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Details for Benchmark: JV1534

N 39° 43.167 W 076° 41.833 (NAD 83)

Altitude: 779.32

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

Location:
In BALTIMORE county, MD View Original Datasheet
Designation:
37 PRR
Marker Type:
bolt
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Found it under about an inch of decomposing leaves. The surface is stained almost black. Read seventhings' log for all the information you need to find the mark.

[Photos:]
photoBolt

Recovered in good condition as described. It would be interesting to learn the date that this was monumented. I believe this is my first copper bolt in Maryland.

[Photos:]
photoThe mark
Substantial copper bolt inside chiseled square.
photoArea of mark
Look for BM chiseled in stone.

Found and used while doing Land Surveying work in the area.

[Photos:]
photo37 PRR (JV1534)

Found and added an updated description to the NGS datasheet.

[Photos:]
photoMarker 37 PRR
Top view of marker
photoMarker and wall

Found with modification to the description. The bolt is located in the top of the second stone from the top of the northwest coping wall of the NCRR Trail bridge over Beetree Run, about 35 feet west of the centerline of the trail, two feet below the level of the trail surface, and at handheld coordinates N39-43.173 W076-41.849. To reach from the intersection of West Main Street and South Front Street in downtown New Freedom, PA, go south on South Front Street (aka New Freedom Road) for 0.88 miles to Singer Road, turn left and go northeast non Singer for 0.12 miles to Orwig Road, turn right and go southeast on Orwig for 0.45 miles and where Orwig crosses the NCRR Trail, pack south on the trail for 0.2 miles to the bridge and the mark on the right.

This is also the closest station to an original Mason-Dixon stone (USGS #51, no-PID). The MASDIX stone is located 0.25 miles northeast of JV1534, about 140 feet south of the centerline of Orwig Road, about 95 feet west of the west edge of Keeney Road, about 40 feet south of and ten feet lower than the centerline of an east-west berm along the south side of a catchment basin, about 70 feet west of the west end of the headwall for an outlet for the basin, about 90 feet west-southwest of the southwest corner of a small substation, and at handheld coordinates N39-43.266 W076-41.609. The stone is in good condition and projects about 14 inches. To reach from the point where Orwig Road crosses the NCRR Trail, go easterly on Orwig for about 0.28 miles, turn right on Keeney and go south for about 130 feet, and pack west for about 140 feet to the stone.
See the Waymark file at: http://www.waymarking.com/waymarks/WM196A

[This entry was edited by seventhings on Wednesday, September 19, 2007 at 1:36:46 PM.]

[Photos:]
photoJV1534 - the Mark
photoJV1534 in Baltimore Co., MD
Looking south, the mark is about 35 feet to the right of the white notebook on the right edge of the trail, center.
photoMASDIX USGS #51 (no-PID)
The M (south) face
photoMASDIX USGS #51 (no-PID), Baltimore Co., MD
Looking west, the stone is at center in the leaves.
N 39° 43.175 W 076° 41.848

A copper bolt in the stone of a bridge abutment on what is now the North Central Rail-Trail in the Freeland area of Baltimore County, Maryland. BM 37 is inscribed in the stone.

[last edit: 5/20/2002 8:28:53 AM PST]

[Photos:]
photoJV1534 (37 PRR)

Documented History (by the NGS)

Unknown by PRR (MONUMENTED)
01/01/1959 by CGS (GOOD)
DESCRIBED BY COAST AND GEODETIC SURVEY 1959 1.2 MI NW FROM FREELAND. 1.2 MILES NORTHWEST ALONG THE PENNSYLVANIA RAILROAD FROM THE STATION AND STATE HIGHWAY 409 ROAD CROSSING AT FREELAND, AT BRIDGE NO. 35.52 OVER BEETREE RUN, ON TOP OF THE NORTHWEST COPING OF THE BRIDGE, 32.4 FEET WEST OF THE WEST RAIL, 2 FEET BELOW THE LEVEL OF THE TRACK.
01/01/1961 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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