SOURCE: NAVD88 (Computed using GEOID12B)

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2 Shared Solution 1 of 1 10/2/2018, 2:52 PM Shared Solution PID: Designation: NYKT R1 Stamping: NYKT R Stability: May hold commonly subject to ground movement Setting: Retaining wall or concrete ledge Mark Condition: G Description: Observed: T12:39:00Z See Also Source: OPUS - page Close-up View REF_FRAME: NAD_83(2011) EPOCH: SOURCE: NAVD88 (Computed using GEOID12B) UNITS: m SET PROFILE DETAILS LAT: 41 56' " ± m LON: -74 1' " ± m ELL HT: ± m X: ± m Y: ± m Z: ± m ORTHO HT: ± m UTM 18 SPC 3101(NY E) NORTHING: m m EASTING: m m CONVERGENCE: POINT SCALE: COMBINED FACTOR: CONTRIBUTED BY patrick.magee NYS Department of Transportation Horizon View The numerical values for this position solution have satisfied the quality control criteria of the National Geodetic Survey. The contributor has verified that the information submitted is accurate and complete.

3 1 of 2 10/2/2018, 2:46 PM The NGS Data Sheet See file dsdata.pdf for more information about the datasheet. PROGRAM = datasheet95, VERSION = National Geodetic Survey, Retrieval Date = OCTOBER 2, 2018 *********************************************************************** DESIGNATION - NYKT R1 PID - STATE/COUNTY- NY/ULSTER COUNTRY - US USGS QUAD - KINGSTON WEST (1980) *CURRENT SURVEY CONTROL * NAD 83(1986) POSITION (N) (W) HD_HELD1 * NAVD 88 ORTHO HEIGHT (meters) (feet) ADJUSTED GEOID HEIGHT (meters) GEOID12B DYNAMIC HEIGHT (meters) (feet) COMP MODELED GRAVITY - 980,266.5 (mgal) NAVD 88 VERT ORDER - SECOND CLASS II.The horizontal coordinates were determined by differentially corrected.hand held GPS observations or other comparable positioning techniques.and have an estimated accuracy of +/- 3 meters...the orthometric height was determined by differential leveling and.adjusted by the NATIONAL GEODETIC SURVEY.in March No vertical observational check was made to the station..significant digits in the geoid height do not necessarily reflect accuracy..geoid12b height accuracy estimate available here..the dynamic height is computed by dividing the NAVD 88.geopotential number by the normal gravity value computed on the.geodetic Reference System of 1980 (GRS 80) ellipsoid at 45.degrees latitude (g = gals.)..the modeled gravity was interpolated from observed gravity values. ; North East Units Estimated Accuracy ;SPC NY E - 344, ,906.9 MT (+/- 3 meters HH1 GPS) _U.S. NATIONAL GRID SPATIAL ADDRESS: 18TWM (NAD 83) SUPERSEDED SURVEY CONTROL.No superseded survey control is available for this station. _MARKER: DB = BENCH MARK DISK _SETTING: 32 = SET IN A RETAINING WALL OR CONCRETE LEDGE _SP_SET: RETAINING WALL _STAMPING: NYKT R _MARK LOGO: USGS _MAGNETIC: N = NO MAGNETIC MATERIAL _STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO +STABILITY: SURFACE MOTION

4 2 of 2 10/2/2018, 2:46 PM _SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR +SATELLITE: SATELLITE OBSERVATIONS - December 11, 2006 HISTORY - Date Condition Report By HISTORY MONUMENTED TVGA HISTORY GOOD NYDT STATION DESCRIPTION 'DESCRIBED BY TVGA ENGINEERING SURVEYING PC 2005 'FROM THE INTERSECTION OF HURLEY AVE. AND WASHINGTON AVE. IN THE TOWN 'OF KINGSTON GO 0.3 MILES ALONG HURLEY AVE. TO QUARRY ST. ON THE LEFT, 'TURN LEFT ON QUARRY ST. AND GO 100 FEET TO THE NEW YORK STATE 'DEPARTMENT OF TRANSPORTATION RESIDENCY ON THE LEFT. THE STATION IS AN 'ALUMINUM DISK SET IN THE NORTH EDGE OF A CONCRETE RETAINING WALL BY 'THE ELEVATED PART OF THE PARKING LOT. ' 'THE STATION IS METERS NORTH OF A METAL SHED, METERS EAST 'OF THE WEST EDGE OF RETAINING WALL AND METERS SOUTHEAST OF THE 'BRICK DOT BUILDING. STATION RECOVERY (2006) 'RECOVERY NOTE BY NY DEPT OF TRANSP 2006 (RC) 'RECOVERED AS DESCRIBED. *** retrieval complete. Elapsed Time = 00:00:04

5 1 of 3 10/2/2018, 2:15 PM The NGS Data Sheet See file dsdata.pdf for more information about the datasheet. PROGRAM = datasheet95, VERSION = National Geodetic Survey, Retrieval Date = OCTOBER 2, 2018 *********************************************************************** HT_MOD - This is a Height Modernization Survey Station. DESIGNATION - HENNING PID - STATE/COUNTY- VA/FAIRFAX COUNTRY - US USGS QUAD - ANNANDALE (1994) *CURRENT SURVEY CONTROL * NAD 83(2011) POSITION (N) (W) ADJUSTED * NAD 83(2011) ELLIP HT (meters) (06/27/12) ADJUSTED * NAD 83(2011) EPOCH * NAVD 88 ORTHO HEIGHT (meters) (feet) GPS OBS NAVD 88 orthometric height was determined with geoid model GEOID03 GEOID HEIGHT (meters) GEOID03 GEOID HEIGHT (meters) GEOID12B NAD 83(2011) X - 1,100, (meters) COMP NAD 83(2011) Y - -4,849, (meters) COMP NAD 83(2011) Z - 3,981, (meters) COMP LAPLACE CORR (seconds) DEFLEC12B Network accuracy estimates per FGDC Geospatial Positioning Accuracy Standards: FGDC (95% conf, cm) Standard deviation (cm) CorrNE Horiz Ellip SD_N SD_E SD_h (unitless) NETWORK Click here for local accuracies and other accuracy information..the horizontal coordinates were established by GPS observations.and adjusted by the National Geodetic Survey in June NAD 83(2011) refers to NAD 83 coordinates where the reference frame has.been affixed to the stable North American tectonic plate. See.NA2011 for more information..the horizontal coordinates are valid at the epoch date displayed above.which is a decimal equivalence of Year/Month/Day..The orthometric height was determined by GPS observations and a.high-resolution geoid model using precise GPS observation and.processing techniques..significant digits in the geoid height do not necessarily reflect accuracy..geoid12b height accuracy estimate available here..the X, Y, and Z were computed from the position and the ellipsoidal ht..the Laplace correction was computed from DEFLEC12B derived deflections..the ellipsoidal height was determined by GPS observations

6 2 of 3 10/2/2018, 2:15 PM.and is referenced to NAD 83.. The following values were computed from the NAD 83(2011) position. ; North East Units Scale Factor Converg. ;SPC VA N - 2,134, ,611, MT ;SPC VA N - 7,003, ,848, sft ;UTM 18-4,304, , MT ! - Elev Factor x Scale Factor = Combined Factor!SPC VA N x = !UTM x = _U.S. NATIONAL GRID SPATIAL ADDRESS: 18SUJ (NAD 83) SUPERSEDED SURVEY CONTROL NAD 83(2007) (N) (W) AD( ) 1 ELLIP H (02/20/09) (m) GP( ) 4 2 NAD 83(1993) (N) (W) AD( ) 1 ELLIP H (01/15/08) (m) GP( ) 4 2.Superseded values are not recommended for survey control..ngs no longer adjusts projects to the NAD 27 or NGVD 29 datums..see file dsdata.pdf to determine how the superseded data were derived. _MARKER: DD = SURVEY DISK _SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT _STAMPING: HENNING _MARK LOGO: VA-059 _PROJECTION: FLUSH _MAGNETIC: R = STEEL ROD IMBEDDED IN MONUMENT _STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO +STABILITY: SURFACE MOTION _SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR +SATELLITE: SATELLITE OBSERVATIONS - August 20, 2008 HISTORY - Date Condition Report By HISTORY MONUMENTED GWS HISTORY GOOD GEOMET STATION DESCRIPTION 'DESCRIBED BY GW STEPHENS JR AND ASSOCIATES 2005 'THE STATION LIES IN EAST CENTRAL FAIRFAX COUNTY, IN THE FAIRVIEW PARK 'AREA, APPROXIMATELY 2.5 MILES (4.0 KM) SOUTHWEST OF FALLS CHURCH AND '3.2 MI (5.15 KM) SOUTHEAST OF VIENNA. TO REACH THE STATION FROM THE 'INTERSECTION OF THE EAST BOUND LANES OF U.S.ROUTE 50 (ARLINGTON 'BOULEVARD) AND THE INTERSTATE HIGHWAY 495 (CAPITAL BELTWAY)OVERPASS AT 'EXIT 50, PROCEED EASTERLY, RIGHT ALONG THE EXIT RAMP FROM U.S. ROUTE '50 FOR FAIRVIEW PARK DRIVE FOR 0.13 MILES (0.2 KM) TO A SPLIT. 'PROCEED STRAIGHT ALONG THE RIGHT FORK FOR 0.15 MILES (0.2 KM) TO 'ANOTHER SPLIT. BEAR LEFT AT THE SPLIT AND PROCEED 420 FEET (128 M) TO 'A TRAFFIC LIGHT. PROCEED STRAIGHT THROUGH THE TRAFFIC LIGHT ONTO 'FAIRVIEW PARK DRIVE NORTHERLY FOR 0.20 MILES (0.3 KM) TO A TRAFFIC 'LIGHT. PROCEED STRAIGHT THROUGH THE TRAFFIC LIGHT ALONG FAIRVIEW PARK 'DRIVE NORTHWESTERLY AND NORTHERLY FOR 0.35 MILES (0.55 KM) TO THE 'STATION ON THE RIGHT IN A GRASS AREA SOUTH OF A TURN AROUND. THE 'STATION MARK IS A CENTER PUNCH IN THE CENTER OF A STANDARD FAIRFAX 'COUNTY SURVEY DISK SET IN THE CENTER OF A 12 INCH (30 CM) DIAMETER 'CONCRETE MONUMENT FLUSH TO THE GROUND. IT IS 4.3 FEET (1.31 M) 'SOUTHWEST FROM THE END OF CURB ON THE SOUTH SIDE OF THE TURNAROUND, '47.7 FEET (14.54 M) NORTHEAST FROM THE CENTERLINE OF A STORM DRAIN 'ACCESS COVER ON THE EAST SIDE OF FAIRVIEW PARK DRIVE, 23.8 FEET (7.25

7 3 of 3 10/2/2018, 2:15 PM 'M) SOUTHWEST FROM A SANITARY SEWER MANHOLE ACCESS COVER, AND 51.2 FEET '(15.61 M) NORTHEAST FROM A 6 MAPLE TREE. STATION RECOVERY (2008) 'RECOVERY NOTE BY GEOMETRICS GPS INCORPORATED 2008 (KRO) 'RECOVERED IN GOOD CONDITION. *** retrieval complete. Elapsed Time = 00:00:05