAMP AT A DH6849'RECREATIONAL AREA, THE BOAT RAMP IS THE WESTERLY MOST RAMP ON THE DH6849'SOUTH SIDE OF THE INTERSTATE AT THE RECREATIONAL-REST AREA, (NAD83 DH6849'COORDINATES OF THE BOAT RAMP IS NORTH 26 08 41.3, WEST 080 38 16.3), DH6849'NOW BY AIRBOAT GO ALONG VARIOUS AIRBOAT TRAILS TO THE MARK, THE MARK DH6849'IS LOCATED APPROXIMATELY 17.2 MI SOUTHWEST OF THE BOAT RAMP IN A DH6849'STRAIGHT LINE. DH6849' DH6849'LOCATED 1.5 FT SOUTH OF A NGS WITNESS POST. DH6849' DH6849'NOTE USING A GPS RECEIVER AND THE COORDINATES OF THE MARK IS THE BEST DH6849'AND MAYBE ONLY METHOD OF FINDING THE MARK. DH6849' DH6849'NOTE TWO MAGNETS WERE PLACED INSIDE THE 5-INCH NGS LOGO CAP.