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Details for Benchmark: HV8759

N 38° 46.232 W 077° 24.431 (NAD 83)

Altitude: 286

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

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

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YATES AZ

Found today with the Cache Mob!

Another that gets fairly regular visits. Still here.

[Photos:]
photoHV8759

Found today with the cache mob.

On a hiking tour of the area, derektiffany pointed out this benchmark when we were near. As mentioned, the buses had relocated and the find was made. This is my first benchmark find.

Recovered in good condition.

Found as described. I was previously unable to find mark due to vehicles being parked on it. Today vehicles were parked elsewhere and mark was easily located.

[Photos:]
photoYATES AZ MK In FAIRFAX county, VA (overview)
photoYATES AZ MK In FAIRFAX county, VA (closeup)

Found area and location as previously described and photographed. Many vehicles parked in area, potentially covering the mark.

Finally got around to locating this one on a nice walk through the park. Pretty much as described

[Photos:]
photoMarker in Context
Right on the circle, in front of the big white dog...
photothe marker
Located & stamped as described

Only 100 yards from my desk at work! I have parked my car over this disc hundreds of times. The nearby Farmhouse is my office as Assistant Director of Hemlock Overlook Center for Outdoor Education (www.hemlockoverlook.org)

[Photos:]
photoIMG_0005.jpg

Documented History (by the NGS)

Unknown by (MONUMENTED)
01/01/1975 by VA-059 (GOOD)
DESCRIBED BY FAIRFAX COUNTY VIRGINIA 1975 (EYB) THE AZ MK AND PRIMARY STATION WERE FOUND IN GOOD CONDITION. SEE FAIRFAX COUNTY TAX MAP 85-1, REVISED TO 1-1-76.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)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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