DN02.01.02WDESC 06.00.1820060825L 12345 0001VAANGS NATIONAL GEODETIC SURVEY N381207 N381204 W0772225 W0772202 ACORBIN, VIRGINIA LEVEL TIES, 2006 BVERIFICATION OF STATION OBSERVATORY PID HV7843 @1000HV8181GFLAGPOLE FLAGPOLE 1982 YUSVA033CAROLINE RI 59 BIF ANGS NATIONAL GEODETIC SURVEY ANGS NATIONAL GEODETIC SURVEY CLS20060322P0000NNN0002K1982 MANGS NATIONAL GEODETIC SURVEY DESCRIBED BY NATIONAL GEODETIC SURVEY 1982 0.6 KM (0.35 MI) EAST ALOG COUNTY ROUTE 610 FROM THE JUNCTION WITH STATE ROUTE 2, JUST SOUTH OF THE POST OFFICE IN CORBIN, TO A FORK, THENCE0.6 KM (0.35 MI) EAST ALONG BURMA ROAD TO THE MARK ON THE GROUNDS OF THE DEPARTMENT OF INTERIOR, FREDERICKSBURG GEOMAGNETIC CENTER. 53.6 METERS NORTH FROM THE CENTER OF BURMA ROAD, 24.5 METERS SOUTHWEST FROM A POWERLINE POLE, 1.11 METERS SOUTH FROM A STEEL FLAG POLE. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992 MARK IS LOCATED AT THE U.S.G.S. FREDERICKSBURG GEOMAGNETIC CENTER, LOCATED ABOUT 16.1 KM (10.0 MI) NORTH OF BOWLING GREEN, 14.0 KM (8.7 MI) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 1.2 KM (0.7 MI) EAST OF CORBIN. TO REACH FROM THE INTERSECTION OF U.S. HIGHWAY 17 SOUTH BYPASS AND STATE HIGHWAY 2, LOCATED ABOUT 9.7 KM (6.0 MI) SOUTH-SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON STATE HIGHWAY 2 FOR 4.0 KM (2.5 MI) TO THE INTERSECTION OF COUNTY ROAD 610 (PEPMEIER HILL ROAD) ON THE LEFT IN THE SMALL COMMUNITY OF CORBIN. TURN LEFT AND GO EASTERLY ON COUNTY ROAD 610 FOR 0.7 KM (0.4 MI) TO A Y-JUNCTION WHERE COUNTY ROAD 610 MAKES A SHARP TURN TO THE LEFT AND A SECONDARY ROAD (BURMA ROAD) CONTINUES STRAIGHT AHEAD INTO THE GROUNDS OF THE FREDERICKSBURG GEOMAGNETIC CENTER. CONTINUE EASTERLY ON BURMA ROAD (U.S. PROPERTY) FOR 0.5 KM (0.3 MI) TO A CIRCLE DRIVEWAY ON THE LEFT. TURN LEFT AND GO NORTH CURVING TO EAST ON THE DRIVEWAY FOR APPROXIMATELY 135 M (442.9 FT) TO THE MARK ON THE RIGHT BY THE STEEL FLAGPOLE. MARK IS A PUNCH MARK IN THE TOP OF A STAINLESS STEEL ROD DRIVEN TO REFUSAL (DEPTH UNKNOWN), WITHIN A GREASE-FILLED SLEEVE. THE MARK IS RECESSED 5 CM (2 IN) BELOW THE LOGO CAP, WHICH IS FLUSH WITH GROUND SURFACE. THE MARK IS 53.8 M (176.5 FT) NORTH OF THE CENTER OF BURMA ROAD, 31.0 M (101.7 FT) SOUTHWEST OF THE SOUTHEASTERNMOST CORNER OF THE OFFICE/MACHINE SHOP FOR N.G.S. INSTRUMENT AND EQUIPMENT SECTION, 26.8 M (87.9 FT) WEST OF A 41 CM (16 IN) DIAMETER WHITE PINE, 26.1 M (85.6 FT) EAST OF A 43 CM (17 IN) DIAMETER WHITE PINE AND 1.0 M (3.3 FT) SOUTH OF A STEEL FLAGPOLE. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1994 (LBG) MARK IS LOCATED AT THE U.S.G.S. FREDERICKSBURG GEOMAGNETIC CENTER, LOCATED ABOUT 16.1 KM (10.00 MI) NORTH OF BOWLING GREEN, 14.0 KM (8.70 MI) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 1.2 KM (0.75 MI) EAST OF CORBIN. TO REACH FROM THE INTERSECTION OF U.S. HIGHWAY 17 SOUTH BYPASS AND STATE HIGHWAY 2, LOCATED ABOUT 9.7 KM (6.00 MI) SOUTH-SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON STATE HIGHWAY 2 FOR 4.0 KM (2.50 MI) TO THE INTERSECTION OF STATE ROAD 610 (PEPMEIER HILL ROAD) ON THE LEFT IN THE SMALL COMMUNITY OF CORBIN. TURN LEFT AND GO EASTERLY ON STATE ROAD 610 FOR 0.7 KM (0.45 MI) TO A Y-JUNCTION WHERE STATE ROAD 610 MAKES A SHARP TURN TO THE LEFT AND A SECONDARY ROAD (OBSERVATORY ROAD) CONTINUES STRAIGHT AHEAD INTO THE GROUNDS OF THE FREDERICKSBURG GEOMAGNETIC CENTER. CONTINUE EASTERLY ON OBSERVATORY ROAD (U.S. PROPERTY) FOR 0.5 KM (0.30 MI) TO A CIRCLE DRIVEWAY ON THE LEFT. TURN LEFT AND GO NORTH CURVING TO EAST ON THE DRIVEWAY FOR APPROXIMATELY 135 M (442.9 FT) TO THE MARK ON THE RIGHT BY THE STEEL FLAGPOLE. MARK IS A PUNCH MARK IN THE TOP OF A STAINLESS STEEL ROD DRIVEN TO REFUSAL (DEPTH UNKNOWN), WITHIN A GREASE-FILLED SLEEVE. THE MARK IS RECESSED 5 CM (2 IN) BELOW THE LOGO CAP, WHICH IS FLUSH WITH GROUND SURFACE. THE MARK IS 53.8 M (176.5 FT) NORTH OF THE CENTER OF OBSERVATORY ROAD, 31.0 M (101.7 FT) SOUTHWEST OF THE SOUTHEASTERNMOST CORNER OF THE OFFICE/MACHINE SHOP (BUILDING 1) FOR N.G.S. INSTRUMENT AND EQUIPMENT SECTION, 26.8 M (87.9 FT) WEST OF A 41 CM (16 IN) DIAMETER WHITE PINE, 26.1 M (85.6 FT) EAST OF A 43 CM (17 IN)DIAMETER WHITE PINE AND 1.0 M (3.3 FT) SOUTH OF A STEEL FLAGPOLE. RECOVERY NOTE BY US POWER SQUADRON 1999 RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY US POWER SQUADRON 2002 (EEC) RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY VIRGINIA DEPARTMENT OF TRANSPORTATION 2005 (JCA) RECOVERED IN GOOD CONDITION.K19910819GANGS NATIONAL GEODETIC SURVEY K19920824GANGS NATIONAL GEODETIC SURVEY K19940815GANGS NATIONAL GEODETIC SURVEY LBG K19990210GKUSPSQDUS POWER SQUADRON K20020116GKUSPSQDUS POWER SQUADRON EEC K20050928GCVADOT VIRGINIA DEPARTMENT OF TRANSPORTATION JCA LN381205. W0772224. S83 M67.542 A88 1991060111N @1001HV7839G7550002 7550002 LEVEL TEST YUSVA033CAROLINE DDV07 CNF ANGS NATIONAL GEODETIC SURVEY ANGS NATIONAL GEODETIC SURVEY CLS20060322P0000NNN0001K1975 MANGS NATIONAL GEODETIC SURVEY DESCRIBED BY NATIONAL GEODETIC SURVEY 1975 0.90 MI E FROM CORBIN. 0.40 MILES EAST ALONG STATE HIGHWAY 610 FROM THE POST OFFICE AT CORBIN, THENCE 0.50 MILE EAST ALONG BURMA ROAD, LOCATED ON THE GROUNDS OF THE DEPARTMENT OF INTERIOR FREDERICKSBURG GEOMAGNETIC CENTER, 78.6 FEET SOUTHWEST OF BENCH MARK ASTRO WEST PIER WHICH IS DESCRIBED, 49.4 FEET SOUTHEAST OF THE SOUTHEAST CORNER OF THE COSMICK RAY BUILDING, 18.5 FEET SOUTH OF THE CENTER OF A ROCK ROAD, ABOUT LEVEL WITH THE ROCK ROAD AND SET IN THE TOP OF A CONCRETE POST FLUSH WITH THE GROUND. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992 MARK IS LOCATED AT THE U.S.G.S. FREDERICKSBURG GEOMAGNETIC CENTER, LOCATED ABOUT 16.1 KM (10.0 MI) NORTH OF BOWLING GREEN, 14.0 KM (8.7 MI) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 1.2 KM (0.7 MI) EAST OF CORBIN. TO REACH FROM THE INTERSECTION OF U.S. HIGHWAY 17 SOUTH BYPASS AND STATE HIGHWAY 2, LOCATED ABOUT 9.7 KM (6.0 MI) SOUTH-SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON STATE HIGHWAY 2 FOR 4.0 KM (2.5 MI) TO THE INTERSECTION OF COUNTY ROAD 610 (PEPMEIER HILL ROAD) ON THE LEFT IN THE SMALL COMMUNITY OF CORBIN. TURN LEFT AND GO EASTERLY ON COUNTY ROAD 610 FOR 0.7 KM (0.4 MI) TO A Y-JUNCTION WHERE COUNTY ROAD 610 MAKES A SHARP TURN TO THE LEFT AND A SECONDARY ROAD (BURMA ROAD) CONTINUES STRAIGHT AHEAD INTO THE GROUNDS OF THE FREDERICKSBURG GEOMAGNETIC CENTER. CONTINUE EASTERLY ON BURMA ROAD (U.S. PROPERTY) FOR 0.5 KM (0.3 MI) TO A CIRCLE DRIVEWAY ON THE LEFT. TURN LEFT AND GO NORTH CURVING TO EAST ON THE DRIVEWAY FOR APPROXIMATELY 190 M (623.4 FT) TO A GARAGE ON THE LEFT AND THE MARK JUST AHEAD AND TO THE RIGHT, IN TOP OF A 28 CM (11 IN) DIAMETER CONCRETE POST FLUSH WITH GROUND SURFACE, 66.8 M (219.2 FT) NORTH OF THE CENTER OF BURMA ROAD, 25.3 M (83.0 FT) NORTHEAST OF THE CENTER OF THE CIRCLE DRIVEWAY, 24.0 M (78.7 FT) SOUTHWEST OF STATION ASTRO WEST PIER AND 15.1 M (49.5 FT) SOUTHEAST OF THE SOUTHEAST CORNER OF BUILDING 11 (GPS BUILDING). RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1994 (LBG) MARK IS LOCATED AT THE U.S.G.S. FREDERICKSBURG GEOMAGNETIC CENTER, LOCATED ABOUT 16.1 KM (10.00 MI) NORTH OF BOWLING GREEN, 14.0 KM (8.70 MI) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 1.2 KM (0.75 MI) EAST OF CORBIN. TO REACH FROM THE INTERSECTION OF U.S. HIGHWAY 17 SOUTH BYPASS AND STATE HIGHWAY 2, LOCATED ABOUT 9.7 KM (6.00 MI) SOUTH-SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON STATE HIGHWAY 2 FOR 4.0 KM (2.50 MI) TO THE INTERSECTION OF STATE ROAD 610 (PEPMEIER HILL ROAD) ON THE LEFT IN THE SMALL COMMUNITY OF CORBIN. TURN LEFT AND GO EASTERLY ON STATE ROAD 610 FOR 0.7 KM (0.45 MI) TO A Y-JUNCTION WHERE STATE ROAD 610 MAKES A SHARP TURN TO THE LEFT AND A SECONDARY ROAD (OBSERVATORY ROAD) CONTINUES STRAIGHT AHEAD INTO THE GROUNDS OF THE FREDERICKSBURG GEOMAGNETIC CENTER. CONTINUE EASTERLY ON OBSERVATORY ROAD (U.S. PROPERTY) FOR 0.5 KM (0.30 MI) TO A CIRCLE DRIVEWAY ON THE LEFT. TURN LEFT AND GO NORTH CURVING TO EAST ON THE DRIVEWAY FOR APPROXIMATELY 190 M (623.4 FT) TO A GARAGE ON THE LEFT AND THE MARK JUST AHEAD AND TO THE RIGHT, IN TOP OF A 28 CM (11 IN) DIAMETER CONCRETE POST FLUSH WITH GROUND SURFACE, 66.8 M (219.2 FT) NORTH OF THE CENTER OF OBSERVATORY ROAD, 25.3 M (83.0 FT) NORTHEAST OF THE CENTER OF THE CIRCLE DRIVEWAY, 24.0 M (78.7 FT) SOUTHWEST OF STATION ASTRO WEST PIER AND 15.1 M (49.5 FT) SOUTHEAST OF THE SOUTHEAST CORNER OF BUILDING 11 (GPS BUILDING). RECOVERY NOTE BY US POWER SQUADRON 1999 RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY US POWER SQUADRON 2002 (EEC) RECOVERED IN GOOD CONDITION.K1975 GANGS NATIONAL GEODETIC SURVEY K19831003GANGS NATIONAL GEODETIC SURVEY K19910819GANGS NATIONAL GEODETIC SURVEY K19920824GANGS NATIONAL GEODETIC SURVEY K19940815GANGS NATIONAL GEODETIC SURVEY K19990210GKUSPSQDUS POWER SQUADRON K20020116GKUSPSQDUS POWER SQUADRON LN381204. W0772224. S83 M68.207 A88 1991060111N @1002HV7843GOBSERVATORY OBSERVATORY 1966 YUSVA033CAROLINE DDS07 CN ACGS US COAST AND GEODETIC SURVEY ANGS NATIONAL GEODETIC SURVEY CLS20060322P0000NNN0003JHV7845R 28.158 M03254 OBSERVATORY RM A JDC6985R 25.899 M06258 OBSERVATORY RM 2 JHV3122N 479.530 M0925624.4 TWIN OAK JHV3118A .5KM2932103.7 HILL AZ MK JHV7844R 24.680 M35506 OBSERVATORY RM 1 K1966 MACGS US COAST AND GEODETIC SURVEY LGB DESCRIBED BY COAST AND GEODETIC SURVEY 1966 (LGB) THE STATION IS LOCATED 6-3/4 MILES SOUTHEAST OF FREDERICKSBURG, 1 MILE EAST OF THE CORBIN POST OFFICE AND ON THE GROUND OF THE FREDERICKSBURG MAGNETIC OBSERVATORY. TO REACH THE STATION FROM THE POST OFFICE IN FREDERICKSBURG, GO EAST-SOUTHEAST ON U.S. HIGHWAY 17 AND STATE HIGHWAY 2 FOR 5.75 MILES TO THEIR JUNCTION. BEAR RIGHT AND GO SOUTHERLY ON STATE HIGHWAY 2 FOR 2.7 MILES TO THE JUNCTION OF COUNTY ROUTE 610 AND THE CORBIN POST OFFICE ON THE LEFT. TURN LEFT AND GO EAST ON COUNTY ROUTE 610 FOR 0.45 MILE TO A Y-FORK AND COUNTY ROUTE 612. BEAR RIGHT ON COUNTY ROUTE 612 FOR 0.3 MILE TO A CROSSROAD AND COUNTY ROUTE 612 TURNS RIGHT. CONTINUE AHEAD EAST ON BURMA ROAD FOR 0.15 MILE TO A DIM SIDE ROAD ON THE LEFT. TURN LEFT AND GO 0.05 MILE TO THE STATION. THE STATION MARK IS A STANDARD DISK, STAMPED OBSERVATORY 1966, SET IN THE TOP OF A 12-INCH ROUND CONCRETE MONUMENT THAT IS FLUSH WITH THE GROUND SURFACE. IT IS 236 FEET EAST-NORTHEAST OF THE SOUTHEAST CORNER OF A SMALL WHITE BUILDING, 175 FEET NORTH OF A TELEPHONE LINE POLE, 113 FEET SOUTHEAST OF THE CENTER OF A GRAVELED ROAD, 93 FEET WEST OF THE CENTER OF A DIM TRACK ROAD. REFERENCE MARK 1 IS A STANDARD DISK, STAMPED OBSERVATORY NO 1 1966, SET IN THE TOP OF A 12-INCH ROUND CONCRETE MONUMENT THAT IS FLUSH WITH THE GROUND SURFACE. IT IS 255 FEET NORTH OF A TELEPHONE LINE POLE, 231 FEET EAST-NORTHEAST OF THE SOUTHEAST CORNER OF A SMALL WHITE BUILDING, 96 FEET WEST OF THE CENTER OF A DIM TRACK ROAD AND 57 FEET SOUTHEAST OF THE CENTER OF A GRAVELED ROAD. REFERENCE MARK 2 IS A STANDARD DISK, STAMPED OBSERVATORY NO 2 1966, SET IN THE TOP OF A 12-INCH ROUND CONCRETE MONUMENT THAT IS FLUSH WITH THE GROUND SURFACE. IT IS 309 FEET EAST OF THE SOUTHEAST CORNER OF THE SMALL WHITE BUILDING, 152 FEET SOUTHEAST OF THE CENTER OF THE GRAVELED ROAD AND 16 FEET WEST OF THE CENTER OF THE TRACK ROAD. TRIANGULATION STATIONS HILL AZIMUTH MARK 1949 AND TWIN OAK 1949 MAY BE USED AS AZIMUTH MARKS FOR THIS STATION, SEE DESCRIPTIONS THEREOF. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1975 1.0 MI E FROM CORBIN. 0.40 MILES EAST ALONG STATE HIGHWAY 610 FROM THE POST OFFICE AT CORBIN, THENCE 0.60 MILE EAST ALONG BURMA ROAD, LOCATED ON THE GROUNDS OF THE DEPARTMENT OF INTERIOR FREDERICKSBURG GEOMAGNETIC CENTER, ABOUT 0.10 MILE EAST OF A 5-BAY GARAGE, 236 FEET EAST-NORTHEAST OF THE SOUTHEAST CORNER OF A SMALL WHITE BUILDING, 175 FEET NORTH OF A TELEPHONE LINE POLE, 113 FEET SOUTHEAST OF THE CENTER OF A ROCK ROAD, 93 FEET WEST OF THE CENTER OF A DIM TRACK ROAD, 80.9 FEET SOUTH OF REFERENCE MARK NO. 1, ABOUT LEVEL WITH THE ROCK ROAD AND SET IN THE TOP OF A CONCRETE POST FLUSH WITH THE GROUND. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992 THE STATION IS LOCATED ON U. S. GOVERNMENT PROPERTY AT THE FREDERICKSBURG GEOMAGNETIC CENTER IN CORBIN, CAROLINE COUNTY, VIRGINIA, APPROXIMATELY 9 MI (14.5 KM) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 10 MI (16.1 KM) NORTH OF BOWLING GREEN. TO INQUIRE ABOUT ACCESS TO THE STATION CALL THE CHIEF OF THE INSTRUMENT AND DEVELOPMENT SECTION OF THE NATIONAL GEODETIC SURVEY AT 703-373-7605 OR 373-1243. TO REACH THE STATION FROM THE JUNCTION OF US HWY 17 AND STATE HWY 2 SOUTH OF FREDERICKSBURG GO SOUTH ON STATE HWY 2 FOR 2.4 MI (3.9 KM) TO THE JUNCTION OF STATE ROAD 610 AT CORBIN. GO EAST ON 610 FOR 0.4 MI (0.6 KM) WHERE THE ROAD VEERS LEFT AND THE SIGN POINTS STRAIGHT AHEAD FOR THE FREDERICKSBURG GEOMAGNETIC CENTER. REPORT TO THE OFFICE BEFORE PROCEEDING TO THE STATION. FOLLOW THE SIGN EAST ON BURMA ROAD FOR 0.6 MI (1.0 KM) TO THE MARK ON THE LEFT IN A GRASS FIELD EAST OF THE OFFICE BUILDING. 212 FT (64.6 M) NORTH OF C/L OF BURMA ROAD 164.4 FT (50.1 M) SOUTHEAST OF 5 FOOT (1.5 M) HIGH STANDPIPE KNOWN AS ASTRO EAST PIER 111 FT (33.8 M) SOUTHEAST OF C/L OF A GRAVEL DRIVE RECOVERY NOTE BY US POWER SQUADRON 1999 RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1999 (BB) GOOD. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 2000 (WJR) THE 1992 RECOVERY IS GOOD. THE CONTACT IS NOW INSTRUMENT AND METHODOLOGIES BRANCH TELEPHONE 540-373-7605. BURMA ROAD IS NOW OBSERVATORY ROAD. RECOVERY NOTE BY US POWER SQUADRON 2002 (EEC) RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY VIRGINIA DEPARTMENT OF TRANSPORTATION 2005 (JCA) RECOVERED IN GOOD CONDITION.K1975 GANGS NATIONAL GEODETIC SURVEY K19831003GANGS NATIONAL GEODETIC SURVEY K19920311GANGS NATIONAL GEODETIC SURVEY K19990210GKUSPSQDUS POWER SQUADRON K19991116GANGS NATIONAL GEODETIC SURVEY BB K20001013GANGS NATIONAL GEODETIC SURVEY WJR K20020116GKUSPSQDUS POWER SQUADRON EEC K20050928GCVADOT VIRGINIA DEPARTMENT OF TRANSPORTATION JCA LN381206.79868W0772222.35067A83 199411011FM68.201 A88 1991060111N @1003HV3122GTWIN OAK TWIN OAK 1949 NUSVA033CAROLINE DDS07 CN ACGS US COAST AND GEODETIC SURVEY ANGS NATIONAL GEODETIC SURVEY CLS20060322P0000NNN0004JHV5420N 60.697 M00038 TT NO 17 JHV3125R 15.298 M01832 TWIN OAK RM 2 JHV7843A 479.530 M2725636.6 OBSERVATORY JHV7845R 466.104 M2755636.7 OBSERVATORY RM A JHV3123R 13.427 M30121 TWIN OAK RM 1 K1949 MACGS US COAST AND GEODETIC SURVEY ERM DESCRIBED BY COAST AND GEODETIC SURVEY 1949 (ERM) LOCATED APPROXIMATELY 1.2 MILES E OF THE CORBIN POST OFFICE, 15.6 METERS N OF THE CENTER LINE OF A GRAVEL ROAD KNOWN AS THE BURMA ROAD, IN THE SW CORNER OF THE FIRST SCOPE OF OAK AND PINE TREES GROWING ON THE N SIDE OF THE ROAD, 5 METERS SSE OF A 12-INCH TWIN OAK TREE. STATION MARK IS A BRONZE STATION DISK, STAMPED TWIN OAK 1949, AND SET IN CONCRETE. REFERENCE MARK 1 IS A BRONZE REFERENCE DISK SET IN CONCRETE. IT IS NW OF THE STATION, 18.5 METERS N OF THE CENTER LINE OF THE BURMA ROAD. REFERENCE MARK 2 IS A BRONZE REFERENCE DISK SET IN CONCRETE. IT IS NNE OF THE STATION, 31 METERS N OF THE CENTER LINE OF THE BURMA ROAD. RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1949 1.2 MI E FROM CORBIN. 1.2 MILES EAST OF THE POST OFFICE AT CORBIN, ON A GRAVEL ROAD KNOWN AS THE BURMA ROAD, IN THE SOUTHWEST CORNER OF AN AREA OF OAK AND PINE WOODS, 51.2 FEET NORTH OF THE CENTER LINE OF THE BURMA ROAD, AND 16.4 FEET SOUTH-SOUTHEAST OF A 12-INCH TWIN OAK TREE. SET IN THE TOP OF A CONCRETE POST. RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1966 (LGB) THE STATION, REFERENCE MARK 1 AND REFERENCE MARK 2 WERE FOUND IN GOOD CONDITION. NO PREVIOUS DESCRIPTION WAS AVAILABLE. A COMPLETE NEW DESCRIPTION FOLLOWS. THE STATION IS ABOUT 10-1/2 MILES NORTH OF BOWLING GREEN, 8-1/2 MILES SOUTHEAST OF FREDERICKSBURG, 3-1/2 MILES SOUTHEAST OF NEW POST, AND 1-1/2 MILES EAST OF CORBIN. IT IS ON THE GROUNDS OF THE FREDERICKSBURG MAGNETIC OBSERVATORY AND 0.25 MILE EAST OF TRIANGULATION STATION OBSERVATORY. TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 17 AND STATE HIGHWAY 2, 6 MILES SOUTHEAST OF FREDERICKSBURG, GO SOUTHERLY ON STATE HIGHWAY 2 FOR 2.65 MILES TO COUNTY ROUTE 610 ON THE LEFT, AT THE CORBIN POST OFFICE. TURN LEFT AND GO EAST ON COUNTY ROUTE 610 FOR 0.4 MILE TO COUNTY ROUTE 612. BEAR RIGHT ON COUNTY ROUTE 612 AND CONTINUE EAST FOR 0.3 MILE TO A CROSSROAD AND COUNTY ROUTE 612 TURNS TO THE RIGHT. KEEP STRAIGHT AHEAD AND CONTINUE EAST ON BURMA ROAD FOR 0.2 MILE TO A TRACK ROAD ON THE LEFT AND TRIANGULATION STATION OBSERVATORY ABOUT 100 FEET TO THE NORTH. CONTINUE EAST ON BURMA ROAD FOR 0.25 MILE TO THE STATION ON THE LEFT. THE STATION IS A STANDARD TRIANGULATION STATION DISK STAMPED TWIN OAK 1949, SET IN THE TOP OF A 12-INCH SQUARE CONCRETE MONUMENT AND PROJECTS 5 INCHES ABOVE THE GROUND. IT IS 52 FEET NORTH OF THE CENTER OF BURMA ROAD, 15.8 FEET SOUTHEAST OF THE TRUNK OF TWIN OAK TREES 24 INCHES IN DIAMETER, AND 18.8 FEET NORTH OF A PINE TREE 24 INCHES IN DIAMETER. REFERENCE MARK 1 IS A STANDARD REFERENCE MARK DISK STAMPED TWIN OAK RM 1 1949, SET IN THE TOP OF A 12-INCH SQUARE CONCRETE MONUMENT AND PROJECTING 5 INCHES ABOVE THE GROUND. IT IS 61 FEET NORTH OF THE CENTER OF BURMA ROAD AND 28 FEET WEST-NORTHWEST OF THE TRUND OF THE TWIN OAK TREES. REFERENCE MARK 2 IS A STANDARD REFERENCE MARK DISK STAMPED TWIN OAK RM 2 1949, SET IN THE TOP OF A 12-INCH SQUARE CONCRETE MONUMENT AND PROJECTING 5 INCHES ABOVE THE GROUND. IT IS 41 FEET NORTHEAST OF THE TRUNK OF THE TWIN OAK TREES AND 16 FEET EAST OF A DIM TRACK ROAD. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992 THE STATION IS LOCATED ON U. S. GOVERNMENT PROPERTY AT THE FREDERICKSBURG GEOMAGNETIC CENTER IN CORBIN, CAROLINE COUNTY, VIRGINIA, APPROXIMATELY 9 MI (14.5 KM) SOUTH-SOUTHEAST OF FREDERICKSBURG AND 10 MI (16.1 KM) NORTH OF BOWLING GREEN. TO INQUIRE ABOUT ACCESS TO THE STATION CALL THE CHIEF OF THE INSTRUMENT AND DEVELOPMENT SECTION OF THE NATIONAL GEODETIC SURVEY AT 703-373-7605 OR 373-1243. TO REACH THE STATION FROM THE JUNCTION OF US HWY 17 AND STATE HWY 2 SOUTH OF FREDERICKSBURG GO SOUTH ON STATE HWY 2 FOR 2.4 MI (3.9 KM) TO THE JUNCTION OF STATE ROAD 610 AT CORBIN. GO EAST ON 610 FOR 0.4 MI (0.6 KM) WHERE THE ROAD VEERS LEFT AND THE SIGN POINTS STRAIGHT AHEAD FOR THE FREDERICKSBURG GEOMAGNETIC CENTER. REPORT TO THE OFFICE BEFORE PROCEEDING TO THE STATION. FOLLOW THE SIGN EAST ON BURMA ROAD FOR 1.0 MI (1.6 KM) TO A LOCKED GATE AND THE MARK ON THE LEFT. A 4 FOOT (1.2 M) HIGH ALUMINUM STAND IS SET PERMANENTLY OVER THE MARK. 10.5 FT (3.2 M) NORTH OF A 24-INCH DIAMETER PINE TREE 15 FT (4.6 M) SOUTHEAST OF A LARGE TWIN TRUNK OAK TREE 54 FT (16.5 M) NORTH OF C/L OF BURMA ROAD 107 FT (32.6 M) NORTHWEST OF THE NORTH GATE POST RECOVERY NOTE BY US POWER SQUADRON 1999 RECOVERED IN GOOD CONDITION. RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 2000 (WJR) THE 1992 RECOVERY IS GOOD. THE CONTACT IS NOW INSTRUMENT AND METHODOLOGIES BRANCH TELEPHONE 540-373-7605. BURMA ROAD IS NOW OBSERVATORY ROAD. RECOVERY NOTE BY US POWER SQUADRON 2002 (EEC) RECOVERED IN GOOD CONDITION.K1949 GACGS US COAST AND GEODETIC SURVEY K1966 GACGS US COAST AND GEODETIC SURVEY LGB K19831003GANGS NATIONAL GEODETIC SURVEY K19920311GANGS NATIONAL GEODETIC SURVEY K19990210GKUSPSQDUS POWER SQUADRON K20001013GANGS NATIONAL GEODETIC SURVEY WJR K20020116GKUSPSQDUS POWER SQUADRON EEC LN381206.00051W0772202.66798A83 199411011FM65.676 A88 1991060111N