National Geodetic Survey, Retrieval Date = JUNE 10, 2002 HV1668 *********************************************************************** HV1668 DESIGNATION - BOUNDRY MARK 14 DC VA HV1668 PID - HV1668 HV1668 STATE/COUNTY- VA/C OF ALEXANDRIA HV1668 USGS QUAD - ALEXANDRIA (1994) HV1668 HV1668 *CURRENT SURVEY CONTROL HV1668 ___________________________________________________________________ HV1668* NAD 83(1993)- 38 47 28.24638(N) 077 02 22.23411(W) ADJUSTED HV1668* NAVD 88 - 2.472 (meters) 8.11 (feet) ADJUSTED HV1668 ___________________________________________________________________ HV1668 LAPLACE CORR- -3.34 (seconds) DEFLEC99 HV1668 GEOID HEIGHT- -32.21 (meters) GEOID99 HV1668 DYNAMIC HT - 2.471 (meters) 8.11 (feet) COMP HV1668 MODELED GRAV- 980,088.0 (mgal) NAVD 88 HV1668 HV1668 HORZ ORDER - SECOND HV1668 VERT ORDER - FIRST CLASS II HV1668 HV1668.The horizontal coordinates were established by classical geodetic methods HV1668.and adjusted by the National Geodetic Survey in November 1994. HV1668 HV1668.The orthometric height was determined by differential leveling HV1668.and adjusted by the National Geodetic Survey in June 1991. HV1668.WARNING-Repeat measurements at this control monument indicate possible HV1668.vertical movement. HV1668 HV1668.The Laplace correction was computed from DEFLEC99 derived deflections. HV1668 HV1668.The geoid height was determined by GEOID99. HV1668 HV1668.The dynamic height is computed by dividing the NAVD 88 HV1668.geopotential number by the normal gravity value computed on the HV1668.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 HV1668.degrees latitude (g = 980.6199 gals.). HV1668 HV1668.The modeled gravity was interpolated from observed gravity values. HV1668 HV1668; North East Units Scale Converg. HV1668;SPC VA N - 2,125,829.511 3,626,876.759 MT 0.99995297 +0 54 41.5 HV1668;SPC MD - 124,826.212 396,567.567 MT 0.99995093 -0 01 29.3 HV1668;SPC MD - 409,534.00 1,301,072.09 sFT 0.99995093 -0 01 29.3 HV1668;UTM 18 - 4,295,579.479 322,869.238 MT 0.99998637 -1 16 41.0 HV1668 HV1668: Primary Azimuth Mark Grid Az HV1668:SPC VA N - MASONIC PB AND PP 1931 307 30 56.6 HV1668:SPC MD - MASONIC PB AND PP 1931 308 27 07.4 HV1668:UTM 18 - MASONIC PB AND PP 1931 309 42 19.1 HV1668 HV1668|---------------------------------------------------------------------| HV1668| PID Reference Object Distance Geod. Az | HV1668| dddmmss.s | HV1668| HV1670 DC VA BOUNDARY MK 14 RM 2 12.888 METERS 26527 | HV1668| HV4632 MASONIC PB AND PP 1931 APPROX. 2.9 KM 3082538.1 | HV1668| HV1669 BOUNDARY WITNESS MK 14 DC VA RM 1 13.826 METERS 35637 | HV1668|---------------------------------------------------------------------| HV1668 HV1668 SUPERSEDED SURVEY CONTROL HV1668 HV1668 NAD 83(1993)- 38 47 28.24459(N) 077 02 22.23541(W) AD( ) 2 HV1668 NAD 83(1986)- 38 47 28.24494(N) 077 02 22.24731(W) AD( ) 2 HV1668 NAD 27 - 38 47 27.83400(N) 077 02 23.32300(W) AD( ) 2 HV1668 NGVD 29 - 2.710 (m) 8.89 (f) ADJUSTED 1 2 HV1668 HV1668.Superseded values are not recommended for survey control. HV1668.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. HV1668.See file dsdata.txt to determine how the superseded data were derived. HV1668 HV1668_MARKER: DE = TRAVERSE STATION DISK HV1668_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT HV1668_STAMPING: DC VA BOUNDARY 14 WITNESS 1947 HV1668_MARK LOGO: CGS HV1668_MAGNETIC: M = MARKER EQUIPPED WITH BAR MAGNET HV1668_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO HV1668+STABILITY: SURFACE MOTION HV1668_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR HV1668+SATELLITE: SATELLITE OBSERVATIONS - January 15, 1990 HV1668 HV1668 HISTORY - Date Condition Report By HV1668 HISTORY - 1946 MONUMENTED CGS HV1668 HISTORY - 1947 GOOD CGS HV1668 HISTORY - 1948 GOOD CGS HV1668 HISTORY - 1958 GOOD CGS HV1668 HISTORY - 1965 GOOD CGS HV1668 HISTORY - 1974 GOOD NGS HV1668 HISTORY - 19900115 GOOD RDA HV1668 HISTORY - 19960803 GOOD USPSQD HV1668 HV1668 STATION DESCRIPTION HV1668 HV1668'DESCRIBED BY COAST AND GEODETIC SURVEY 1946 HV1668'AT ALEXANDRIA. HV1668'AT ALEXANDRIA, AT JONES POINT, 0.9 MILE SOUTH ALONG THE POTOMAC HV1668'RIVER FROM THE FOOT OF PRINCE STREET, 205.0 FEET NORTH OF THE HV1668'NORTHEAST CORNER OF THE FENCE AROUND THE STEEL TOWER SUPPORTING HV1668'THE JONES POINT NAVIGATION LIGHT, 45.5 FEET SOUTH OF REFERENCE HV1668'MARK NO. 1, 3.6 FEET SOUTHWEST OF THE NORTH END OF THE FENCE HV1668'WHICH BORDERS THE SOUTH AND EAST SIDES OF THE POINT, SET IN THE HV1668'TOP OF A CONCRETE POST WHICH PROJECTS 2.8 FEET ABOVE THE GROUND. HV1668 HV1668 STATION RECOVERY (1947) HV1668 HV1668'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1947 (RCB) HV1668'STATION DC VA BOUNDARY WM 14 IS LOCATED ON JONES POINT WHICH IS ON HV1668'THE W BANK OF THE POTOMAC RIVER AND ABOUT 1/2 MILE SE OF THE CITY OF HV1668'ALEXANDRIA. THE STATION IS 205 FEET N OF THE NE CORNER OF THE FENCE HV1668'AROUND JONES POINT NAVIGATION LIGHT. IT IS 3.6 FEET SW OF THE N END HV1668'OF THE FENCE LINE ALONG W BANK OF THE POTOMAC RIVER AND IT HV1668'PROJECTS 2.8 FEET ABOVE THE SURFACE OF THE GROUND. IT IS A HV1668'BRONZE STATION DISK STAMPED DC VA BOUNDARY MARK NO 14 WITNESS HV1668'1946 AND IS SET IN THE TOP OF A CONCRETE POST. HV1668' HV1668'R.M. 1 IS 45.36 FEET N OF THE STATION AND 252.5 FEET N OF THE HV1668'NE CORNER OF A FENCE AROUND THE STEEL TOWER SUPPORTING THE HV1668'JONES POINT NAVIGATION LIGHT. IT IS 15 FEET W OF THE W BANK HV1668'OF THE POTOMAC RIVER. IT IS A BRONZE REFERENCE DISK STAMPED HV1668'DC VA BOUNDARY MARK NO 1 WITNESS 1946 AND IS SET IN THE TOP OF A HV1668'CONCRETE POST. HV1668' HV1668'R.M. 2 IS 42.28 FEET W OF THE STATION AND IS 204.5 FEET N OF HV1668'THE CENTER OF THE N FACE OF THE FENCE WHICH IS AROUND THE STEEL HV1668'TOWER SUPPORTING THE JONES POINT RIGHT NAVIGATION LIGHT. IT IS HV1668'45.2 FEET W OF THE N END OF THE FENCE ALONG THE W BANK OF THE HV1668'POTOMAC RIVER. IT IS A BRONZE REFERENCE DISK STAMPED DC VA HV1668'BOUNDARY MARK NO 2 1946 AND IS SET IN CONCRETE FLUSH WITH THE HV1668'GROUND. HV1668' HV1668'HEIGHT OF LIGHT ABOVE STATION MARK - 1 METER. HV1668 HV1668 STATION RECOVERY (1948) HV1668 HV1668'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1948 (RJS) HV1668'STATION RECOVERED IN GOOD CONDITION. THE 1947 DESCRIPTION HV1668'IS ADEQUATE WITH THE FOLLOWING CHANGES-- HV1668' HV1668'1. CHANGE STATION MARK STAMPING FROM D.C.-VA. BOUNDARY MARK HV1668'NO. 14 1946 TO C.D.-VA. BOUNDARY WITNESS NO. 14 1947. HV1668' HV1668'2. CHANGE R.M. 1 STAMPING FROM D.C.-VA. BOUNDARY MARK NO 1 1946 HV1668'TO D.C.-VA. BOUNDARY WITNESS NO 1 1946. HV1668' HV1668'3. CHANGE R.M. 2 STAMPDING FROM D.C.-VA. BOUNDARY MARK NO 2 1946 HV1668'TO D.C.-VA. BOUNDARY NO 2 1947. HV1668 HV1668 STATION RECOVERY (1958) HV1668 HV1668'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 HV1668'RECOVERED IN GOOD CONDITION. HV1668 HV1668 STATION RECOVERY (1965) HV1668 HV1668'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1965 (DCW) HV1668'STATION AND R.M. 2 WERE RECOVERED AS DESCRIBED, R.M. 1 COULD NOT HV1668'BE RECOVERED. DISK IS STAMPED DC VA BOUNDARY WITNESS 14 1947 HV1668'(NOT 46 AS PREVIOUS DESCRIPTION STATES) HV1668 HV1668 STATION RECOVERY (1974) HV1668 HV1668'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1974 (GWJ) HV1668'STATION RECOVERED AS DESCRIBED. REFERENCE MARKS NOT SEARCHED FOR. HV1668' HV1668'AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--ALEXANDRIA. HV1668 HV1668 STATION RECOVERY (1990) HV1668 HV1668'RECOVERY NOTE BY RINKER DETWILER AND ASSOCIATES 1990 HV1668'RECOVERED IN GOOD CONDITION. HV1668 HV1668 STATION RECOVERY (1996) HV1668 HV1668'RECOVERY NOTE BY US POWER SQUADRON 1996 HV1668'RECOVERED IN GOOD CONDITION.