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Details for Benchmark: HV4835

N 38° 57.532 W 077° 11.794 (NAD 83)

Altitude: 328

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

Location:
In FAIRFAX county, VA View Original Datasheet
Designation:
BURLING PB PP 1930
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

Reference Points

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N 38° 57.538 W 077° 11.790

Recent survey flags made this an easy find. Note: This station has also been painted white. Benchmark is at base of large tree, (as noted by Black Dog Trackers).

[Photos:]
photoCloseup of Benchmark

Found as described. From the parking area closest to the Beltway, proceed on foot through the gate approximately 0.19 miles. It is shortly after a secondary trail at an acute angle on the left and shortly before the main train (an unimproved road, really) veers off to the left, and about halfway between those two points. Turn right (approximately east) off the trail and go cross-country about 125-150 feet to the mark and associated reference marks (HV2288, HV2289).

There was recent flagging around the marks when I visited, so obviously this station (or its RMs) is in current use. The slight displacement of the station, apparently a result of the growth of the tree by which it was set, has no doubt reduced the value of this station, unless its position has been measured in its present condition.

I believe the mark is made of metal, not white plastic as stated by a previous logger. I suspect no plastic would be considered sufficient durable when this disk was placed in 1930. However, this disk (and RM1) are white in appearance, and likely this is an enamel coating of some kind.

Also, the white construction material referred to in the same log is, I believe, a target for aerial mapping purposes. It's hard to see in the patchy snow cover.

[Photos:]
photoCloseup, BURLING PB PP 1930 (HV4835), FairfaxCo,VA
photoArea, BURLING PB PP 1930 (HV4835), FairfaxCo,VA
Red arrow indicates location of disk at base of tree. Yellow arrow indicates one of two targets barely visible in the snow.
photoStation cluster BURLING, Fairfax Co., VA
View looking generally north showing relative position of this station and associated reference marks. Red arrow indicates station mark. Blue arrow indicates approximate location of RM1 (HV2288). Yellow arrow indicates location of RM1 (HV2289). Flagging is visible at all three disks.

Yup, found this at the same time as the other nearby Burling marker. Also well documented.

Found this station as described. For some reason I didn't notice this PID in the database at the time, so I'm loading it now a few months later.

A large tulip-poplar tree is slowly pushing the benchmark out of position.

[Photos:]
photoin Fairfax County, Virginia
The disk is made from some white plastic instead of brass.
photoin Fairfax County, Virginia
Station Burling is being slowly pushed out of position by this large tulip-poplar tree. The station was installed one foot from the tree when it was much younger. (Oooops - not a good idea.) At some point in the past, someone put some white construction material around Burling and Burling reference mark 1, and 2 ends of it frame the station.

Documented History (by the NGS)

01/01/1930 by PBPP (MONUMENTED)
DESCRIBED BY PUB BLDGS AND PARKS 1930 STATION IS LOCATED ON A TIMBERED HILL ON THE ESTATE OF EDWARD BURLING, ON THE RIVER SIDE OF THE LANGLEY TO GREAT FALLS ROAD, VIRGINIA. THERE IS AN OLD LOGGING ROAD RUNNING FROM THE CLEARED FIELD IN THE REAR OF THE HOME OF E.B. JONES ONTO THE HILL ON WHICH THE STATION IS LOCATED. THE STATION IS JUST A LITTLE W OF N FROM JONES HOUSE, WHICH IS A LARGE BRICK HOUSE ON THE RIVER SIDE OF THE ROAD AT THE TOP OF A HILL JUST BEFORE REACHING THE TOLL GATE. STATION IS A STANDARD U.S.P.B. AND P.P. TRIANGULATION MARK SET IN CONCRETE IN A 5-INCH IRON PIPE. UNDERGROUND MARKER CONSISTS OF A SOFT DRINK BOTTLE WITH TOP ABOUT 3 FEET 10 INCHES BELOW SURFACE OF GROUND.
01/01/1930 by PBPP (GOOD)
RECOVERY NOTE BY PUB BLDGS AND PARKS 1930 STATION LOCATED ON VIRGINIA SIDE OF POTOMAC RIVER, ON ESTATE OF HENRY BURLING, ON WOODED RIDGE, ABOUT 360 FEET ALONG CENTER LINE OF OLD LOGGING ROAD FROM WHERE ROAD ENTERS WOODS E AT BASE OF 30-INCH POPLAR FROM WHICH THE LIMBS HAVE BEEN CUT OFF. STATION CONSISTS OF STANDARD P.B. AND P.P. BRASS DISK SET IN 6-INCH TERRA COTTA PIPE, SURROUNDED BY CONCRETE. NO UNDERGROUND MARKER SET ON ACCOUNT OF ROOTS OF TREE AND A HOLE ABOUT 14 INCHES DEEP WAS DUG. TWO AZIMUTH MARKERS, STANDARD BRASS DISKS IN TERRA COTTA PIPE AND CAST IRON PIPE WERE SET ON JONES PROPERTY NEAR BASE OF CEDAR TREE AND ABOUT 4 INCHES BELOW THE SURFACE. ON GRAYSONS PROPERTY NEAR LINEHURST ROAD, ALONG FENCE LINE AND NEAR WHERE LOGGING ROAD LEAVES LINEHURST ROAD. ENTRANCE TO STATION ALONG GREAT FALLS ROAD TO OLD LINEHURST ROAD, THENCE ALONG LINEHURST ROAD ABOUT 750 FEET TO OLD LOGGING ROAD, THENCE ALONG OLD LOGGING ROAD INTO WOODS BEYOND JONES PROPERTY.
01/01/1931 by PBPP (GOOD)
RECOVERY NOTE BY PUB BLDGS AND PARKS 1931 ON ACCOUNT OF THE ROOTS OF A LARGE POPLAR TREE WHICH WAS ONLY 0.7 FOOT AWAY NO UNDERGROUND MARKER WAS PLACED AT THIS STATION, BUT TWO REFERENCE STATIONS WERE ESTABLISHED BOTH WITH UNDERGROUND MARKERS AND SURFACE MARKERS STAMPED REFERENCE STATIONS NOS. 1 AND 2. REFERENCE STATION NO. 1 IS N 49 DEG 03 MIN W 19.63 FEET FROM STATION BURLING AND CONSISTS OF A STANDARD DISK SET IN CONCRETE IN AN 8-INCH TERRA COTTA PIPE WITH A SOFT DRINK BOTTLE FOR THE SUBSURFACE MARK. REFERENCE STATION NO. 2 IS S 46 DEG 38 MIN W 22.75 FEET FROM STATION BURLING AND CONSISTS OF A BRONZE DISK SET IN A GRANITE STONE WITH A BRASS PLUG SET IN CONCRETE IN A PINE MILK BOTTLE.
01/01/1956 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1956 (MLC) THE STATION AND TWO REFERENCE STATIONS RECOVERED. THE STATION MARK, SET 0.7 FT. AWAY FROM THE LARGE POPLAR TREE MENTIONED IN THE 1931 RECOVERY NOTE, APPEARS TO BE DISTURBED BY GROWTH OF THE TREE. THE TWO REFERENCE STATIONS ARE IN GOOD CONDITION. NO OBSERVATIONS WERE MADE AT THE STATION. TO REACH THE STATION FROM THE JUNCTION OF BALLS HILL ROAD AND STATE HIGHWAY 193, GO W ON STATE HIGHWAY 193 FOR 0.15 MI. TO A LOCKED GATE ON THE RIGHT AT ENTRANCE TO THE BURLING PROPERTY. FROM THE GATE FOLLOW THE ROAD N FOR 0.15 MI. TO THE TOP OF A WOODED HILL AND STATION ON THE RIGHT ABOUT 150 FT. FROM ROAD.
01/01/1958 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 (JCE) STATION MARK APPEARS TO HAVE BEEN MOVED BY THE GROWTH OF A LARGE POPLAR TREE. REFERENCE MARKS 1 AND 2 WERE RECOVERED AS DESCRIBED AND FOUND IN GOOD CONDITION. THE 1930 MEASUREMENT OF THE ANGLE BETWEEN THE TRUE STATION AND REFERENCE MARK 2 (AT REFERENCE MARK 1) WAS 52 DEG 30 MIN 20 SEC. THIS ANGLE COULD NOT BE CHECKED BECAUSE OF THE MOVEMENT OF THE STATION MARK IN AN APPARENT S DIRECTION, BUT WAS APPROXIMATELY CORRECT AS OF 1958. STATION MARK WAS SOLID AND WAS USED AS A REFERENCE MARK FOR BURLING RM 1. NO OBSERVATIONS WERE MADE AT THIS STATION. TO REACH THE STATION FROM THE POST OFFICE IN MC LEAN, GO W-NW ON OLD DOMINION DRIVE FOR 1.05 MI. TO ANGLING CROSSROADS. TURN RIGHT AND GO N ON BALLS HILL ROAD FOR 0.95 MI. TO A T-JUNCTION. TURN LEFT AND GO W ON LEESBURG ROAD FOR 0.2 MI. TO A POLE GATE ON THE RIGHT (N) SIDE OF THE ROAD. TURN RIGHT AND GO N (THROUGH A GATE) AND CONTINUE N ON A DIRT ROAD FOR 0.2 MI. TO THE TOP OF A RIDGE. STATION IS ABOUT 150 FT. E OF THE ROAD IN A SMALL CLEARING.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in November 1994.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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