1 National Geodetic Survey, Retrieval Date = MAY 3, 2005 JV3942 *********************************************************************** JV3942 DESIGNATION - K 146 JV3942 PID - JV3942 JV3942 STATE/COUNTY- MD/WASHINGTON JV3942 USGS QUAD - KEEDYSVILLE (1988) JV3942 JV3942 *CURRENT SURVEY CONTROL JV3942 ___________________________________________________________________ JV3942* NAD 83(1986)- 39 26 34. (N) 077 41 12. (W) SCALED JV3942* NAVD 88 - 170.028 (meters) 557.83 (feet) ADJUSTED JV3942 ___________________________________________________________________ JV3942 GEOID HEIGHT- -33.56 (meters) GEOID03 JV3942 DYNAMIC HT - 169.928 (meters) 557.51 (feet) COMP JV3942 MODELED GRAV- 980,034.0 (mgal) NAVD 88 JV3942 JV3942 VERT ORDER - FIRST CLASS II JV3942 JV3942.The horizontal coordinates were scaled from a topographic map and have JV3942.an estimated accuracy of +/- 6 seconds. JV3942 JV3942.The orthometric height was determined by differential leveling JV3942.and adjusted by the National Geodetic Survey in June 1991. JV3942 JV3942.The geoid height was determined by GEOID03. JV3942 JV3942.The dynamic height is computed by dividing the NAVD 88 JV3942.geopotential number by the normal gravity value computed on the JV3942.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 JV3942.degrees latitude (g = 980.6199 gals.). JV3942 JV3942.The modeled gravity was interpolated from observed gravity values. JV3942 JV3942; North East Units Estimated Accuracy JV3942;SPC MD - 197,380. 340,890. MT (+/- 180 meters Scaled) JV3942 JV3942 SUPERSEDED SURVEY CONTROL JV3942 JV3942.No superseded survey control is available for this station. JV3942 JV3942_U.S. NATIONAL GRID SPATIAL ADDRESS: 18STJ687693(NAD 83) JV3942_MARKER: DB = BENCH MARK DISK JV3942_SETTING: 49 = STAINLESS STEEL ROD W/O SLEEVE (10 FT.+) JV3942_SP_SET: STAINLESS STEEL ROD JV3942_STAMPING: K 146 1979 JV3942_PROJECTION: FLUSH JV3942_MAGNETIC: O = OTHER; SEE DESCRIPTION JV3942_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL JV3942_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR JV3942+SATELLITE: SATELLITE OBSERVATIONS - March 30, 2005 JV3942_ROD/PIPE-DEPTH: 4.27 meters JV3942 JV3942 HISTORY - Date Condition Report By JV3942 HISTORY - 1979 MONUMENTED NGS JV3942 HISTORY - 1988 GOOD USPSQD JV3942 HISTORY - 19990226 GOOD GEOMET JV3942 HISTORY - 20050330 GOOD DEWDAV JV3942 JV3942 STATION DESCRIPTION JV3942 JV3942'DESCRIBED BY NATIONAL GEODETIC SURVEY 1979 JV3942'3.55 MI SE FROM KEEDYSVILLE. JV3942'0.1 MILE SOUTH ALONG SOUTH MAIN STREET FROM THE POST OFFICE IN JV3942'KEEDYSVILLE, THENCE 0.85 MILE SOUTHEAST ALONG DOG STREET ROAD, JV3942'THENCE 2.60 MILE SOUTHEAST ALONG MT BRIAR ROAD (EAKLES MILL ROAD) JV3942'TO THE MARK ON THE RIGHT, SET AT THE SOUTHEAST END OF A METAL GUARD- JV3942'RAIL, 109 FEET NORTH NORTHWEST OF THE CENTER OF THE JUNCTION OF JV3942'PORTERSTOWN ROAD AND MT BRIAR ROAD, 98 FEET NORTHWEST OF THE JV3942'CENTER LINE OF MT BRIAR ROAD, 67 FEET NORTHWEST OF POWER POLE NUMBER JV3942'37, 53 FEET SOUTHEAST OF THE SOUTHEAST RAIL OF THE TRACKS, 32 FEET JV3942'NORTHEAST OF POWER POLE NUMBER 1, AND 12 FEET NORTHEAST OF THE JV3942'CENTER LINE OF PORTERSTOWN ROAD. JV3942'THE MARK IS 2 FT N FROM A WITNESS POST. JV3942'THE MARK IS ABOVE LEVEL WITH ROAD. JV3942 JV3942 STATION RECOVERY (1988) JV3942 JV3942'RECOVERY NOTE BY US POWER SQUADRON 1988 (WPG) JV3942'RECOVERED IN GOOD CONDITION. JV3942 JV3942 STATION RECOVERY (1999) JV3942 JV3942'RECOVERY NOTE BY GEOMETRICS GPS INCORPORATED 1999 (FJ) JV3942'MARK IS 6 SECOND BELOW GROUND ELEVATION INSIDE A 4 SECOND PVC PIPE. JV3942 JV3942 STATION RECOVERY (2005) JV3942 JV3942'RECOVERY NOTE BY DEWBERRY DAVIS 2005 (KEC) JV3942'RECOVERED IN GOOD CONDITION. 1 National Geodetic Survey, Retrieval Date = MAY 3, 2005 JV4628 *********************************************************************** JV4628 DESIGNATION - MARYLAND HEIGHTS RESET JV4628 PID - JV4628 JV4628 STATE/COUNTY- MD/WASHINGTON JV4628 USGS QUAD - HARPERS FERRY (1988) JV4628 JV4628 *CURRENT SURVEY CONTROL JV4628 ___________________________________________________________________ JV4628* NAD 83(1991)- 39 20 27.75147(N) 077 42 59.04177(W) ADJUSTED JV4628* NAVD 88 - 443.8 (meters) 1456. (feet) VERTCON JV4628 ___________________________________________________________________ JV4628 LAPLACE CORR- 6.47 (seconds) DEFLEC99 JV4628 GEOID HEIGHT- -33.41 (meters) GEOID03 JV4628 JV4628 HORZ ORDER - FIRST JV4628 JV4628.The horizontal coordinates were established by classical geodetic methods JV4628.and adjusted by the National Geodetic Survey in November 1994. JV4628 JV4628.The NAVD 88 height was computed by applying the VERTCON shift value to JV4628.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) JV4628 JV4628.The Laplace correction was computed from DEFLEC99 derived deflections. JV4628 JV4628.The geoid height was determined by GEOID03. JV4628 JV4628; North East Units Scale Factor Converg. JV4628;SPC MD - 186,109.256 338,241.520 MT 0.99998276 -0 26 58.7 JV4628;SPC MD - 610,593.45 1,109,714.05 sFT 0.99998276 -0 26 58.7 JV4628;SPC VA N - 2,186,151.461 3,567,554.416 MT 1.00002808 +0 29 20.6 JV4628;UTM 18 - 4,358,142.918 265,898.071 MT 1.00027482 -1 43 22.1 JV4628 JV4628! - Elev Factor x Scale Factor = Combined Factor JV4628!SPC MD - 0.99993562 x 0.99998276 = 0.99991838 JV4628!SPC VA N - 0.99993562 x 1.00002808 = 0.99996369 JV4628!UTM 18 - 0.99993562 x 1.00027482 = 1.00021042 JV4628 JV4628: Primary Azimuth Mark Grid Az JV4628:SPC MD - MARYLAND HEIGHTS AZ MK 2 113 24 07.6 JV4628:SPC VA N - MARYLAND HEIGHTS AZ MK 2 112 27 48.3 JV4628:UTM 18 - MARYLAND HEIGHTS AZ MK 2 114 40 31.0 JV4628 JV4628|---------------------------------------------------------------------| JV4628| PID Reference Object Distance Geod. Az | JV4628| dddmmss.s | JV4628| CK7839 MARYLAND HEIGHTS RM 1 05143 | JV4628| CK7841 MARYLAND HEIGHTS RM 1 RESET 3.455 METERS 05150 | JV4628| CK7842 MARYLAND HEIGHTS RM 2 5.570 METERS 08925 | JV4628| CK7843 MARYLAND HEIGHTS RM 3 5.607 METERS 08941 | JV4628| CK8065 SUGAR LOAF AZ MK 1081448.1 | JV4628| CK7840 MARYLAND HEIGHTS AZ MK 1081448.5 | JV4628| CK7846 MARYLAND HEIGHTS AZ MK 2 1125708.9 | JV4628| JV4629 KNOXVILLE IRON FOUNDRY CHIMNEY APPROX. 5.2 KM 1130654.5 | JV4628| CK7845 MARYLAND HEIGHTS AZ MK RESET 1184840.5 | JV4628| JV4635 LEESBURG APPROX.26.1 KM 1540922.8 | JV4628| CK7844 MARYLAND HEIGHTS RM 4 19.280 METERS 19241 | JV4628| JV4626 MARYLAND HEIGHTS S APPROX. 0.6 KM 2020226.8 | JV4628| JV4657 KEYS GAP AIRWAY BEACON APPROX.12.3 KM 2022432.4 | JV4628| JV4663 FORT DUNCAN FLAGSTAFF APPROX. 2.9 KM 2721835.0 | JV4628|---------------------------------------------------------------------| JV4628 JV4628 SUPERSEDED SURVEY CONTROL JV4628 JV4628 NAD 83(1991)- 39 20 27.75326(N) 077 42 59.04416(W) AD( ) 1 JV4628 NAD 83(1986)- 39 20 27.75188(N) 077 42 59.05140(W) AD( ) 1 JV4628 NAD 27 - 39 20 27.38800(N) 077 43 00.07700(W) AD( ) 1 JV4628 NGVD 29 (07/19/86) 444.0 (m) 1457. (f) VERT ANG JV4628 JV4628.Superseded values are not recommended for survey control. JV4628.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. JV4628.See file dsdata.txt to determine how the superseded data were derived. JV4628 JV4628_U.S. NATIONAL GRID SPATIAL ADDRESS: 18STJ6589858143(NAD 83) JV4628_MARKER: X = CHISELED CROSS JV4628_SETTING: 80 = SET IN A BOULDER JV4628_SP_SET: IN A DRILL HOLE IN ROCK LEDGE JV4628 JV4628 HISTORY - Date Condition Report By JV4628 HISTORY - 1957 MONUMENTED CGS JV4628 HISTORY - 1887 SEE DESCRIPTION CGS JV4628 HISTORY - 1927 SEE DESCRIPTION CGS JV4628 HISTORY - 1933 SEE DESCRIPTION CGS JV4628 HISTORY - 1939 GOOD CGS JV4628 HISTORY - 1942 GOOD CGS JV4628 HISTORY - 1950 GOOD CGS JV4628 HISTORY - 1957 SEE DESCRIPTION CGS JV4628 HISTORY - 1958 GOOD CGS JV4628 HISTORY - 20040823 GOOD GEOCAC JV4628 JV4628 STATION DESCRIPTION JV4628 JV4628'DESCRIBED BY COAST AND GEODETIC SURVEY 1887 JV4628'ON THE WELL-KNOWN MOUNTAIN OF MARYLAND HEIGHTS, ACROSS THE JV4628'POTOMAC RIVER FROM AND OVERLOOKING HARPERS FERRY, AND JUST S OF JV4628'THE STONE FORT, AND ON LAND OWNED (IN 1869) BY JAMES GROVES, OF JV4628'SHARPSBURG, MD. JV4628' JV4628'THE STATION WAS MARKED AS FOLLOWS--UNDERGROUND MARK IS A CROSS JV4628'CUT IN THE HEAD OF A COPPER BOLT SET IN A LARGE ROCK 2 FEET BELOW JV4628'THE SURFACE OF THE GROUND. THE FACE OF THIS ROCK HAS A DIP OF JV4628'ABOUT 45 DEG, BUT A SMALL SHELF WAS CUT INTO IT AT THE STATION, JV4628'IN WHICH THE HOLE TO RECEIVE THE BOLT WAS DRILLED 3/4 INCH IN JV4628'DIAMETER AND 1-3/4 INCHES DEEP. A STONE POST 2 FEET LONG WAS JV4628'PLACED UPON THIS SHELF AND THE CENTER MARKED ON THIS POST BY JV4628'THE INTERSECTION OF TWO DEEPLY CUT DIAGONAL LINES. THESE LINES JV4628'RUN N AND S AND E AND W. THE EXTREME SOUTHERN CORNER OF THE JV4628'OLD STONE FORT IS 18.20 METERS (59.7 FEET) NW OF THE STATION, THE JV4628'FIRST EXTERIOR ANGLE OF THE S WALL TO THE W OF THIS CORNER JV4628'IS 9.88 METERS (32.41 FEET) A LITTLE W OF N FROM THE JV4628'STATION, AND THE SECOND EXTERIOR ANGLE OF THE S WALL FROM JV4628'THE S CORNER IS 15.15 METERS (49.7 FEET) NW FROM THE STATION. JV4628'IN 1871 FIVE REFERENCE MARKS WERE ESTABLISHED BY CUTTING FIVE JV4628'SQUARES UPON ROCKS NEAR THE STATION. EACH SQUARE WAS 6 JV4628'INCHES ON A SIDE, WITH ITS DIAGONALS IN LINE WITH THE JV4628'STATION AND AT RIGHT ANGLES TO THAT DIRECTION. AN ARROW JV4628'POINTS FROM THE CENTER OF EACH SQUARE TOWARD THE STATION. THESE JV4628'MARKS ARE AT THE FOLLOWING DISTANCES AND BEARINGS FROM THE JV4628'STATION--7.26 METERS (23.82 FEET), N 83 DEG 46 MIN W. 8.53 JV4628'METERS (27.99 FEET), N 18 DEG 30 MIN W. 11.17 METERS (36.6 JV4628'FEET), N 51 DEG 39 MIN E. 18.25 METERS (59.9 FEET), JV4628'N 89 DEG 46 MIN E. 10.16 METERS (33.3 FEET), S 19 DEG 11 MIN E. JV4628 JV4628 STATION RECOVERY (1927) JV4628 JV4628'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1927 (WM) JV4628'FOUND AS DESCRIBED EXCEPT THAT SURFACE MARK HAS DISAPPEARED, AND JV4628'THE DISTANCES TO REFERENCE MARKS REFERRED TO IN METERS, MEANS IN JV4628'FEET. JV4628' JV4628'NEW STATION MARK ESTABLISHED OVER OLD SUB-SURFACE MARK AND TWO JV4628'STANDARD REFERENCE MARKS PLACED ON LOCATION MARK BY ARROWS. JV4628' JV4628'HEIGHT OF LOW STAND USED AUGUST 5-11 = 4.36 FEET. JV4628' JV4628'HEIGHT OF HIGH STAND USED AUGUST 12 AND AFTER = 23.67 FEET. JV4628' JV4628'MR. JAMES M. RANSON, HARPERS FERRY, W.VA., REPORTED ON APRIL 16, JV4628'1932 THAT REFERENCE MARK NO.1 HAD BEEN DESTROYED. THE BRONZE DISK JV4628'WHICH WAS FORWARDED TO THE OFFICE BY HIM RECEIVED MAY 31, 1932. JV4628 JV4628 STATION RECOVERY (1933) JV4628 JV4628'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1933 (MAH) JV4628'THE STATION WAS RECOVERED AS DESCRIBED BY WILLIAM MUSSETTER IN JV4628'1927. THE BRONZE DISK MARKING REFERENCE MARK NO.1 HAD BEEN JV4628'DESTROYED BUT THE OLD DRILL HOLE WAS RECOVERED. A STANDARD DISK JV4628'WAS RESET IN THIS OLD DRILL HOLE. JV4628' JV4628'TO REACH THE STATION FROM THE POST OFFICE IN HARPERS FERRY--GO JV4628'1.4 MILES NE ON U.S. HIGHWAY 340 AND TURN LEFT ON AN ASPHALT JV4628'ROAD JUST BEFORE REACHING A STONE BRIDGE. CONTINUE 0.55 MILES JV4628'AND TURN LEFT ON TO A DIRT ROAD. PROCEED 0.5 MILE AND TURN JV4628'LEFT. CONTINUE 0.2 MILE TO THE END OF TRUCK TRAVEL. FROM HERE JV4628'TAKE TRAIL UP MOUNTAIN, BEARING RIGHT, TO THE TOP OF THE JV4628'RIDGE. TURN RIGHT AND FOLLOW ALONG THE TOP OF THE RIDGE TO AN JV4628'OLD FORT. STATION IS JUST S OF THE OLD FORT. JV4628' JV4628'TOTAL CLIMB - 1-3/4 MILES. JV4628 JV4628 STATION RECOVERY (1939) JV4628 JV4628'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1939 (APR) JV4628'STATION RECOVERED IN GOOD CONDITION. IT IS ON THE TOP OF A BRUSH JV4628'AND TIMBER COVERED MOUNTAIN LOCALLY KNOWN AS MARYLAND HEIGHTS, JV4628'ACROSS THE POTOMAC RIVER FROM AND OVERLOOKING HARPERS FERRY. IT JV4628'IS ABOUT 30 FEET S OF THE S WALL OF AN OLD STONE FORT. NONE JV4628'OF THE REFERENCES ON THIS OLD FORT COULD BE RECOVERED AS THE JV4628'WALLS HAVE FALLEN DOWN AND TREES GROWN UP THROUGH THEM. THE JV4628'REMAINS OF THE FORT CANNOT BE SEEN FROM A DISTANCE OF MORE JV4628'THAN 20 OR 30 FEET. JV4628' JV4628'THE UNDERGROUND MARK IS A CROSS CUT IN THE TOP OF JV4628'A COPPER BOLT SET IN BEDROCK ABOUT 2 FEET BELOW THE SURFACE. JV4628' JV4628'THE SURFACE MARK PROJECTS ABOUT 2 INCHES AND IS STAMPED JV4628'MARYLAND HEIGHTS, 1927 1933. JV4628' JV4628'REFERENCE MARK NO.1 3.400 METERS, STAMPED MARYLAND JV4628'HEIGHTS 1927. JV4628' JV4628'REFERENCE MARK NO.2 5.570 METERS, STAMPED MARYLAND JV4628'HEIGHTS 1927. JV4628' JV4628'AZIMUTH IS ABOUT 0.7 MILE E OF THE STATION, 30 FEET JV4628'N OF A POWER AND LIGHT POLE NO.14984. 1 FOOT NW OF W RIGHT-OF-WAY JV4628'FENCE. 13 FEET W OF THE CENTER OF A NARROW PAVED ROAD AND 125 JV4628'FEET NE OF AN ENTRANCE TO A FARM LANE. JV4628' JV4628'REACHED FROM THE INTERSECTION OF U.S. HIGHWAYS 15, 40 AND 340 JV4628'IN FREDERICK BY GOING SW ON U.S. HIGHWAY 340, 15.8 MILES TO JV4628'KNOXVILLE. THENCE CONTINUE ON U.S. HIGHWAY 340 FOR 2.1 MILES TO JV4628'THE POTOMAC VIEW ROADHOUSE ON THE LEFT. THENCE CONTINUE STRAIGHT JV4628'AHEAD 0.25 MILE TO A NARROW PAVED ROAD TO THE RIGHT. THENCE JV4628'LEAVE U.S. HIGHWAY 340, TURN RIGHT AND GO NORTHERLY ON NARROW JV4628'PAVED ROAD UP CANYON FOR 0.55 MILE TO A DIRT ROAD TO THE JV4628'LEFT. THENCE LEFT, (W), TOWARDS MOUNTAIN FOR 0.45 MILE TO A JV4628'T-ROAD, THEN LEFT, (S), FOR 0.1 MILE TO END OF TRUCK TRAVEL JV4628'WHERE A DIM TRAIL LEADS OFF TO THE RIGHT JUST S OF A FENCE JV4628'CORNER. FROM HERE FOLLOW TRAIL TO THE W A SHORT DISTANCE JV4628'TO CROSS TRAILS, THEN A SHORT DISTANCE FURTHER TO A FORK. JV4628'THENCE RIGHT FORK AND FOLLOW DIM TRAIL UP THROUGH THE WOODS JV4628'ON WHAT WAS APPARENTLY AN OLD ROAD BED TO A DIM ROCK WALL JV4628'RUNNING LEFT UP THE MOUNTAIN, THEN LEFT ALONG THE WALL TO TOP JV4628'OF RIDGE AND STATION. JV4628' JV4628'DISTANCE AND DIRECTIONS TO REFERENCE MARKS CHECKED. AN AZIMUTH JV4628'MARK WAS ESTABLISHED. JV4628' JV4628'MARYLAND HEIGHTS (S) NOT SEARCHED FOR AS IT REQUIRED EXTENSIVE JV4628'CLEARING. JV4628 JV4628 STATION RECOVERY (1942) JV4628 JV4628'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1942 (PLB) JV4628'STATION AND REFERENCE MARKS RECOVERED AND FOUND IN GOOD JV4628'CONDITION. FOLLOWING IS A NEW DESCRIPTION-- JV4628' JV4628'STATION IS ABOUT 3 MILES W OF BRUNSWICK, 1.5 MILES WSW OF JV4628'KNOXVILLE, AND 0.8 MILE NNW OF HARPERS FERRY, ON THE N END OF A JV4628'BRUSH AND TIMBER-COVERED MOUNTAIN LOCALLY KNOWN AS MARYLAND JV4628'HEIGHTS. THE DISK IS SET IN BEDROCK ABOUT 1 BY 2 FEET IN JV4628'DIAMETER, PROJECTS 2 INCHES, AND IS STAMPED MARYLAND HEIGHTS. JV4628'1927-1933. JV4628' JV4628'REFERENCE MARK 1 IS N OF THE STATION, SET IN OUTCROPPING JV4628'BEDROCK. IT IS STAMPED MARYLAND HEIGHTS 1927 AND PROJECTS ABOUT JV4628'8 IN. JV4628' JV4628'REFERENCE MARK 2 IS NE OF THE STATION, SET IN BEDROCK. IT IS JV4628'STAMPED MARYLAND HEIGHTS NO 2 1927 AND PROJECTS ABOUT 18 IN. JV4628' JV4628'AZIMUTH MARK IS ABOUT 0.7 MI. E OF THE STATION, 30 FT. N OF JV4628'POWER AND LIGHT POLE NO. 14984, 13 FT. W OF THE CENTER OF THE JV4628'NARROW MACADAM ROAD, AND 125 FT. NE OF A FARM LANE. DISK IS JV4628'STAMPED MARYLAND HEIGHTS 1939 AND PROJECTS 3 IN. TO REACH AT JV4628'THE END OF THE 0.55 MI. FROM U.S. HIGHWAY 340, CONTINUE N ON A JV4628'NARROW PAVED ROAD FOR 0.05 MI. TO THE MARK ON THE LEFT. JV4628' JV4628'TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 340 AND JV4628'STATE ROUTE 17 IN KNOXVILLE, GO S ON HIGHWAY 340 FOR 2.35 MI. TO JV4628'A MACADAM ROAD RIGHT JUST AFTER CROSSING A CONCRETE BRIDGE, TURN JV4628'SHARP RIGHT AND GO N ON THE MACADAM ROAD FOR 0.55 MI. TO A DIRT JV4628'ROAD LEFT, TURN LEFT AND GO W ON THE DIRT ROAD FOR 0.45 MI. TO A JV4628'T-INTERSECTION, TURN LEFT AND GO S ON A WOODS ROAD FOR 0.1 JV4628'MI. TO THE END OF TRUCK TRAVEL WHERE A DIM TRAIL LEADS OFF TO JV4628'THE RIGHT, FROM THIS POINT PACK W AND NW ON A BLAZED TRAIL TO JV4628'THE TOP OF THE RIDGE AND STATION ON THE HIGHEST POINT, PACK WILL JV4628'REQUIRE ABOUT ONE HOUR. JV4628' JV4628'A 26-FT. WOOD TOWER REQUIRED TO CLEAR ALL LINES. JV4628 JV4628 STATION RECOVERY (1950) JV4628 JV4628'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1950 (HHH) JV4628'I WAS UNABLE TO FOLLOW THE DIRECTIONS FOR REACHING STATION. THE JV4628'PATHS HAVE APPARENTLY BEEN CHANGED. ACTUALLY, I GOT THERE BY JV4628'WALKING STRAIGHT UP THE SIDE OF THE MOUNTAIN. IT WAS EASY TO JV4628'FIND THE STATION, BECAUSE THE OLD TRIANGULATION TOWER WAS STILL JV4628'STANDING. CONTRARY TO THE U.S.E. QUAD, STATION IS NOT ON THE JV4628'S-MOST PEAK OF THE MOUNTAIN, ANOTHER OF ABOUT THE SAME HEIGHT IS JV4628'TO THE S, WITH A SHALLOW PASS IN BETWEEN. JV4628' JV4628'SPEEDOMETER DISTANCES WERE REMEASURED. A NEW DESCRIPTION (BASED JV4628'ON A PATH USED IN RETURNING) FOLLOWS-- JV4628' JV4628'STATION IS ON TOP OF A MOUNTAIN ACROSS POTOMAC RIVER FROM JV4628'HARPERS FERRY (ON THE U.S.E. QUAD THE MOUNTAIN IS KNOWN AS ELK JV4628'RIDGE). FOLLOW U.S. HIGHWAY 340 TO A POINT 1.3 MI. W OF THE JV4628'HIGHWAY JUNCTION IN WEVERTON, OR 0.25 MI. NE OF THE NE END OF THE JV4628'NEW BRIDGE FROM MARYLAND TO VIRGINIA. HERE TURN N ONTO A NARROW JV4628'HARD-SURFACED ROAD, FOLLOW THE ROAD N FOR 0.6 MI. TURN W ONTO A JV4628'NARROW DIRT ROAD (IT SOON BECOMES ROUGH AND ROCKY), FOLLOW THE JV4628'ROAD W FOR 0.5 MI. TO A T-JUNCTION (IN 1950, BEST WAY WAS TO LEAVE JV4628'CAR HERE), AND GO N FOR A 1/4 MI. TO A SAWMILL. GO W TO THE TOP JV4628'OF THE MOUNTAIN (FOLLOWING A TRAIL USED TO HAUL LOGS). GO S JV4628'ALONG CREST FOR ABOUT 1/4 MI. (PAST EARTHWORKS, PITS AND JV4628'TRENCHES) TO THE RUINS OF THE MASSIVE STONE WALLS OF AN OLD JV4628'FORT (PERHAPS 200 FT. NS AND 100 FT. EW) OVERLOOKING THE E JV4628'SLOPE OF THE MOUNTAIN. STATION IS ABOUT 50 FT. S OF JV4628'THE S END OF THE FORT. JV4628' JV4628'STATION AND REFERENCE MARKS 1 AND 2 WERE FOUND. DISTANCES NOT JV4628'CHECKED. STAMPED AS DESCRIBED. DESCRIPTION OF THE AZIMUTH JV4628'MARK WAS INADEQUATE. A NEW DESCRIPTION FOLLOWS-- JV4628' JV4628'LEAVE U.S. HIGHWAY 340 AT THE POINT DESCRIBED ABOVE. TRAVEL JV4628'N ON A HARD-SURFACED ROAD FOR 0.45 MI. STATION IS JV4628'1 FT. W OF A LINE OF POSTS MARKING W EDGE OF A RIGHT-OF-WAY, AT JV4628'A POINT 125 FT. N OF THE FARM LANE THAT IS IDENTIFIED BY A SMALL JV4628'STONE-BUILDING, NEAR THE ROAD IN FRONT OF A HOUSE. JV4628 JV4628 STATION RECOVERY (1957) JV4628 JV4628'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1957 (FAR) JV4628'THE STATION-MARK DRILL HOLE WAS RECOVERED, AND REFERENCE MARK 1 JV4628'WAS FOUND TO BE IN FAIR CONDITION. REFERENCE MARK 2 AND THE JV4628'AZIMUTH MARK WERE FOUND TO BE DESTROYED. JV4628' JV4628'A NEW STATION MARK WAS SET IN THE OLD DRILL HOLE, THUS REMAKING JV4628'THE CENTER OF THE STATION. A NEW REFERENCE MARK 3 WAS SET IN JV4628'THE OLD DRILL HOLE WHICH WAS REFERENCE MARK 2, AND A NEW JV4628'REFERENCE MARK 4 AND AN AZIMUTH MARK WERE SET. JV4628' JV4628'A COMPLETE NEW DESCRIPTION FOLLOWS-- JV4628' JV4628'THE STATION IS ABOUT 3 MI. W OF BRUNSWICK, 1-1/2 MI. W-SW OF JV4628'KNOXVILLE, AND 3/4 MI. N-NW OF HARPERS FERRY (OVERLOOKING THE JV4628'POTOMAC RIVER TO THE S), ON THE N END OF A TIMBER-COVERED HILL JV4628'(LOCALLY KNOWN AS MARYLAND HEIGHTS), AND IS ON THE PROPERTY OF JV4628'MR. JAMES H. SMITH. JV4628' JV4628'TO REACH THE STATION THE N END OF THE BRIDGE OVER THE POTOMAC JV4628'RIVER, GO N ON U.S. HIGHWAY 340 FOR 0.25 MI. TO SANDY HOOK ROAD JV4628'ON THE LEFT. TURN LEFT AND GO NW (UP A CANYON) FOR 0.4 MI. TO JV4628'BROWN ROAD. CONTINUE STRAIGHT AHEAD FOR 0.2 MI. TO A SIDE ROAD JV4628'LEFT, JUST BEFORE REACHING A TWO-STORY STONE HOUSE. (*) TURN JV4628'LEFT AND FOLLOW THE DIRT ROAD THROUGH WOODS FOR 0.5 MI. TO A JV4628'T-ROAD JUNCTION AND THE END OF TRUCK TRAVEL. PACK DUE W ON A JV4628'BLAZED TRAIL TO THE SUMMIT OF THE STATION. JV4628' JV4628'(*) TO REACH THE AZIMUTH MARK, CONTINUE STRAIGHT AHEAD FOR JV4628'0.05 MI. TO A FIELD ENTRANCE ON THE RIGHT, JUST OPPOSITE A JV4628'RED BARN. TURN RIGHT AND GO E ALONG THE N SIDE OF A FENCE FOR JV4628'0.1 MI. TO THE GATE ON THE RIGHT. PASS THROUGH THE GATE AND JV4628'CONTINUE E ALONG THE S SIDE OF A FENCE FOR 0.15 MI. TO THE JV4628'AZIMUTH MARK. JV4628' JV4628'STATION MARK IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS 1869 JV4628'1957, CEMENTED IN A DRILL HOLE IN A BOULDER ABOUT 1- BY JV4628'2-FT. PROJECTING ABOUT 4 IN. IT IS 10 FT. S-SE OF A TRIANGULAR JV4628'BLAZE ON AN APPLE TREE. THE ORIGINAL DESCRIPTION STATES THAT JV4628'THE UNDERGROUND MARK IS A CROSS CUT IN THE HEAD OF A COPPER BOLT JV4628'AND SET IN A LARGE ROCK 2 FT. BELOW THE SURFACE OF THE GROUND. JV4628' JV4628'REFERENCE MARK 1 IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS JV4628'NO 1 1927, CEMENTED IN A DRILL HOLE IN A BOULDER 3- BY JV4628'3-FT. PROJECTING 2 FT. ON THE E SIDE. JV4628' JV4628'REFERENCE MARK 3 IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS JV4628'NO 3 1869 1957, CEMENTED IN A DRILL HOLE IN A BOULDER PROJECTING JV4628'ABOUT 14 IN. ON THE W SIDE. JV4628' JV4628'REFERENCE MARK 4 IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS JV4628'NO 4 1869 1957, CEMENTED IN A DRILL HOLE IN A BOULDER ABOUT 16 JV4628'IN. IN DIAMETER PROJECTING 4 IN. JV4628' JV4628'THE AZIMUTH MARK IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS JV4628'1957, IS SET IN A SQUARE CONCRETE POST PROJECTING 4 IN. IT IS JV4628'21 FT. S OF A T-JUNCTION OF A RAIL FENCE WITH A WOVEN-WIRE FENCE, JV4628'AND 1 FT. W OF THE WOVEN-WIRE FENCE. A STANDARD WITNESS POST WAS JV4628'SET 2 FT. N-NE OF THE MARK. JV4628' JV4628'1957 OBSERVATIONS TAKEN FROM A 50-FT STEEL TOWER. JV4628 JV4628 STATION RECOVERY (1958) JV4628 JV4628'RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 (LFV) JV4628'STATION, REFERENCE MARK NO. 1, NO. 3, AND NO. 4 RECOVERED IN GOOD JV4628'CONDITION. AZIMUTH MARK NOT SEARCHED FOR. STATION NOT OCCUPIED JV4628'BY THIS PARTY. DESCRIPTION BY FAR IN 1957 RECOVERY NOTE ADEQUATE JV4628'AND CORRECT. JV4628 JV4628 STATION RECOVERY (2004) JV4628 JV4628'RECOVERY NOTE BY GEOCACHING 2004 (TAK) JV4628'FROM THE INTERSECTION OF KEEP TRYST ROAD AND SANDY HOOK ROAD, TAKE JV4628'SANDY HOOK ROAD WEST FOR 2.1 MILES. PARK AND WALK UP THE FIRE ROAD. AT JV4628'N 39 19 40 W 77 43 30, LEAVE THE FIRE ROAD TO TAKE THE TRAIL NNW TO JV4628'THE TOP OF THE RIDGE AND THEN NNW ALONG THE RIDGE TO THE STATION ON JV4628'THE LEFT EDGE OF THE TRAIL. THE MARK IS 9 FEET 10 INCHES NW OF AN 8 JV4628'INCH BLACK CHERRY TREE. JV4628' JV4628'REFERENCE MARKS 1 AND 3 WERE ALSO FOUND. REFERENCE MARK 4 WAS NOT JV4628'FOUND. THE AZIMUTH MARK WAS NOT SEARCHED. JV4628' JV4628'THE MARKER TYPE SHOULD BE CHANGED TO A DISK, ACCORDING TO THE 1957 JV4628'DESCRIPTION. JV4628'THE STAMPING IS JV4628'MARYLAND HEIGHTS 1869 1957 1 National Geodetic Survey, Retrieval Date = MAY 3, 2005 JV3949 *********************************************************************** JV3949 DESIGNATION - R 146 JV3949 PID - JV3949 JV3949 STATE/COUNTY- MD/WASHINGTON JV3949 USGS QUAD - FUNKSTOWN (1985) JV3949 JV3949 *CURRENT SURVEY CONTROL JV3949 ___________________________________________________________________ JV3949* NAD 83(1986)- 39 30 15. (N) 077 43 41. (W) SCALED JV3949* NAVD 88 - 141.606 (meters) 464.59 (feet) ADJUSTED JV3949 ___________________________________________________________________ JV3949 GEOID HEIGHT- -33.86 (meters) GEOID03 JV3949 DYNAMIC HT - 141.522 (meters) 464.31 (feet) COMP JV3949 MODELED GRAV- 980,036.3 (mgal) NAVD 88 JV3949 JV3949 VERT ORDER - FIRST CLASS II JV3949 JV3949.The horizontal coordinates were scaled from a topographic map and have JV3949.an estimated accuracy of +/- 6 seconds. JV3949 JV3949.The orthometric height was determined by differential leveling JV3949.and adjusted by the National Geodetic Survey in June 1991. JV3949 JV3949.The geoid height was determined by GEOID03. JV3949 JV3949.The dynamic height is computed by dividing the NAVD 88 JV3949.geopotential number by the normal gravity value computed on the JV3949.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 JV3949.degrees latitude (g = 980.6199 gals.). JV3949 JV3949.The modeled gravity was interpolated from observed gravity values. JV3949 JV3949; North East Units Estimated Accuracy JV3949;SPC MD - 204,230. 337,380. MT (+/- 180 meters Scaled) JV3949 JV3949 SUPERSEDED SURVEY CONTROL JV3949 JV3949.No superseded survey control is available for this station. JV3949 JV3949_U.S. NATIONAL GRID SPATIAL ADDRESS: 18STJ654762(NAD 83) JV3949_MARKER: DB = BENCH MARK DISK JV3949_SETTING: 66 = SET IN ROCK OUTCROP JV3949_SP_SET: ROCK OUTCROP JV3949_STAMPING: R 146 1979 JV3949_STABILITY: A = MOST RELIABLE AND EXPECTED TO HOLD JV3949+STABILITY: POSITION/ELEVATION WELL JV3949_SATELLITE: THE SITE LOCATION WAS REPORTED AS NOT SUITABLE FOR JV3949+SATELLITE: SATELLITE OBSERVATIONS - March 31, 2005 JV3949 JV3949 HISTORY - Date Condition Report By JV3949 HISTORY - 1979 MONUMENTED NGS JV3949 HISTORY - 20050331 GOOD DEWDAV JV3949 JV3949 STATION DESCRIPTION JV3949 JV3949'DESCRIBED BY NATIONAL GEODETIC SURVEY 1979 JV3949'2.75 MI NW FROM KEEDYSVILLE. JV3949'0.5 MILE SOUTH ALONG SOUTH MAIN STREET FROM THE POST OFFICE IN JV3949'KEEDYSVILLE, THENCE 2.25 MILES NORTHWEST ALONG KEEDYSVILLE ROAD TO THE JV3949'MARK ON THE RIGHT, 180 FEET NORTHEAST AND ACROSS THE ROAD FROM POWER JV3949'POLE NUMBER 53, 122 FEET NORTHWEST AND ACROSS THE ROAD FROM POWER POLE JV3949'NUMBER 52, 14.5 FEET NORTH OF THE CENTER LINE OF THE ROAD AND JV3949'8.5 FEET SOUTH OF A FENCE RUNNING EAST AND WEST. JV3949'THE MARK IS 1 FT SE FROM A WITNESS POST. JV3949'THE MARK IS 2 FT ABOVE ROAD. JV3949 JV3949 STATION RECOVERY (2005) JV3949 JV3949'RECOVERY NOTE BY DEWBERRY DAVIS 2005 (KEC) JV3949'RECOVERED IN GOOD CONDITION. 1 National Geodetic Survey, Retrieval Date = MAY 3, 2005 JW0006 *********************************************************************** JW0006 DESIGNATION - S 42 RESET JW0006 PID - JW0006 JW0006 STATE/COUNTY- MD/WASHINGTON JW0006 USGS QUAD - CHERRY RUN (1984) JW0006 JW0006 *CURRENT SURVEY CONTROL JW0006 ___________________________________________________________________ JW0006* NAD 83(1986)- 39 39 21. (N) 078 03 13. (W) SCALED JW0006* NAVD 88 - 129.10 (meters) 423.6 (feet) RESET JW0006 ___________________________________________________________________ JW0006 GEOID HEIGHT- -34.18 (meters) GEOID03 JW0006 JW0006 VERT ORDER - THIRD JW0006 JW0006.The horizontal coordinates were scaled from a topographic map and have JW0006.an estimated accuracy of +/- 6 seconds. JW0006 JW0006.The orthometric height was computed from unverified reset data. JW0006 JW0006.The geoid height was determined by GEOID03. JW0006 JW0006; North East Units Estimated Accuracy JW0006;SPC MD - 221,340. 309,580. MT (+/- 180 meters Scaled) JW0006 JW0006 SUPERSEDED SURVEY CONTROL JW0006 JW0006 NGVD 29 (??/??/??) 129.30 (m) 424.2 (f) RESET 3 JW0006 JW0006.Superseded values are not recommended for survey control. JW0006.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. JW0006.See file dsdata.txt to determine how the superseded data were derived. JW0006 JW0006_U.S. NATIONAL GRID SPATIAL ADDRESS: 17SQD527937(NAD 83) JW0006_MARKER: DD = SURVEY DISK JW0006_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT JW0006_SP_SET: SET IN TOP OF CONCRETE MONUMENT JW0006_STAMPING: S 42 RESET 1963 JW0006_MARK LOGO: CGS JW0006_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO JW0006+STABILITY: SURFACE MOTION JW0006_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR JW0006+SATELLITE: SATELLITE OBSERVATIONS - February 19, 2005 JW0006 JW0006 HISTORY - Date Condition Report By JW0006 HISTORY - 1963 MONUMENTED MDDT JW0006 HISTORY - 20050219 GOOD GEOCAC JW0006 JW0006 STATION DESCRIPTION JW0006 JW0006'DESCRIBED BY MARYLAND DEPARTMENT OF TRANSPORTATION 1963 JW0006'7.8 MI SE FROM HANCOCK. JW0006'2.8 MILES EAST ALONG MAIN STREET AND I-70 TO MARYLAND ROUTE JW0006'615 IN HANCOCK, MARYLAND, THENCE CONTINUE STRAIGHT AHEAD FOR JW0006'5.0 MILES ALONG I-70 TO PECKTONVILLE ROAD ON THE LEFT AND THE JW0006'STATION ON THE RIGHT, AS DESCRIBED, 4.7 MILES SOUTH OF THE JW0006'MARYLAND-PENNSYLVANIA LINE, APPROXIMATELY 200 FEET SOUTH OF THE JW0006'CENTERLINE OF I-70 EASTBOUND LANE, APPROXIMATELY 475 FEET JW0006'EAST OF THE PROJECT CENTERLINE OF PECKTONVILLE ROAD, 15.0 FEET JW0006'WEST OF WEST EDGE OF A CEMETERY, APPROXIMATELY 175 FEET NORTHWEST JW0006'OF AN INLET, AND SET IN THE TOP OF A CONCRETE POST PROJECTING JW0006'4 INCHES. JW0006 JW0006 STATION RECOVERY (2005) JW0006 JW0006'RECOVERY NOTE BY GEOCACHING 2005 (KAG) JW0006'RECOVERED IN GOOD CONDITION. 1 National Geodetic Survey, Retrieval Date = MAY 3, 2005 JV7254 *********************************************************************** JV7254 DESIGNATION - WHITE JV7254 PID - JV7254 JV7254 STATE/COUNTY- MD/WASHINGTON JV7254 USGS QUAD - HARPERS FERRY (1988) JV7254 JV7254 *CURRENT SURVEY CONTROL JV7254 ___________________________________________________________________ JV7254* NAD 83(1991)- 39 19 55.77182(N) 077 41 20.37694(W) ADJUSTED JV7254* NAVD 88 - 128.5 (meters) 422. (feet) GPS OBS JV7254 ___________________________________________________________________ JV7254 X - 1,053,321.017 (meters) COMP JV7254 Y - -4,826,511.701 (meters) COMP JV7254 Z - 4,020,967.871 (meters) COMP JV7254 LAPLACE CORR- 6.32 (seconds) DEFLEC99 JV7254 ELLIP HEIGHT- 95.26 (meters) (08/30/02) GPS OBS JV7254 GEOID HEIGHT- -33.30 (meters) GEOID03 JV7254 JV7254 HORZ ORDER - FIRST JV7254 ELLP ORDER - FOURTH CLASS II JV7254 JV7254.The horizontal coordinates were established by GPS observations JV7254.and adjusted by the National Geodetic Survey in February 1994. JV7254 JV7254.The orthometric height was determined by GPS observations and a JV7254.high-resolution geoid model. JV7254 JV7254.The X, Y, and Z were computed from the position and the ellipsoidal ht. JV7254 JV7254.The Laplace correction was computed from DEFLEC99 derived deflections. JV7254 JV7254.The ellipsoidal height was determined by GPS observations JV7254.and is referenced to NAD 83. JV7254 JV7254.The geoid height was determined by GEOID03. JV7254 JV7254; North East Units Scale Factor Converg. JV7254;SPC MD - 185,104.881 340,596.688 MT 0.99998151 -0 25 56.8 JV7254;SPC MD - 607,298.26 1,117,440.97 sFT 0.99998151 -0 25 56.8 JV7254;UTM 18 - 4,357,086.170 268,231.013 MT 1.00026144 -1 42 18.3 JV7254 JV7254! - Elev Factor x Scale Factor = Combined Factor JV7254!SPC MD - 0.99998505 x 0.99998151 = 0.99996657 JV7254!UTM 18 - 0.99998505 x 1.00026144 = 1.00024649 JV7254 JV7254 SUPERSEDED SURVEY CONTROL JV7254 JV7254 ELLIP H (02/09/94) 95.17 (m) GP( ) 4 1 JV7254 JV7254.Superseded values are not recommended for survey control. JV7254.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. JV7254.See file dsdata.txt to determine how the superseded data were derived. JV7254 JV7254_U.S. NATIONAL GRID SPATIAL ADDRESS: 18STJ6823157086(NAD 83) JV7254_MARKER: DD = SURVEY DISK JV7254_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT JV7254_SP_SET: CONCRETE POST JV7254_STAMPING: WHITE 1993 JV7254_MARK LOGO: MD-021 JV7254_MAGNETIC: N = NO MAGNETIC MATERIAL JV7254_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO JV7254+STABILITY: SURFACE MOTION JV7254_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR JV7254+SATELLITE: SATELLITE OBSERVATIONS - 1993 JV7254 JV7254 HISTORY - Date Condition Report By JV7254 HISTORY - 1993 MONUMENTED GREOMA JV7254 HISTORY - 19990410 GOOD GEOMET JV7254 HISTORY - 20040821 GOOD GEOCAC JV7254 JV7254 STATION DESCRIPTION JV7254 JV7254'DESCRIBED BY GREENHORNE-OMARA 1993 JV7254'STATION IS LOCATED AT THE INTERSECTION OF MD RTE 340 AND MD RTE 67 JV7254'WEST OF KNOXVILLE, MD. TO REACH THE STATION TAKE RTE 340 WEST FROM JV7254'KNOXVILLE AND TAKE THE RTE 67EXIT. STATION IS LOCATED ON THE BRIDGE JV7254'OVERPASS 23 FEET (7.0 M) SOUTHEAST OF THE CENTERLINE OF RTE 67 AND JV7254'115.5 FEET (35.2 M) SOUTHWEST OF THE END OF A GUARDRAIL AT THE JV7254'SOUTHWEST CORNER OF THE RTE 67 BRIDGE OVER RTE 340. STATION IS A JV7254'BRASS DISK SET IN THE TOP OF AN 8 INCH ROUND CONCRETE MONUMENT SET JV7254'FLUSH WITH THE GROUND. JV7254 JV7254 STATION RECOVERY (1999) JV7254 JV7254'RECOVERY NOTE BY GEOMETRICS GPS INCORPORATED 1999 (BB) JV7254'RECOVERED AS DESCRIBED. JV7254 JV7254 STATION RECOVERY (2004) JV7254 JV7254'RECOVERY NOTE BY GEOCACHING 2004 (TAK) JV7254'RECOVERED IN GOOD CONDITION.