DATASHEETS The NGS Data SheetSee file dsdata.txt for more information about the datasheet.DATABASE = Sybase ,PROGRAM = datasheet, VERSION = 7.32 1 National Geodetic Survey, Retrieval Date = MARCH 22, 2006 HV8181 *********************************************************************** HV8181 DESIGNATION - FLAGPOLE HV8181 PID - HV8181 HV8181 STATE/COUNTY- VA/CAROLINE HV8181 USGS QUAD - HV8181 HV8181 *CURRENT SURVEY CONTROL HV8181 ___________________________________________________________________ HV8181* NAD 83(1986)- 38 12 05. (N) 077 22 24. (W) SCALED HV8181* NAVD 88 - 67.542 (meters) 221.59 (feet) ADJUSTED HV8181 ___________________________________________________________________ HV8181 GEOID HEIGHT- -32.55 (meters) GEOID03 HV8181 DYNAMIC HT - 67.501 (meters) 221.46 (feet) COMP HV8181 MODELED GRAV- 980,023.3 (mgal) NAVD 88 HV8181 HV8181 VERT ORDER - FIRST CLASS I HV8181 HV8181.The horizontal coordinates were scaled from a topographic map and have HV8181.an estimated accuracy of +/- 6 seconds. HV8181 HV8181.The orthometric height was determined by differential leveling HV8181.and adjusted by the National Geodetic Survey in June 1991.. HV8181 HV8181.The geoid height was determined by GEOID03. HV8181 HV8181.The dynamic height is computed by dividing the NAVD 88 HV8181.geopotential number by the normal gravity value computed on the HV8181.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 HV8181.degrees latitude (g = 980.6199 gals.). HV8181 HV8181.The modeled gravity was interpolated from observed gravity values. HV8181 HV8181; North East Units Estimated Accuracy HV8181;SPC VA N - 2,059,960. 3,598,680. MT (+/- 180 meters Scaled) HV8181 HV8181 SUPERSEDED SURVEY CONTROL HV8181 HV8181 NGVD 29 (02/12/90) 67.790 (m) 222.41 (f) ADJUSTED 1 1 HV8181 HV8181.Superseded values are not recommended for survey control. HV8181.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. HV8181.See file dsdata.txt to determine how the superseded data were derived. HV8181 HV8181_U.S. NATIONAL GRID SPATIAL ADDRESS: 18STH921308(NAD 83) HV8181_MARKER: I = METAL ROD HV8181_SETTING: 59 = STAINLESS STEEL ROD IN SLEEVE (10 FT.+) HV8181_SP_SET: STAINLESS STEEL ROD IN SLEEVE HV8181_STAMPING: FLAGPOLE 1982 HV8181_MARK LOGO: NGS HV8181_PROJECTION: FLUSH HV8181_MAGNETIC: I = MARKER IS A STEEL ROD HV8181_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL HV8181_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR HV8181+SATELLITE: SATELLITE OBSERVATIONS - September 28, 2005 HV8181_ROD/PIPE-DEPTH: 5.49 meters HV8181_SLEEVE-DEPTH : 0.91 meters HV8181 HV8181 HISTORY - Date Condition Report By HV8181 HISTORY - 1982 MONUMENTED NGS HV8181 HISTORY - 19910819 GOOD NGS HV8181 HISTORY - 19920824 GOOD NGS HV8181 HISTORY - 19940815 GOOD NGS HV8181 HISTORY - 19990210 GOOD USPSQD HV8181 HISTORY - 20020116 GOOD USPSQD HV8181 HISTORY - 20050928 GOOD VADOT HV8181 HV8181 STATION DESCRIPTION HV8181 HV8181'DESCRIBED BY NATIONAL GEODETIC SURVEY 1982 HV8181'0.6 KM (0.35 MI) EAST ALOG COUNTY ROUTE 610 FROM THE JUNCTION WITH HV8181'STATE ROUTE 2, JUST SOUTH OF THE POST OFFICE IN CORBIN, TO A FORK, HV8181'THENCE0.6 KM (0.35 MI) EAST ALONG BURMA ROAD TO THE MARK ON THE HV8181'GROUNDS OF THE DEPARTMENT OF INTERIOR, FREDERICKSBURG GEOMAGNETIC HV8181'CENTER. 53.6 METERS NORTH FROM THE CENTER OF BURMA ROAD, 24.5 METERS HV8181'SOUTHWEST FROM A POWERLINE POLE, 1.11 METERS SOUTH FROM A STEEL FLAG HV8181'POLE. HV8181 HV8181 STATION RECOVERY (1991) HV8181 HV8181'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 HV8181'RECOVERED IN GOOD CONDITION. HV8181 HV8181 STATION RECOVERY (1992) HV8181 HV8181'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992 HV8181'MARK IS LOCATED AT THE U.S.G.S. FREDERICKSBURG GEOMAGNETIC CENTER, HV8181'LOCATED ABOUT 16.1 KM (10.0 MI) NORTH OF BOWLING GREEN, 14.0 KM (8.7 HV8181'MI) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 1.2 KM (0.7 MI) EAST OF HV8181'CORBIN. TO REACH FROM THE INTERSECTION OF U.S. HIGHWAY 17 SOUTH HV8181'BYPASS AND STATE HIGHWAY 2, LOCATED ABOUT 9.7 KM (6.0 MI) HV8181'SOUTH-SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON STATE HIGHWAY 2 HV8181'FOR 4.0 KM (2.5 MI) TO THE INTERSECTION OF COUNTY ROAD 610 (PEPMEIER HV8181'HILL ROAD) ON THE LEFT IN THE SMALL COMMUNITY OF CORBIN. TURN LEFT HV8181'AND GO EASTERLY ON COUNTY ROAD 610 FOR 0.7 KM (0.4 MI) TO A HV8181'Y-JUNCTION WHERE COUNTY ROAD 610 MAKES A SHARP TURN TO THE LEFT AND A HV8181'SECONDARY ROAD (BURMA ROAD) CONTINUES STRAIGHT AHEAD INTO THE GROUNDS HV8181'OF THE FREDERICKSBURG GEOMAGNETIC CENTER. CONTINUE EASTERLY ON BURMA HV8181'ROAD (U.S. PROPERTY) FOR 0.5 KM (0.3 MI) TO A CIRCLE DRIVEWAY ON THE HV8181'LEFT. TURN LEFT AND GO NORTH CURVING TO EAST ON THE DRIVEWAY FOR HV8181'APPROXIMATELY 135 M (442.9 FT) TO THE MARK ON THE RIGHT BY THE STEEL HV8181'FLAGPOLE. MARK IS A PUNCH MARK IN THE TOP OF A STAINLESS STEEL ROD HV8181'DRIVEN TO REFUSAL (DEPTH UNKNOWN), WITHIN A GREASE-FILLED SLEEVE. HV8181'THE MARK IS RECESSED 5 CM (2 IN) BELOW THE LOGO CAP, WHICH IS FLUSH HV8181'WITH GROUND SURFACE. THE MARK IS 53.8 M (176.5 FT) NORTH OF THE HV8181'CENTER OF BURMA ROAD, 31.0 M (101.7 FT) SOUTHWEST OF THE HV8181'SOUTHEASTERNMOST CORNER OF THE OFFICE/MACHINE SHOP FOR N.G.S. HV8181'INSTRUMENT AND EQUIPMENT SECTION, 26.8 M (87.9 FT) WEST OF A 41 CM HV8181'(16 IN) DIAMETER WHITE PINE, 26.1 M (85.6 FT) EAST OF A 43 CM (17 IN) HV8181'DIAMETER WHITE PINE AND 1.0 M (3.3 FT) SOUTH OF A STEEL FLAGPOLE. HV8181 HV8181 STATION RECOVERY (1994) HV8181 HV8181'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1994 (LBG) HV8181'MARK IS LOCATED AT THE U.S.G.S. FREDERICKSBURG GEOMAGNETIC CENTER, HV8181'LOCATED ABOUT 16.1 KM (10.00 MI) NORTH OF BOWLING GREEN, 14.0 KM (8.70 HV8181'MI) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 1.2 KM (0.75 MI) EAST OF HV8181'CORBIN. TO REACH FROM THE INTERSECTION OF U.S. HIGHWAY 17 SOUTH HV8181'BYPASS AND STATE HIGHWAY 2, LOCATED ABOUT 9.7 KM (6.00 MI) HV8181'SOUTH-SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON STATE HIGHWAY 2 FOR HV8181'4.0 KM (2.50 MI) TO THE INTERSECTION OF STATE ROAD 610 (PEPMEIER HILL HV8181'ROAD) ON THE LEFT IN THE SMALL COMMUNITY OF CORBIN. TURN LEFT AND GO HV8181'EASTERLY ON STATE ROAD 610 FOR 0.7 KM (0.45 MI) TO A Y-JUNCTION WHERE HV8181'STATE ROAD 610 MAKES A SHARP TURN TO THE LEFT AND A SECONDARY ROAD HV8181'(OBSERVATORY ROAD) CONTINUES STRAIGHT AHEAD INTO THE GROUNDS OF THE HV8181'FREDERICKSBURG GEOMAGNETIC CENTER. CONTINUE EASTERLY ON OBSERVATORY HV8181'ROAD (U.S. PROPERTY) FOR 0.5 KM (0.30 MI) TO A CIRCLE DRIVEWAY ON THE HV8181'LEFT. TURN LEFT AND GO NORTH CURVING TO EAST ON THE DRIVEWAY FOR HV8181'APPROXIMATELY 135 M (442.9 FT) TO THE MARK ON THE RIGHT BY THE STEEL HV8181'FLAGPOLE. MARK IS A PUNCH MARK IN THE TOP OF A STAINLESS STEEL ROD HV8181'DRIVEN TO REFUSAL (DEPTH UNKNOWN), WITHIN A GREASE-FILLED SLEEVE. THE HV8181'MARK IS RECESSED 5 CM (2 IN) BELOW THE LOGO CAP, WHICH IS FLUSH WITH HV8181'GROUND SURFACE. THE MARK IS 53.8 M (176.5 FT) NORTH OF THE CENTER OF HV8181'OBSERVATORY ROAD, 31.0 M (101.7 FT) SOUTHWEST OF THE SOUTHEASTERNMOST HV8181'CORNER OF THE OFFICE/MACHINE SHOP (BUILDING 1) FOR N.G.S. INSTRUMENT HV8181'AND EQUIPMENT SECTION, 26.8 M (87.9 FT) WEST OF A 41 CM (16 IN) HV8181'DIAMETER WHITE PINE, 26.1 M (85.6 FT) EAST OF A 43 CM (17 IN)DIAMETER HV8181'WHITE PINE AND 1.0 M (3.3 FT) SOUTH OF A STEEL FLAGPOLE. HV8181 HV8181 STATION RECOVERY (1999) HV8181 HV8181'RECOVERY NOTE BY US POWER SQUADRON 1999 HV8181'RECOVERED IN GOOD CONDITION. HV8181 HV8181 STATION RECOVERY (2002) HV8181 HV8181'RECOVERY NOTE BY US POWER SQUADRON 2002 (EEC) HV8181'RECOVERED IN GOOD CONDITION. HV8181 HV8181 STATION RECOVERY (2005) HV8181 HV8181'RECOVERY NOTE BY VIRGINIA DEPARTMENT OF TRANSPORTATION 2005 (JCA) HV8181'RECOVERED IN GOOD CONDITION. 1 National Geodetic Survey, Retrieval Date = MARCH 22, 2006 HV7839 *********************************************************************** HV7839 DESIGNATION - 7550002 HV7839 PID - HV7839 HV7839 STATE/COUNTY- VA/CAROLINE HV7839 USGS QUAD - HV7839 HV7839 *CURRENT SURVEY CONTROL HV7839 ___________________________________________________________________ HV7839* NAD 83(1986)- 38 12 04. (N) 077 22 24. (W) SCALED HV7839* NAVD 88 - 68.207 (meters) 223.78 (feet) ADJUSTED HV7839 ___________________________________________________________________ HV7839 GEOID HEIGHT- -32.55 (meters) GEOID03 HV7839 DYNAMIC HT - 68.166 (meters) 223.64 (feet) COMP HV7839 MODELED GRAV- 980,023.3 (mgal) NAVD 88 HV7839 HV7839 VERT ORDER - FIRST CLASS I HV7839 HV7839.The horizontal coordinates were scaled from a topographic map and have HV7839.an estimated accuracy of +/- 6 seconds. HV7839 HV7839.The orthometric height was determined by differential leveling HV7839.and adjusted by the National Geodetic Survey in June 1991.. HV7839 HV7839.The geoid height was determined by GEOID03. HV7839 HV7839.The dynamic height is computed by dividing the NAVD 88 HV7839.geopotential number by the normal gravity value computed on the HV7839.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 HV7839.degrees latitude (g = 980.6199 gals.). HV7839 HV7839.The modeled gravity was interpolated from observed gravity values. HV7839 HV7839; North East Units Estimated Accuracy HV7839;SPC VA N - 2,059,930. 3,598,680. MT (+/- 180 meters Scaled) HV7839 HV7839 SUPERSEDED SURVEY CONTROL HV7839 HV7839 NGVD 29 (02/12/90) 68.456 (m) 224.59 (f) ADJUSTED 1 1 HV7839 HV7839.Superseded values are not recommended for survey control. HV7839.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. HV7839.See file dsdata.txt to determine how the superseded data were derived. HV7839 HV7839_U.S. NATIONAL GRID SPATIAL ADDRESS: 18STH921307(NAD 83) HV7839_MARKER: DV = VERTICAL CONTROL DISK HV7839_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT HV7839_SP_SET: CONCRETE POST HV7839_STAMPING: 7550002 LEVEL TEST HV7839_MARK LOGO: NGS HV7839_PROJECTION: FLUSH HV7839_MAGNETIC: N = NO MAGNETIC MATERIAL HV7839_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO HV7839+STABILITY: SURFACE MOTION HV7839_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR HV7839+SATELLITE: SATELLITE OBSERVATIONS - January 16, 2002 HV7839 HV7839 HISTORY - Date Condition Report By HV7839 HISTORY - 1975 MONUMENTED NGS HV7839 HISTORY - 1975 GOOD NGS HV7839 HISTORY - 19831003 GOOD NGS HV7839 HISTORY - 19910819 GOOD NGS HV7839 HISTORY - 19920824 GOOD NGS HV7839 HISTORY - 19940815 GOOD NGS HV7839 HISTORY - 19990210 GOOD USPSQD HV7839 HISTORY - 20020116 GOOD USPSQD HV7839 HV7839 STATION DESCRIPTION HV7839 HV7839'DESCRIBED BY NATIONAL GEODETIC SURVEY 1975 HV7839'0.90 MI E FROM CORBIN. HV7839'0.40 MILES EAST ALONG STATE HIGHWAY 610 FROM THE POST OFFICE AT HV7839'CORBIN, THENCE 0.50 MILE EAST ALONG BURMA ROAD, LOCATED ON THE GROUNDS HV7839'OF THE DEPARTMENT OF INTERIOR FREDERICKSBURG GEOMAGNETIC CENTER, 78.6 HV7839'FEET SOUTHWEST OF BENCH MARK ASTRO WEST PIER WHICH IS DESCRIBED, 49.4 HV7839'FEET SOUTHEAST OF THE SOUTHEAST CORNER OF THE COSMICK RAY BUILDING, HV7839'18.5 FEET SOUTH OF THE CENTER OF A ROCK ROAD, ABOUT LEVEL WITH THE HV7839'ROCK ROAD AND SET IN THE TOP OF A CONCRETE POST FLUSH WITH THE GROUND. HV7839 HV7839 STATION RECOVERY (1983) HV7839 HV7839'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 HV7839'RECOVERED IN GOOD CONDITION. HV7839 HV7839 STATION RECOVERY (1991) HV7839 HV7839'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 HV7839'RECOVERED IN GOOD CONDITION. HV7839 HV7839 STATION RECOVERY (1992) HV7839 HV7839'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992 HV7839'MARK IS LOCATED AT THE U.S.G.S. FREDERICKSBURG GEOMAGNETIC CENTER, HV7839'LOCATED ABOUT 16.1 KM (10.0 MI) NORTH OF BOWLING GREEN, 14.0 KM (8.7 HV7839'MI) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 1.2 KM (0.7 MI) EAST OF HV7839'CORBIN. TO REACH FROM THE INTERSECTION OF U.S. HIGHWAY 17 SOUTH HV7839'BYPASS AND STATE HIGHWAY 2, LOCATED ABOUT 9.7 KM (6.0 MI) HV7839'SOUTH-SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON STATE HIGHWAY 2 HV7839'FOR 4.0 KM (2.5 MI) TO THE INTERSECTION OF COUNTY ROAD 610 (PEPMEIER HV7839'HILL ROAD) ON THE LEFT IN THE SMALL COMMUNITY OF CORBIN. TURN LEFT HV7839'AND GO EASTERLY ON COUNTY ROAD 610 FOR 0.7 KM (0.4 MI) TO A HV7839'Y-JUNCTION WHERE COUNTY ROAD 610 MAKES A SHARP TURN TO THE LEFT AND A HV7839'SECONDARY ROAD (BURMA ROAD) CONTINUES STRAIGHT AHEAD INTO THE GROUNDS HV7839'OF THE FREDERICKSBURG GEOMAGNETIC CENTER. CONTINUE EASTERLY ON BURMA HV7839'ROAD (U.S. PROPERTY) FOR 0.5 KM (0.3 MI) TO A CIRCLE DRIVEWAY ON THE HV7839'LEFT. TURN LEFT AND GO NORTH CURVING TO EAST ON THE DRIVEWAY FOR HV7839'APPROXIMATELY 190 M (623.4 FT) TO A GARAGE ON THE LEFT AND THE MARK HV7839'JUST AHEAD AND TO THE RIGHT, IN TOP OF A 28 CM (11 IN) DIAMETER HV7839'CONCRETE POST FLUSH WITH GROUND SURFACE, 66.8 M (219.2 FT) NORTH OF HV7839'THE CENTER OF BURMA ROAD, 25.3 M (83.0 FT) NORTHEAST OF THE CENTER OF HV7839'THE CIRCLE DRIVEWAY, 24.0 M (78.7 FT) SOUTHWEST OF STATION ASTRO WEST HV7839'PIER AND 15.1 M (49.5 FT) SOUTHEAST OF THE SOUTHEAST CORNER OF HV7839'BUILDING 11 (GPS BUILDING). HV7839 HV7839 STATION RECOVERY (1994) HV7839 HV7839'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1994 (LBG) HV7839'MARK IS LOCATED AT THE U.S.G.S. FREDERICKSBURG GEOMAGNETIC CENTER, HV7839'LOCATED ABOUT 16.1 KM (10.00 MI) NORTH OF BOWLING GREEN, 14.0 KM (8.70 HV7839'MI) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 1.2 KM (0.75 MI) EAST OF HV7839'CORBIN. TO REACH FROM THE INTERSECTION OF U.S. HIGHWAY 17 SOUTH HV7839'BYPASS AND STATE HIGHWAY 2, LOCATED ABOUT 9.7 KM (6.00 MI) HV7839'SOUTH-SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON STATE HIGHWAY 2 FOR HV7839'4.0 KM (2.50 MI) TO THE INTERSECTION OF STATE ROAD 610 (PEPMEIER HILL HV7839'ROAD) ON THE LEFT IN THE SMALL COMMUNITY OF CORBIN. TURN LEFT AND GO HV7839'EASTERLY ON STATE ROAD 610 FOR 0.7 KM (0.45 MI) TO A Y-JUNCTION WHERE HV7839'STATE ROAD 610 MAKES A SHARP TURN TO THE LEFT AND A SECONDARY ROAD HV7839'(OBSERVATORY ROAD) CONTINUES STRAIGHT AHEAD INTO THE GROUNDS OF THE HV7839'FREDERICKSBURG GEOMAGNETIC CENTER. CONTINUE EASTERLY ON OBSERVATORY HV7839'ROAD (U.S. PROPERTY) FOR 0.5 KM (0.30 MI) TO A CIRCLE DRIVEWAY ON THE HV7839'LEFT. TURN LEFT AND GO NORTH CURVING TO EAST ON THE DRIVEWAY FOR HV7839'APPROXIMATELY 190 M (623.4 FT) TO A GARAGE ON THE LEFT AND THE MARK HV7839'JUST AHEAD AND TO THE RIGHT, IN TOP OF A 28 CM (11 IN) DIAMETER HV7839'CONCRETE POST FLUSH WITH GROUND SURFACE, 66.8 M (219.2 FT) NORTH OF HV7839'THE CENTER OF OBSERVATORY ROAD, 25.3 M (83.0 FT) NORTHEAST OF THE HV7839'CENTER OF THE CIRCLE DRIVEWAY, 24.0 M (78.7 FT) SOUTHWEST OF STATION HV7839'ASTRO WEST PIER AND 15.1 M (49.5 FT) SOUTHEAST OF THE SOUTHEAST CORNER HV7839'OF BUILDING 11 (GPS BUILDING). HV7839 HV7839 STATION RECOVERY (1999) HV7839 HV7839'RECOVERY NOTE BY US POWER SQUADRON 1999 HV7839'RECOVERED IN GOOD CONDITION. HV7839 HV7839 STATION RECOVERY (2002) HV7839 HV7839'RECOVERY NOTE BY US POWER SQUADRON 2002 (EEC) HV7839'RECOVERED IN GOOD CONDITION. 1 National Geodetic Survey, Retrieval Date = MARCH 22, 2006 HV7843 *********************************************************************** HV7843 DESIGNATION - OBSERVATORY HV7843 PID - HV7843 HV7843 STATE/COUNTY- VA/CAROLINE HV7843 USGS QUAD - HV7843 HV7843 *CURRENT SURVEY CONTROL HV7843 ___________________________________________________________________ HV7843* NAD 83(1993)- 38 12 06.79868(N) 077 22 22.35067(W) ADJUSTED HV7843* NAVD 88 - 68.201 (meters) 223.76 (feet) ADJUSTED HV7843 ___________________________________________________________________ HV7843 LAPLACE CORR- -2.29 (seconds) DEFLEC99 HV7843 GEOID HEIGHT- -32.55 (meters) GEOID03 HV7843 DYNAMIC HT - 68.159 (meters) 223.62 (feet) COMP HV7843 MODELED GRAV- 980,023.3 (mgal) NAVD 88 HV7843 HV7843 HORZ ORDER - FIRST HV7843 VERT ORDER - FIRST CLASS I HV7843 HV7843.The horizontal coordinates were established by classical geodetic methods HV7843.and adjusted by the National Geodetic Survey in November 1994.. HV7843 HV7843.The orthometric height was determined by differential leveling HV7843.and adjusted by the National Geodetic Survey in June 1991.. HV7843 HV7843.The Laplace correction was computed from DEFLEC99 derived deflections. HV7843 HV7843.The geoid height was determined by GEOID03. HV7843 HV7843.The dynamic height is computed by dividing the NAVD 88 HV7843.geopotential number by the normal gravity value computed on the HV7843.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 HV7843.degrees latitude (g = 980.6199 gals.). HV7843 HV7843.The modeled gravity was interpolated from observed gravity values. HV7843 HV7843; North East Units Scale Factor Converg. HV7843;SPC VA N - 2,060,014.456 3,598,721.134 MT 0.99997453 +0 42 12.5 HV7843;SPC VA N - 6,758,564.09 11,806,804.25 sFT 0.99997453 +0 42 12.5 HV7843;UTM 18 - 4,230,876.979 292,226.231 MT 1.00013170 -1 28 04.8 HV7843 HV7843! - Elev Factor x Scale Factor = Combined Factor HV7843!SPC VA N - 0.99999441 x 0.99997453 = 0.99996894 HV7843!UTM 18 - 0.99999441 x 1.00013170 = 1.00012610 HV7843 HV7843: Primary Azimuth Mark Grid Az HV7843:SPC VA N - HILL AZ MK 292 38 51.2 HV7843:UTM 18 - HILL AZ MK 294 49 08.5 HV7843 HV7843|---------------------------------------------------------------------| HV7843| PID Reference Object Distance Geod. Az | HV7843| dddmmss.s | HV7843| HV7845 OBSERVATORY RM A 28.158 METERS 03254 | HV7843|---------------------------------------------------------------------| HV7843| DC6985 OBSERVATORY RM 2 25.899 METERS 06258 | HV7843|---------------------------------------------------------------------| HV7843| HV3122 TWIN OAK 479.530 METERS 0925624.4 | HV7843|---------------------------------------------------------------------| HV7843| HV3118 HILL AZ MK APPROX. 0.5 KM 2932103.7 | HV7843|---------------------------------------------------------------------| HV7843| HV7844 OBSERVATORY RM 1 24.680 METERS 35506 | HV7843|---------------------------------------------------------------------| HV7843 HV7843 SUPERSEDED SURVEY CONTROL HV7843 HV7843 NAD 83(1993)- 38 12 06.80060(N) 077 22 22.36460(W) AD( ) 1 HV7843 NAD 83(1986)- 38 12 06.79974(N) 077 22 22.36479(W) AD( ) 1 HV7843 NAD 27 - 38 12 06.33162(N) 077 22 23.42777(W) AD( ) 1 HV7843 NAVD 88 (09/21/92) 68.20 (m) 223.8 (f) LEVELING 3 HV7843 NGVD 29 (02/12/90) 68.449 (m) 224.57 (f) ADJUSTED 1 1 HV7843 HV7843.Superseded values are not recommended for survey control. HV7843.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. HV7843.See file dsdata.txt to determine how the superseded data were derived. HV7843 HV7843_U.S. NATIONAL GRID SPATIAL ADDRESS: 18STH9222630877(NAD 83) HV7843_MARKER: DS = TRIANGULATION STATION DISK HV7843_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT HV7843_SP_SET: CONCRETE POST HV7843_STAMPING: OBSERVATORY 1966 HV7843_MARK LOGO: CGS HV7843_MAGNETIC: N = NO MAGNETIC MATERIAL HV7843_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO HV7843+STABILITY: SURFACE MOTION HV7843_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR HV7843+SATELLITE: SATELLITE OBSERVATIONS - September 28, 2005 HV7843 HV7843 HISTORY - Date Condition Report By HV7843 HISTORY - 1966 MONUMENTED CGS HV7843 HISTORY - 1975 GOOD NGS HV7843 HISTORY - 19831003 GOOD NGS HV7843 HISTORY - 19920311 GOOD NGS HV7843 HISTORY - 19990210 GOOD USPSQD HV7843 HISTORY - 19991116 GOOD NGS HV7843 HISTORY - 20001013 GOOD NGS HV7843 HISTORY - 20020116 GOOD USPSQD HV7843 HISTORY - 20050928 GOOD VADOT HV7843 HV7843 STATION DESCRIPTION HV7843 HV7843'DESCRIBED BY COAST AND GEODETIC SURVEY 1966 (LGB) HV7843'THE STATION IS LOCATED 6-3/4 MILES SOUTHEAST OF FREDERICKSBURG, 1 HV7843'MILE EAST OF THE CORBIN POST OFFICE AND ON THE GROUND OF THE HV7843'FREDERICKSBURG MAGNETIC OBSERVATORY. HV7843' HV7843'TO REACH THE STATION FROM THE POST OFFICE IN FREDERICKSBURG, GO HV7843'EAST-SOUTHEAST ON U.S. HIGHWAY 17 AND STATE HIGHWAY 2 FOR 5.75 HV7843'MILES TO THEIR JUNCTION. BEAR RIGHT AND GO SOUTHERLY ON STATE HV7843'HIGHWAY 2 FOR 2.7 MILES TO THE JUNCTION OF COUNTY ROUTE 610 AND HV7843'THE CORBIN POST OFFICE ON THE LEFT. TURN LEFT AND GO EAST ON HV7843'COUNTY ROUTE 610 FOR 0.45 MILE TO A Y-FORK AND COUNTY ROUTE HV7843'612. BEAR RIGHT ON COUNTY ROUTE 612 FOR 0.3 MILE TO A HV7843'CROSSROAD AND COUNTY ROUTE 612 TURNS RIGHT. CONTINUE AHEAD HV7843'EAST ON BURMA ROAD FOR 0.15 MILE TO A DIM SIDE ROAD ON THE HV7843'LEFT. TURN LEFT AND GO 0.05 MILE TO THE STATION. HV7843' HV7843'THE STATION MARK IS A STANDARD DISK, STAMPED OBSERVATORY 1966, HV7843'SET IN THE TOP OF A 12-INCH ROUND CONCRETE MONUMENT THAT IS FLUSH HV7843'WITH THE GROUND SURFACE. IT IS 236 FEET EAST-NORTHEAST OF THE HV7843'SOUTHEAST CORNER OF A SMALL WHITE BUILDING, 175 FEET NORTH OF A HV7843'TELEPHONE LINE POLE, 113 FEET SOUTHEAST OF THE CENTER OF A HV7843'GRAVELED ROAD, 93 FEET WEST OF THE CENTER OF A DIM TRACK ROAD. HV7843' HV7843'REFERENCE MARK 1 IS A STANDARD DISK, STAMPED OBSERVATORY NO 1 HV7843'1966, SET IN THE TOP OF A 12-INCH ROUND CONCRETE MONUMENT THAT IS HV7843'FLUSH WITH THE GROUND SURFACE. IT IS 255 FEET NORTH OF A TELEPHONE HV7843'LINE POLE, 231 FEET EAST-NORTHEAST OF THE SOUTHEAST CORNER OF A HV7843'SMALL WHITE BUILDING, 96 FEET WEST OF THE CENTER OF A DIM TRACK HV7843'ROAD AND 57 FEET SOUTHEAST OF THE CENTER OF A GRAVELED ROAD. HV7843' HV7843'REFERENCE MARK 2 IS A STANDARD DISK, STAMPED OBSERVATORY NO 2 HV7843'1966, SET IN THE TOP OF A 12-INCH ROUND CONCRETE MONUMENT THAT IS HV7843'FLUSH WITH THE GROUND SURFACE. IT IS 309 FEET EAST OF THE HV7843'SOUTHEAST CORNER OF THE SMALL WHITE BUILDING, 152 FEET SOUTHEAST OF HV7843'THE CENTER OF THE GRAVELED ROAD AND 16 FEET WEST OF THE HV7843'CENTER OF THE TRACK ROAD. HV7843' HV7843'TRIANGULATION STATIONS HILL AZIMUTH MARK 1949 AND TWIN OAK 1949 HV7843'MAY BE USED AS AZIMUTH MARKS FOR THIS STATION, SEE DESCRIPTIONS HV7843'THEREOF. HV7843 HV7843 STATION RECOVERY (1975) HV7843 HV7843'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1975 HV7843'1.0 MI E FROM CORBIN. HV7843'0.40 MILES EAST ALONG STATE HIGHWAY 610 FROM THE POST OFFICE AT HV7843'CORBIN, THENCE 0.60 MILE EAST ALONG BURMA ROAD, LOCATED ON THE GROUNDS HV7843'OF THE DEPARTMENT OF INTERIOR FREDERICKSBURG GEOMAGNETIC CENTER, ABOUT HV7843'0.10 MILE EAST OF A 5-BAY GARAGE, 236 FEET EAST-NORTHEAST OF THE HV7843'SOUTHEAST CORNER OF A SMALL WHITE BUILDING, 175 FEET NORTH OF A HV7843'TELEPHONE LINE POLE, 113 FEET SOUTHEAST OF THE CENTER OF A ROCK ROAD, HV7843'93 FEET WEST OF THE CENTER OF A DIM TRACK ROAD, 80.9 FEET SOUTH OF HV7843'REFERENCE MARK NO. 1, ABOUT LEVEL WITH THE ROCK ROAD AND SET IN THE HV7843'TOP OF A CONCRETE POST FLUSH WITH THE GROUND. HV7843 HV7843 STATION RECOVERY (1983) HV7843 HV7843'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 HV7843'RECOVERED IN GOOD CONDITION. HV7843 HV7843 STATION RECOVERY (1992) HV7843 HV7843'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992 HV7843'THE STATION IS LOCATED ON U. S. GOVERNMENT PROPERTY AT THE HV7843'FREDERICKSBURG GEOMAGNETIC CENTER IN CORBIN, CAROLINE COUNTY, HV7843'VIRGINIA, APPROXIMATELY 9 MI (14.5 KM) SOUTH-SOUTHEAST OF HV7843'FREDERICKSBURG AND 10 MI (16.1 KM) NORTH OF BOWLING GREEN. HV7843'TO INQUIRE ABOUT ACCESS TO THE STATION CALL THE CHIEF OF THE HV7843'INSTRUMENT AND DEVELOPMENT SECTION OF THE NATIONAL GEODETIC SURVEY AT HV7843'703-373-7605 OR 373-1243. HV7843'TO REACH THE STATION FROM THE JUNCTION OF US HWY 17 AND STATE HWY 2 HV7843'SOUTH OF FREDERICKSBURG GO SOUTH ON STATE HWY 2 FOR 2.4 MI (3.9 KM) HV7843'TO THE JUNCTION OF STATE ROAD 610 AT CORBIN. GO EAST ON 610 FOR 0.4 MI HV7843'(0.6 KM) WHERE THE ROAD VEERS LEFT AND THE SIGN POINTS STRAIGHT AHEAD HV7843'FOR THE FREDERICKSBURG GEOMAGNETIC CENTER. REPORT TO THE OFFICE HV7843'BEFORE PROCEEDING TO THE STATION. FOLLOW THE SIGN EAST ON BURMA ROAD HV7843'FOR 0.6 MI (1.0 KM) TO THE MARK ON THE LEFT IN A GRASS FIELD EAST OF HV7843'THE OFFICE BUILDING. HV7843'212 FT (64.6 M) NORTH OF C/L OF BURMA ROAD HV7843'164.4 FT (50.1 M) SOUTHEAST OF 5 FOOT (1.5 M) HIGH STANDPIPE KNOWN AS HV7843'ASTRO EAST PIER HV7843'111 FT (33.8 M) SOUTHEAST OF C/L OF A GRAVEL DRIVE HV7843 HV7843 STATION RECOVERY (1999) HV7843 HV7843'RECOVERY NOTE BY US POWER SQUADRON 1999 HV7843'RECOVERED IN GOOD CONDITION. HV7843 HV7843 STATION RECOVERY (1999) HV7843 HV7843'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1999 (BB) HV7843'GOOD. HV7843 HV7843 STATION RECOVERY (2000) HV7843 HV7843'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 2000 (WJR) HV7843'THE 1992 RECOVERY IS GOOD. THE CONTACT IS NOW INSTRUMENT AND HV7843'METHODOLOGIES BRANCH TELEPHONE 540-373-7605. BURMA ROAD IS NOW HV7843'OBSERVATORY ROAD. HV7843 HV7843 STATION RECOVERY (2002) HV7843 HV7843'RECOVERY NOTE BY US POWER SQUADRON 2002 (EEC) HV7843'RECOVERED IN GOOD CONDITION. HV7843 HV7843 STATION RECOVERY (2005) HV7843 HV7843'RECOVERY NOTE BY VIRGINIA DEPARTMENT OF TRANSPORTATION 2005 (JCA) HV7843'RECOVERED IN GOOD CONDITION. 1 National Geodetic Survey, Retrieval Date = MARCH 22, 2006 HV3122 *********************************************************************** HV3122 DESIGNATION - TWIN OAK HV3122 PID - HV3122 HV3122 STATE/COUNTY- VA/CAROLINE HV3122 USGS QUAD - HV3122 HV3122 *CURRENT SURVEY CONTROL HV3122 ___________________________________________________________________ HV3122* NAD 83(1993)- 38 12 06.00051(N) 077 22 02.66798(W) ADJUSTED HV3122* NAVD 88 - 65.676 (meters) 215.47 (feet) ADJUSTED HV3122 ___________________________________________________________________ HV3122 LAPLACE CORR- -2.44 (seconds) DEFLEC99 HV3122 GEOID HEIGHT- -32.55 (meters) GEOID03 HV3122 DYNAMIC HT - 65.637 (meters) 215.34 (feet) COMP HV3122 MODELED GRAV- 980,023.7 (mgal) NAVD 88 HV3122 HV3122 HORZ ORDER - FIRST HV3122 VERT ORDER - FIRST CLASS I HV3122 HV3122.The horizontal coordinates were established by classical geodetic methods HV3122.and adjusted by the National Geodetic Survey in November 1994.. HV3122 HV3122.The orthometric height was determined by differential leveling HV3122.and adjusted by the National Geodetic Survey in June 1991.. HV3122 HV3122.The Laplace correction was computed from DEFLEC99 derived deflections. HV3122 HV3122.The geoid height was determined by GEOID03. HV3122 HV3122.The dynamic height is computed by dividing the NAVD 88 HV3122.geopotential number by the normal gravity value computed on the HV3122.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 HV3122.degrees latitude (g = 980.6199 gals.). HV3122 HV3122.The modeled gravity was interpolated from observed gravity values. HV3122 HV3122; North East Units Scale Factor Converg. HV3122;SPC VA N - 2,059,995.741 3,599,200.286 MT 0.99997456 +0 42 24.7 HV3122;SPC VA N - 6,758,502.69 11,808,376.27 sFT 0.99997456 +0 42 24.7 HV3122;UTM 18 - 4,230,840.117 292,704.405 MT 1.00012925 -1 27 52.6 HV3122 HV3122! - Elev Factor x Scale Factor = Combined Factor HV3122!SPC VA N - 0.99999480 x 0.99997456 = 0.99996936 HV3122!UTM 18 - 0.99999480 x 1.00012925 = 1.00012405 HV3122 HV3122: Primary Azimuth Mark Grid Az HV3122:SPC VA N - OBSERVATORY 272 14 11.9 HV3122:UTM 18 - OBSERVATORY 274 24 29.2 HV3122 HV3122|---------------------------------------------------------------------| HV3122| PID Reference Object Distance Geod. Az | HV3122| dddmmss.s | HV3122| HV5420 TT NO 17 60.697 METERS 00038 | HV3122|---------------------------------------------------------------------| HV3122| HV3125 TWIN OAK RM 2 15.298 METERS 01832 | HV3122|---------------------------------------------------------------------| HV3122| HV7843 OBSERVATORY 479.530 METERS 2725636.6 | HV3122|---------------------------------------------------------------------| HV3122| HV7845 OBSERVATORY RM A 466.104 METERS 2755636.7 | HV3122|---------------------------------------------------------------------| HV3122| HV3123 TWIN OAK RM 1 13.427 METERS 30121 | HV3122|---------------------------------------------------------------------| HV3122 HV3122 SUPERSEDED SURVEY CONTROL HV3122 HV3122 NAD 83(1993)- 38 12 06.00242(N) 077 22 02.68189(W) AD( ) 1 HV3122 NAD 83(1986)- 38 12 06.00164(N) 077 22 02.68220(W) AD( ) 1 HV3122 NAD 27 - 38 12 05.53400(N) 077 22 03.74200(W) AD( ) 1 HV3122 NAVD 88 (09/21/92) 65.68 (m) 215.5 (f) LEVELING 3 HV3122 NGVD 29 (02/12/90) 65.925 (m) 216.29 (f) ADJUSTED 1 1 HV3122 HV3122.Superseded values are not recommended for survey control. HV3122.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. HV3122.See file dsdata.txt to determine how the superseded data were derived. HV3122 HV3122_U.S. NATIONAL GRID SPATIAL ADDRESS: 18STH9270430840(NAD 83) HV3122_MARKER: DS = TRIANGULATION STATION DISK HV3122_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT HV3122_SP_SET: CONCRETE POST HV3122_STAMPING: TWIN OAK 1949 HV3122_MARK LOGO: CGS HV3122_MAGNETIC: N = NO MAGNETIC MATERIAL HV3122_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO HV3122+STABILITY: SURFACE MOTION HV3122_SATELLITE: THE SITE LOCATION WAS REPORTED AS NOT SUITABLE FOR HV3122+SATELLITE: SATELLITE OBSERVATIONS - January 16, 2002 HV3122 HV3122 HISTORY - Date Condition Report By HV3122 HISTORY - 1949 MONUMENTED CGS HV3122 HISTORY - 1949 GOOD CGS HV3122 HISTORY - 1966 GOOD CGS HV3122 HISTORY - 19831003 GOOD NGS HV3122 HISTORY - 19920311 GOOD NGS HV3122 HISTORY - 19990210 GOOD USPSQD HV3122 HISTORY - 20001013 GOOD NGS HV3122 HISTORY - 20020116 GOOD USPSQD HV3122 HV3122 STATION DESCRIPTION HV3122 HV3122'DESCRIBED BY COAST AND GEODETIC SURVEY 1949 (ERM) HV3122'LOCATED APPROXIMATELY 1.2 MILES E OF THE CORBIN POST OFFICE, HV3122'15.6 METERS N OF THE CENTER LINE OF A GRAVEL ROAD KNOWN AS HV3122'THE BURMA ROAD, IN THE SW CORNER OF THE FIRST SCOPE OF OAK HV3122'AND PINE TREES GROWING ON THE N SIDE OF THE ROAD, 5 METERS HV3122'SSE OF A 12-INCH TWIN OAK TREE. HV3122' HV3122'STATION MARK IS A BRONZE STATION DISK, STAMPED TWIN OAK 1949, HV3122'AND SET IN CONCRETE. HV3122' HV3122'REFERENCE MARK 1 IS A BRONZE REFERENCE DISK SET IN CONCRETE. HV3122'IT IS NW OF THE STATION, 18.5 METERS N OF THE CENTER LINE OF HV3122'THE BURMA ROAD. HV3122' HV3122'REFERENCE MARK 2 IS A BRONZE REFERENCE DISK SET IN CONCRETE. HV3122'IT IS NNE OF THE STATION, 31 METERS N OF THE CENTER LINE OF THE HV3122'BURMA ROAD. HV3122 HV3122 STATION RECOVERY (1949) HV3122 HV3122'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1949 HV3122'1.2 MI E FROM CORBIN. HV3122'1.2 MILES EAST OF THE POST OFFICE AT CORBIN, ON A GRAVEL ROAD HV3122'KNOWN AS THE BURMA ROAD, IN THE SOUTHWEST CORNER OF AN AREA OF HV3122'OAK AND PINE WOODS, 51.2 FEET NORTH OF THE CENTER LINE OF THE HV3122'BURMA ROAD, AND 16.4 FEET SOUTH-SOUTHEAST OF A 12-INCH TWIN OAK HV3122'TREE. SET IN THE TOP OF A CONCRETE POST. HV3122 HV3122 STATION RECOVERY (1966) HV3122 HV3122'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1966 (LGB) HV3122'THE STATION, REFERENCE MARK 1 AND REFERENCE MARK 2 WERE FOUND IN HV3122'GOOD CONDITION. NO PREVIOUS DESCRIPTION WAS AVAILABLE. A COMPLETE HV3122'NEW DESCRIPTION FOLLOWS. HV3122' HV3122'THE STATION IS ABOUT 10-1/2 MILES NORTH OF BOWLING GREEN, 8-1/2 HV3122'MILES SOUTHEAST OF FREDERICKSBURG, 3-1/2 MILES SOUTHEAST OF NEW HV3122'POST, AND 1-1/2 MILES EAST OF CORBIN. IT IS ON THE GROUNDS OF THE HV3122'FREDERICKSBURG MAGNETIC OBSERVATORY AND 0.25 MILE EAST OF HV3122'TRIANGULATION STATION OBSERVATORY. HV3122' HV3122'TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 17 AND STATE HV3122'HIGHWAY 2, 6 MILES SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON HV3122'STATE HIGHWAY 2 FOR 2.65 MILES TO COUNTY ROUTE 610 ON THE LEFT, AT HV3122'THE CORBIN POST OFFICE. TURN LEFT AND GO EAST ON COUNTY ROUTE 610 HV3122'FOR 0.4 MILE TO COUNTY ROUTE 612. BEAR RIGHT ON COUNTY ROUTE 612 HV3122'AND CONTINUE EAST FOR 0.3 MILE TO A CROSSROAD AND COUNTY ROUTE 612 HV3122'TURNS TO THE RIGHT. KEEP STRAIGHT AHEAD AND CONTINUE EAST ON BURMA HV3122'ROAD FOR 0.2 MILE TO A TRACK ROAD ON THE LEFT AND TRIANGULATION HV3122'STATION OBSERVATORY ABOUT 100 FEET TO THE NORTH. CONTINUE EAST HV3122'ON BURMA ROAD FOR 0.25 MILE TO THE STATION ON THE LEFT. HV3122' HV3122'THE STATION IS A STANDARD TRIANGULATION STATION DISK STAMPED TWIN HV3122'OAK 1949, SET IN THE TOP OF A 12-INCH SQUARE CONCRETE MONUMENT AND HV3122'PROJECTS 5 INCHES ABOVE THE GROUND. IT IS 52 FEET NORTH OF THE HV3122'CENTER OF BURMA ROAD, 15.8 FEET SOUTHEAST OF THE TRUNK OF TWIN OAK HV3122'TREES 24 INCHES IN DIAMETER, AND 18.8 FEET NORTH OF A PINE TREE HV3122'24 INCHES IN DIAMETER. HV3122' HV3122'REFERENCE MARK 1 IS A STANDARD REFERENCE MARK DISK STAMPED TWIN OAK HV3122'RM 1 1949, SET IN THE TOP OF A 12-INCH SQUARE CONCRETE MONUMENT HV3122'AND PROJECTING 5 INCHES ABOVE THE GROUND. IT IS 61 FEET NORTH OF HV3122'THE CENTER OF BURMA ROAD AND 28 FEET WEST-NORTHWEST OF THE TRUND OF HV3122'THE TWIN OAK TREES. HV3122' HV3122'REFERENCE MARK 2 IS A STANDARD REFERENCE MARK DISK STAMPED TWIN HV3122'OAK RM 2 1949, SET IN THE TOP OF A 12-INCH SQUARE CONCRETE MONUMENT HV3122'AND PROJECTING 5 INCHES ABOVE THE GROUND. IT IS 41 FEET NORTHEAST HV3122'OF THE TRUNK OF THE TWIN OAK TREES AND 16 FEET EAST OF A DIM TRACK HV3122'ROAD. HV3122 HV3122 STATION RECOVERY (1983) HV3122 HV3122'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 HV3122'RECOVERED IN GOOD CONDITION. HV3122 HV3122 STATION RECOVERY (1992) HV3122 HV3122'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992 HV3122'THE STATION IS LOCATED ON U. S. GOVERNMENT PROPERTY AT THE HV3122'FREDERICKSBURG GEOMAGNETIC CENTER IN CORBIN, CAROLINE COUNTY, HV3122'VIRGINIA, APPROXIMATELY 9 MI (14.5 KM) SOUTH-SOUTHEAST OF HV3122'FREDERICKSBURG AND 10 MI (16.1 KM) NORTH OF BOWLING GREEN. HV3122'TO INQUIRE ABOUT ACCESS TO THE STATION CALL THE CHIEF OF THE HV3122'INSTRUMENT AND DEVELOPMENT SECTION OF THE NATIONAL GEODETIC SURVEY AT HV3122'703-373-7605 OR 373-1243. HV3122'TO REACH THE STATION FROM THE JUNCTION OF US HWY 17 AND STATE HWY 2 HV3122'SOUTH OF FREDERICKSBURG GO SOUTH ON STATE HWY 2 FOR 2.4 MI (3.9 KM) HV3122'TO THE JUNCTION OF STATE ROAD 610 AT CORBIN. GO EAST ON 610 FOR 0.4 MI HV3122'(0.6 KM) WHERE THE ROAD VEERS LEFT AND THE SIGN POINTS STRAIGHT AHEAD HV3122'FOR THE FREDERICKSBURG GEOMAGNETIC CENTER. REPORT TO THE OFFICE HV3122'BEFORE PROCEEDING TO THE STATION. FOLLOW THE SIGN EAST ON BURMA ROAD HV3122'FOR 1.0 MI (1.6 KM) TO A LOCKED GATE AND THE MARK ON THE LEFT. HV3122'A 4 FOOT (1.2 M) HIGH ALUMINUM STAND IS SET PERMANENTLY OVER THE MARK. HV3122'10.5 FT (3.2 M) NORTH OF A 24-INCH DIAMETER PINE TREE HV3122'15 FT (4.6 M) SOUTHEAST OF A LARGE TWIN TRUNK OAK TREE HV3122'54 FT (16.5 M) NORTH OF C/L OF BURMA ROAD HV3122'107 FT (32.6 M) NORTHWEST OF THE NORTH GATE POST HV3122 HV3122 STATION RECOVERY (1999) HV3122 HV3122'RECOVERY NOTE BY US POWER SQUADRON 1999 HV3122'RECOVERED IN GOOD CONDITION. HV3122 HV3122 STATION RECOVERY (2000) HV3122 HV3122'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 2000 (WJR) HV3122'THE 1992 RECOVERY IS GOOD. THE CONTACT IS NOW INSTRUMENT AND HV3122'METHODOLOGIES BRANCH TELEPHONE 540-373-7605. BURMA ROAD IS NOW HV3122'OBSERVATORY ROAD. HV3122 HV3122 STATION RECOVERY (2002) HV3122 HV3122'RECOVERY NOTE BY US POWER SQUADRON 2002 (EEC) HV3122'RECOVERED IN GOOD CONDITION. *** retrieval complete. Elapsed Time = 00:00:01