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Details for Benchmark: JV4628

N 39° 20.463 W 077° 42.984 (NAD 83)

Altitude: 1456

Coordinates may not be exact. Altitude is VERTCON and location is ADJUSTED. (more info)

Location:
In WASHINGTON county, MD View Original Datasheet
Designation:
MARYLAND HEIGHTS RESET
Marker Type:
chiseled cross
Setting:
in a boulder
Stability:

Reference Points

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Found Ref Mark #1 in good condition while hiking up to the top.

[Photos:]
photoBenchmark Maryland Heights 1
photoBenchmark Maryland Heights 1

Discovered today on a beautiful hike around the mountain. Benchmark still in (fairly) good shape.

Found it while waymarking in the area.

[Photos:]
photoJV4628

Saw this while hiking up here

Located the triangulation station (JV4628), Reference Mark 1, Reference Mark 3, and Reference Mark 4. Those are all in very good condition. I also looked for a few of the chisel marks, but I did not see any of them.

caching and benchmark hunting with dukemartin and paintedwarrior.

Found it with Dukemartin.

Found the station in good condition at N39 20.463 W077 42.984 with 8' accuracy.
Found Ref Mark #1 in good condition at N39 20.464 W077 42.983 with 8' accuracy.
Found Ref Mark #3 in good condition at N39 20.463 W077 42.982 with 8' accuracy.
Found Ref Mark #4 in good condition at N39 20.453 W077 42.989 with 8' accuracy.

[Photos:]
photoStation Location
photoStation Closeup
photoRef #1 Location
photoRef #1 Closeup
photoRef #3 Location
photoRef #3 Closeup
photoRef #4 Location
photoRef #4 Closeup

We spent a long while getting to and searching for these. Found along with RM 1,3,4 and cross (we think).

Recovered in good condition along w/ RM1, RM3, & RM4 - did not search for AZ. Attempted unsuccessfuly to locate the 5 references from 1871 description - did locate cross found by BDT..

[Photos:]
photoMARYLAND HEIGHTS RESET (JV4628) disk
photoMARYLAND HEIGHTS RESET (JV4628) area - looking S
photoMARYLAND HEIGHTS RESET (JV4628) RM 1 disk
photoMARYLAND HEIGHTS RESET (JV4628) RM 1 area
..looking S
photoMARYLAND HEIGHTS RESET (JV4628) RM 3 disk
photoMARYLAND HEIGHTS RESET (JV4628) RM 3 area
..looking W toward main station
photoMARYLAND HEIGHTS RESET (JV4628) RM 4 disk
photoMARYLAND HEIGHTS RESET (JV4628) RM 4 area
..looking N toward main station

Coordinates within 2'. Beautiful hike. Thanks

This mark is now a USCGS disc, the coordinates were within 12' and the reference marks were easily found. The disc was hidden under some foilage and leaf debris. One of the finest hikes to a benchmark that you'll experience. Thanks, Fort Rectus

This mark was found.

From the intersection of Keep Tryst Road and Sandy Hook Road, take Sandy Hook Road West for 2.1 miles. Park and walk up the fire road. At 39 19.670 / 077 43.493, leave the fire road to take the trail NNW to the top of the ridge and then NNW along the ridge to the station on the left edge of the trail. The mark is 9 feet 10 inches NW of an 8 inch black cherry tree.

Reference marks 1 and 3 were also found. Reference mark 4 was not found. An old reference mark carved in rock was found. The azimuth mark was not searched.

[Photos:]
photoAt MARYLAND HEIGHTS RESET in Washington Cty MD
The station's position is shown by the red triangle in front of the black pack. Reference Mark #1's position is indicated by the yellow triangle next to the bent Ailanthus tree.
photoMARYLAND HEIGHTS RESET in Washington Cty MD
The disk, with a metallic green beetle that landed on it.
photoAt MARYLAND HEIGHTS RESET in Washington Cty MD
Reference Mark 1
photoAt MARYLAND HEIGHTS RESET in Washington Cty MD
Reference Mark 3
photoAt MARYLAND HEIGHTS RESET in Washington Cty MD
An old reference mark from 1887. If you sit at Reference Mark 3, facing the main station, look to the left down on the ground and you will see this old mark.

Buffy the Lab and I hiked to top as I have done several times. Located the benchmark by accident. It is in good condition. Great day for a hike and a lovely spot to hike in.

Documented History (by the NGS)

01/01/1957 by CGS (MONUMENTED)
01/01/1887 by CGS (SEE DESCRIPTION)
DESCRIBED BY COAST AND GEODETIC SURVEY 1887 ON THE WELL-KNOWN MOUNTAIN OF MARYLAND HEIGHTS, ACROSS THE POTOMAC RIVER FROM AND OVERLOOKING HARPERS FERRY, AND JUST S OF THE STONE FORT, AND ON LAND OWNED (IN 1869) BY JAMES GROVES, OF SHARPSBURG, MD. THE STATION WAS MARKED AS FOLLOWS--UNDERGROUND MARK IS A CROSS CUT IN THE HEAD OF A COPPER BOLT SET IN A LARGE ROCK 2 FEET BELOW THE SURFACE OF THE GROUND. THE FACE OF THIS ROCK HAS A DIP OF ABOUT 45 DEG, BUT A SMALL SHELF WAS CUT INTO IT AT THE STATION, IN WHICH THE HOLE TO RECEIVE THE BOLT WAS DRILLED 3/4 INCH IN DIAMETER AND 1-3/4 INCHES DEEP. A STONE POST 2 FEET LONG WAS PLACED UPON THIS SHELF AND THE CENTER MARKED ON THIS POST BY THE INTERSECTION OF TWO DEEPLY CUT DIAGONAL LINES. THESE LINES RUN N AND S AND E AND W. THE EXTREME SOUTHERN CORNER OF THE OLD STONE FORT IS 18.20 METERS (59.7 FEET) NW OF THE STATION, THE FIRST EXTERIOR ANGLE OF THE S WALL TO THE W OF THIS CORNER IS 9.88 METERS (32.41 FEET) A LITTLE W OF N FROM THE STATION, AND THE SECOND EXTERIOR ANGLE OF THE S WALL FROM THE S CORNER IS 15.15 METERS (49.7 FEET) NW FROM THE STATION. IN 1871 FIVE REFERENCE MARKS WERE ESTABLISHED BY CUTTING FIVE SQUARES UPON ROCKS NEAR THE STATION. EACH SQUARE WAS 6 INCHES ON A SIDE, WITH ITS DIAGONALS IN LINE WITH THE STATION AND AT RIGHT ANGLES TO THAT DIRECTION. AN ARROW POINTS FROM THE CENTER OF EACH SQUARE TOWARD THE STATION. THESE MARKS ARE AT THE FOLLOWING DISTANCES AND BEARINGS FROM THE STATION--7.26 METERS (23.82 FEET), N 83 DEG 46 MIN W. 8.53 METERS (27.99 FEET), N 18 DEG 30 MIN W. 11.17 METERS (36.6 FEET), N 51 DEG 39 MIN E. 18.25 METERS (59.9 FEET), N 89 DEG 46 MIN E. 10.16 METERS (33.3 FEET), S 19 DEG 11 MIN E.
01/01/1927 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1927 (WM) FOUND AS DESCRIBED EXCEPT THAT SURFACE MARK HAS DISAPPEARED, AND THE DISTANCES TO REFERENCE MARKS REFERRED TO IN METERS, MEANS IN FEET. NEW STATION MARK ESTABLISHED OVER OLD SUB-SURFACE MARK AND TWO STANDARD REFERENCE MARKS PLACED ON LOCATION MARK BY ARROWS. HEIGHT OF LOW STAND USED AUGUST 5-11 = 4.36 FEET. HEIGHT OF HIGH STAND USED AUGUST 12 AND AFTER = 23.67 FEET. MR. JAMES M. RANSON, HARPERS FERRY, W.VA., REPORTED ON APRIL 16, 1932 THAT REFERENCE MARK NO.1 HAD BEEN DESTROYED. THE BRONZE DISK WHICH WAS FORWARDED TO THE OFFICE BY HIM RECEIVED MAY 31, 1932.
01/01/1933 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1933 (MAH) THE STATION WAS RECOVERED AS DESCRIBED BY WILLIAM MUSSETTER IN 1927. THE BRONZE DISK MARKING REFERENCE MARK NO.1 HAD BEEN DESTROYED BUT THE OLD DRILL HOLE WAS RECOVERED. A STANDARD DISK WAS RESET IN THIS OLD DRILL HOLE. TO REACH THE STATION FROM THE POST OFFICE IN HARPERS FERRY--GO 1.4 MILES NE ON U.S. HIGHWAY 340 AND TURN LEFT ON AN ASPHALT ROAD JUST BEFORE REACHING A STONE BRIDGE. CONTINUE 0.55 MILES AND TURN LEFT ON TO A DIRT ROAD. PROCEED 0.5 MILE AND TURN LEFT. CONTINUE 0.2 MILE TO THE END OF TRUCK TRAVEL. FROM HERE TAKE TRAIL UP MOUNTAIN, BEARING RIGHT, TO THE TOP OF THE RIDGE. TURN RIGHT AND FOLLOW ALONG THE TOP OF THE RIDGE TO AN OLD FORT. STATION IS JUST S OF THE OLD FORT. TOTAL CLIMB - 1-3/4 MILES.
01/01/1939 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1939 (APR) STATION RECOVERED IN GOOD CONDITION. IT IS ON THE TOP OF A BRUSH AND TIMBER COVERED MOUNTAIN LOCALLY KNOWN AS MARYLAND HEIGHTS, ACROSS THE POTOMAC RIVER FROM AND OVERLOOKING HARPERS FERRY. IT IS ABOUT 30 FEET S OF THE S WALL OF AN OLD STONE FORT. NONE OF THE REFERENCES ON THIS OLD FORT COULD BE RECOVERED AS THE WALLS HAVE FALLEN DOWN AND TREES GROWN UP THROUGH THEM. THE REMAINS OF THE FORT CANNOT BE SEEN FROM A DISTANCE OF MORE THAN 20 OR 30 FEET. THE UNDERGROUND MARK IS A CROSS CUT IN THE TOP OF A COPPER BOLT SET IN BEDROCK ABOUT 2 FEET BELOW THE SURFACE. THE SURFACE MARK PROJECTS ABOUT 2 INCHES AND IS STAMPED MARYLAND HEIGHTS, 1927 1933. REFERENCE MARK NO.1 3.400 METERS, STAMPED MARYLAND HEIGHTS 1927. REFERENCE MARK NO.2 5.570 METERS, STAMPED MARYLAND HEIGHTS 1927. AZIMUTH IS ABOUT 0.7 MILE E OF THE STATION, 30 FEET N OF A POWER AND LIGHT POLE NO.14984. 1 FOOT NW OF W RIGHT-OF-WAY FENCE. 13 FEET W OF THE CENTER OF A NARROW PAVED ROAD AND 125 FEET NE OF AN ENTRANCE TO A FARM LANE. REACHED FROM THE INTERSECTION OF U.S. HIGHWAYS 15, 40 AND 340 IN FREDERICK BY GOING SW ON U.S. HIGHWAY 340, 15.8 MILES TO KNOXVILLE. THENCE CONTINUE ON U.S. HIGHWAY 340 FOR 2.1 MILES TO THE POTOMAC VIEW ROADHOUSE ON THE LEFT. THENCE CONTINUE STRAIGHT AHEAD 0.25 MILE TO A NARROW PAVED ROAD TO THE RIGHT. THENCE LEAVE U.S. HIGHWAY 340, TURN RIGHT AND GO NORTHERLY ON NARROW PAVED ROAD UP CANYON FOR 0.55 MILE TO A DIRT ROAD TO THE LEFT. THENCE LEFT, (W), TOWARDS MOUNTAIN FOR 0.45 MILE TO A T-ROAD, THEN LEFT, (S), FOR 0.1 MILE TO END OF TRUCK TRAVEL WHERE A DIM TRAIL LEADS OFF TO THE RIGHT JUST S OF A FENCE CORNER. FROM HERE FOLLOW TRAIL TO THE W A SHORT DISTANCE TO CROSS TRAILS, THEN A SHORT DISTANCE FURTHER TO A FORK. THENCE RIGHT FORK AND FOLLOW DIM TRAIL UP THROUGH THE WOODS ON WHAT WAS APPARENTLY AN OLD ROAD BED TO A DIM ROCK WALL RUNNING LEFT UP THE MOUNTAIN, THEN LEFT ALONG THE WALL TO TOP OF RIDGE AND STATION. DISTANCE AND DIRECTIONS TO REFERENCE MARKS CHECKED. AN AZIMUTH MARK WAS ESTABLISHED. MARYLAND HEIGHTS (S) NOT SEARCHED FOR AS IT REQUIRED EXTENSIVE CLEARING.
01/01/1942 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1942 (PLB) STATION AND REFERENCE MARKS RECOVERED AND FOUND IN GOOD CONDITION. FOLLOWING IS A NEW DESCRIPTION-- STATION IS ABOUT 3 MILES W OF BRUNSWICK, 1.5 MILES WSW OF KNOXVILLE, AND 0.8 MILE NNW OF HARPERS FERRY, ON THE N END OF A BRUSH AND TIMBER-COVERED MOUNTAIN LOCALLY KNOWN AS MARYLAND HEIGHTS. THE DISK IS SET IN BEDROCK ABOUT 1 BY 2 FEET IN DIAMETER, PROJECTS 2 INCHES, AND IS STAMPED MARYLAND HEIGHTS. 1927-1933. REFERENCE MARK 1 IS N OF THE STATION, SET IN OUTCROPPING BEDROCK. IT IS STAMPED MARYLAND HEIGHTS 1927 AND PROJECTS ABOUT 8 IN. REFERENCE MARK 2 IS NE OF THE STATION, SET IN BEDROCK. IT IS STAMPED MARYLAND HEIGHTS NO 2 1927 AND PROJECTS ABOUT 18 IN. AZIMUTH MARK IS ABOUT 0.7 MI. E OF THE STATION, 30 FT. N OF POWER AND LIGHT POLE NO. 14984, 13 FT. W OF THE CENTER OF THE NARROW MACADAM ROAD, AND 125 FT. NE OF A FARM LANE. DISK IS STAMPED MARYLAND HEIGHTS 1939 AND PROJECTS 3 IN. TO REACH AT THE END OF THE 0.55 MI. FROM U.S. HIGHWAY 340, CONTINUE N ON A NARROW PAVED ROAD FOR 0.05 MI. TO THE MARK ON THE LEFT. TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 340 AND STATE ROUTE 17 IN KNOXVILLE, GO S ON HIGHWAY 340 FOR 2.35 MI. TO A MACADAM ROAD RIGHT JUST AFTER CROSSING A CONCRETE BRIDGE, TURN SHARP RIGHT AND GO N ON THE MACADAM ROAD FOR 0.55 MI. TO A DIRT ROAD LEFT, TURN LEFT AND GO W ON THE DIRT ROAD FOR 0.45 MI. TO A T-INTERSECTION, TURN LEFT AND GO S ON A WOODS ROAD FOR 0.1 MI. TO THE END OF TRUCK TRAVEL WHERE A DIM TRAIL LEADS OFF TO THE RIGHT, FROM THIS POINT PACK W AND NW ON A BLAZED TRAIL TO THE TOP OF THE RIDGE AND STATION ON THE HIGHEST POINT, PACK WILL REQUIRE ABOUT ONE HOUR. A 26-FT. WOOD TOWER REQUIRED TO CLEAR ALL LINES.
01/01/1950 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1950 (HHH) I WAS UNABLE TO FOLLOW THE DIRECTIONS FOR REACHING STATION. THE PATHS HAVE APPARENTLY BEEN CHANGED. ACTUALLY, I GOT THERE BY WALKING STRAIGHT UP THE SIDE OF THE MOUNTAIN. IT WAS EASY TO FIND THE STATION, BECAUSE THE OLD TRIANGULATION TOWER WAS STILL STANDING. CONTRARY TO THE U.S.E. QUAD, STATION IS NOT ON THE S-MOST PEAK OF THE MOUNTAIN, ANOTHER OF ABOUT THE SAME HEIGHT IS TO THE S, WITH A SHALLOW PASS IN BETWEEN. SPEEDOMETER DISTANCES WERE REMEASURED. A NEW DESCRIPTION (BASED ON A PATH USED IN RETURNING) FOLLOWS-- STATION IS ON TOP OF A MOUNTAIN ACROSS POTOMAC RIVER FROM HARPERS FERRY (ON THE U.S.E. QUAD THE MOUNTAIN IS KNOWN AS ELK RIDGE). FOLLOW U.S. HIGHWAY 340 TO A POINT 1.3 MI. W OF THE HIGHWAY JUNCTION IN WEVERTON, OR 0.25 MI. NE OF THE NE END OF THE NEW BRIDGE FROM MARYLAND TO VIRGINIA. HERE TURN N ONTO A NARROW HARD-SURFACED ROAD, FOLLOW THE ROAD N FOR 0.6 MI. TURN W ONTO A NARROW DIRT ROAD (IT SOON BECOMES ROUGH AND ROCKY), FOLLOW THE ROAD W FOR 0.5 MI. TO A T-JUNCTION (IN 1950, BEST WAY WAS TO LEAVE CAR HERE), AND GO N FOR A 1/4 MI. TO A SAWMILL. GO W TO THE TOP OF THE MOUNTAIN (FOLLOWING A TRAIL USED TO HAUL LOGS). GO S ALONG CREST FOR ABOUT 1/4 MI. (PAST EARTHWORKS, PITS AND TRENCHES) TO THE RUINS OF THE MASSIVE STONE WALLS OF AN OLD FORT (PERHAPS 200 FT. NS AND 100 FT. EW) OVERLOOKING THE E SLOPE OF THE MOUNTAIN. STATION IS ABOUT 50 FT. S OF THE S END OF THE FORT. STATION AND REFERENCE MARKS 1 AND 2 WERE FOUND. DISTANCES NOT CHECKED. STAMPED AS DESCRIBED. DESCRIPTION OF THE AZIMUTH MARK WAS INADEQUATE. A NEW DESCRIPTION FOLLOWS-- LEAVE U.S. HIGHWAY 340 AT THE POINT DESCRIBED ABOVE. TRAVEL N ON A HARD-SURFACED ROAD FOR 0.45 MI. STATION IS 1 FT. W OF A LINE OF POSTS MARKING W EDGE OF A RIGHT-OF-WAY, AT A POINT 125 FT. N OF THE FARM LANE THAT IS IDENTIFIED BY A SMALL STONE-BUILDING, NEAR THE ROAD IN FRONT OF A HOUSE.
01/01/1957 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1957 (FAR) THE STATION-MARK DRILL HOLE WAS RECOVERED, AND REFERENCE MARK 1 WAS FOUND TO BE IN FAIR CONDITION. REFERENCE MARK 2 AND THE AZIMUTH MARK WERE FOUND TO BE DESTROYED. A NEW STATION MARK WAS SET IN THE OLD DRILL HOLE, THUS REMAKING THE CENTER OF THE STATION. A NEW REFERENCE MARK 3 WAS SET IN THE OLD DRILL HOLE WHICH WAS REFERENCE MARK 2, AND A NEW REFERENCE MARK 4 AND AN AZIMUTH MARK WERE SET. A COMPLETE NEW DESCRIPTION FOLLOWS-- THE STATION IS ABOUT 3 MI. W OF BRUNSWICK, 1-1/2 MI. W-SW OF KNOXVILLE, AND 3/4 MI. N-NW OF HARPERS FERRY (OVERLOOKING THE POTOMAC RIVER TO THE S), ON THE N END OF A TIMBER-COVERED HILL (LOCALLY KNOWN AS MARYLAND HEIGHTS), AND IS ON THE PROPERTY OF MR. JAMES H. SMITH. TO REACH THE STATION THE N END OF THE BRIDGE OVER THE POTOMAC RIVER, GO N ON U.S. HIGHWAY 340 FOR 0.25 MI. TO SANDY HOOK ROAD ON THE LEFT. TURN LEFT AND GO NW (UP A CANYON) FOR 0.4 MI. TO BROWN ROAD. CONTINUE STRAIGHT AHEAD FOR 0.2 MI. TO A SIDE ROAD LEFT, JUST BEFORE REACHING A TWO-STORY STONE HOUSE. (*) TURN LEFT AND FOLLOW THE DIRT ROAD THROUGH WOODS FOR 0.5 MI. TO A T-ROAD JUNCTION AND THE END OF TRUCK TRAVEL. PACK DUE W ON A BLAZED TRAIL TO THE SUMMIT OF THE STATION. (*) TO REACH THE AZIMUTH MARK, CONTINUE STRAIGHT AHEAD FOR 0.05 MI. TO A FIELD ENTRANCE ON THE RIGHT, JUST OPPOSITE A RED BARN. TURN RIGHT AND GO E ALONG THE N SIDE OF A FENCE FOR 0.1 MI. TO THE GATE ON THE RIGHT. PASS THROUGH THE GATE AND CONTINUE E ALONG THE S SIDE OF A FENCE FOR 0.15 MI. TO THE AZIMUTH MARK. STATION MARK IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS 1869 1957, CEMENTED IN A DRILL HOLE IN A BOULDER ABOUT 1- BY 2-FT. PROJECTING ABOUT 4 IN. IT IS 10 FT. S-SE OF A TRIANGULAR BLAZE ON AN APPLE TREE. THE ORIGINAL DESCRIPTION STATES THAT THE UNDERGROUND MARK IS A CROSS CUT IN THE HEAD OF A COPPER BOLT AND SET IN A LARGE ROCK 2 FT. BELOW THE SURFACE OF THE GROUND. REFERENCE MARK 1 IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS NO 1 1927, CEMENTED IN A DRILL HOLE IN A BOULDER 3- BY 3-FT. PROJECTING 2 FT. ON THE E SIDE. REFERENCE MARK 3 IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS NO 3 1869 1957, CEMENTED IN A DRILL HOLE IN A BOULDER PROJECTING ABOUT 14 IN. ON THE W SIDE. REFERENCE MARK 4 IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS NO 4 1869 1957, CEMENTED IN A DRILL HOLE IN A BOULDER ABOUT 16 IN. IN DIAMETER PROJECTING 4 IN. THE AZIMUTH MARK IS A STANDARD DISK, STAMPED MARYLAND HEIGHTS 1957, IS SET IN A SQUARE CONCRETE POST PROJECTING 4 IN. IT IS 21 FT. S OF A T-JUNCTION OF A RAIL FENCE WITH A WOVEN-WIRE FENCE, AND 1 FT. W OF THE WOVEN-WIRE FENCE. A STANDARD WITNESS POST WAS SET 2 FT. N-NE OF THE MARK. 1957 OBSERVATIONS TAKEN FROM A 50-FT STEEL TOWER.
01/01/1958 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 (LFV) STATION, REFERENCE MARK NO. 1, NO. 3, AND NO. 4 RECOVERED IN GOOD CONDITION. AZIMUTH MARK NOT SEARCHED FOR. STATION NOT OCCUPIED BY THIS PARTY. DESCRIPTION BY FAR IN 1957 RECOVERY NOTE ADEQUATE AND CORRECT.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in November 1994.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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