Unusual Survey Disk

[NGS Surveyor]

Here are links to photos of the front and back of a very unusual survey disk. Front: http://www.flickr.com/photos/12262796@N06/5263222063/

Rear: http://www.flickr.com/photos/12262796@N06/5263221811/

The front is stamped “U.S. COAST & GEODETIC SURVEY, TRIANGULATION STATION…” and the rear is stamped “U.S. GEOLOGICAL SURVEY, TRIANGULATION STATION…” I don’t know if this was a mistake, a shortage of brass, or something else.

 

GeorgeL

NGS

[Bill93]

The air hole would be a clue as to its age.

 

The USGS side stub of a stem looks brazed on? Can you see any signs of the expected triangle under the brazing to show that it was a complete surface originally?

[NGS Surveyor]

Right, disks with air holes were used by USC&GS from c1952 to c1969.

 

I looked at the back with a magnifying glass and could see no signs of a triangle.

 

GeorgeL

NGS

[Z15]

I personally recovered a disk like this back in the 80's. It was on USC&GS tri station set in 1954. Other side said USGS.

 

I screwed up and let one of our GPS Surveyors out of Lansing take it so I have no idea who has it now, him (JS), the NGS advisor listed in the rec notes (now retired for 10 yrs) or if its in the NGS/MDOT Survey Office in Lansing, MI.

 

This it the mark, we found it uprooted from the ground and Ramjet came up and reset it some years later.

 

QL0672_U.S. NATIONAL GRID SPATIAL ADDRESS: 16TDR4020569064(NAD 83)

QL0672_MARKER: DH = HORIZONTAL CONTROL DISK

QL0672_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT

QL0672_SP_SET: SQUARE CONCRETE MONUMENT

QL0672_STAMPING: LORETTA 1954 1984

QL0672_MARK LOGO: NGS

QL0672_PROJECTION: PROJECTING 3 CENTIMETERS

QL0672_MAGNETIC: N = NO MAGNETIC MATERIAL

QL0672_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL

QL0672_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR

QL0672+SATELLITE: SATELLITE OBSERVATIONS - May 30, 2001

QL0672

QL0672 HISTORY - Date Condition Report By

QL0672 HISTORY - 1984 MONUMENTED NGS

QL0672 HISTORY - 19840823 GOOD NGS

QL0672 HISTORY - 19840823 GOOD NGS

QL0672 HISTORY - 19920421 GOOD MIDT

QL0672 HISTORY - 20010331 GOOD NGS

QL0672 HISTORY - 20010530 GOOD UPENGN

QL0672 HISTORY - 20060904 GOOD GEOCAC

QL0672

QL0672 STATION DESCRIPTION

QL0672

QL0672'DESCRIBED BY NATIONAL GEODETIC SURVEY 1984

QL0672'STATION IS LOCATED IN QUAD. 450874, ABOUT 8.05 KM (5.00 MI) EAST OF

QL0672'VULCAN, ON A SMALL BARE HILL ALONG THE RIGHT-OF-WAY OF A GRAVEL ROAD.

QL0672'TO REACH FROM THE INTERSECTION OF U.S. HIGHWAY 2 AND THE MAIN STREET

QL0672'IN NORWAY WITH THE CAUTION LIGHT, GO EASTERLY ON U.S. HIGHWAY 2 FOR

QL0672'3.86 KM (2.40 MI) TO A CROSSROAD IN THE NORTH EDGE OF VULCAN.

QL0672'CONTINUE EAST ON HIGHWAY 2 FOR 7.56 KM (4.70 MI) TO A GRAVEL ROAD

QL0672'LEFT. TURN LEFT AND GO NORTH ON GRAVEL ROAD FOR 0.32 KM (0.20 MI) TO

QL0672'THE AZIMUTH MARK ON LEFT OR WEST SIDE OF GRAVEL ROAD AS DESCRIBED.

QL0672'CONTINUE NORTH FOR 0.24 KM (0.15 MI) TO TOP OF SMALL HILL AND

QL0672'STATION ON LEFT OR WEST SIDE OF ROAD AS DESCRIBED.

QL0672'STATION PROJECTS ABOUT 1 INCH. IT IS 10.363 M (33.999 FT) WEST FROM

QL0672'THE CENTER OF THE GRAVEL ROAD, 1.524 M (5.000 FT) EAST FROM A

QL0672'NORTH-SOUTH FENCE LINE AND 0.457 M (1.499 FT) EAST FROM A MWP.

QL0672'A TRAVERSE CONNECTION WAS MADE TO THE AZIMUTH MARK USING ELECTRONIC

QL0672'DISTANCE MEASURING EQUIPMENT.

QL0672'HEIGHT OF TARGET SHOWN ABOVE THE MARK WAS 1.5 METERS.

QL0672'RECOVERED BY RONALD L. RAMSEY, NGS GEODETIC ADVISOR-MICHIGAN.

QL0672

QL0672 STATION RECOVERY (1984)

QL0672

QL0672'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1984 (CLN)

QL0672'THE STATION MARK WAS FOUND WITH THE TOP PART OF MONUMENT BROKEN OFF

QL0672'AND LAYING ON ITS SIDE. REFERENCE MARKS 1 AND 2 AND THE AZIMUTH MARK

QL0672'WAS FOUND IN GOOD CONDITION. ALL MARK ARE NOW FLUSH WITH GROUND. THE

QL0672'UNDERGROUND STATION MARK WAS RECOVERED AND THIS POINT WAS HELD TO SET

QL0672'A NEW SURFACE DISK. THE DIRECTION FROM THE AZIMUTH MARK TO REFERENCE

QL0672'MARK 2 CHECKED THE OLD DATA, THE DISTANCE TO REFERENCE MARK 2 WAS

QL0672'FOUND TO BE SHORTER BY 0.041 METER (0.135 FT) THE DIRECTION FROM THE

QL0672'AZIMUTH MARK TO REFERENCE MARK 1 DID NOT COMPARE WITH THE OLD DATA NOR

QL0672'DID THE ANGLE BETWEEN REFERENCE MARK 1 AND 2. THE DISTANCE TO

QL0672'REFERENCE MARK 1 WAS ALSO FOUND TO BE SHORTER BY 0.026 OF A METER.

QL0672'THE TO REACH FOR THIS STATION IS STILL ADEQUATE TO FIND THE STATION.

QL0672'

QL0672'THE STATION IS A STANDARD NGS DISK STAMPED--LORETTA 1954 1984--, SET

QL0672'INTO THE TOP OF A ROUND CONCRETE MONUMENT, 10 INCHES (30 CM) IN

QL0672'DIAMETER, PROJECTING 1 INCH (3 CM) ABOVE THE GROUND. THE STATION IS

QL0672'LOCATED 10.363 METERS (33.999 FT) WEST FROM THE APPROXIMATE CENTERLINE

QL0672'OF GRAVEL ROAD, 1.524 METERS (5.000 FT) EAST FROM A NORTH-SOUTH FENCE

QL0672'LINE AND 0.457 METERS (1.499 FT) EAST FROM A METAL WITNESS POST.

QL0672'

QL0672'REFERENCE MARK NO 1 IS A STANDARD CGS DISK STAMPED--LORETTA NO 1

QL0672'1954--, SET INTO THE TOP OF A SQUARE CONCRETE MONUMENT, 10 INCHES

QL0672'(30 CM) IN DIAMETER, FLUSH WITH GROUND. THE STATION IS LOCATED

QL0672'7.315 METERS (23.999 FT) EAST FROM THE APPROXIMATED CENTERLINE OF

QL0672'GRAVEL ROAD, 0.305 METERS (1.001 FT) WEST FROM A NORTH SOUTH FENCE

QL0672'LINE AND 0.305 METERS (1.001 FT) NORTH FROM A WITNESS POST AND 1.2

QL0672'METERS (3.9 FT) HIGHER THAN THE STATION.

QL0672'

QL0672'REFERENCE MARK NO 2 IS A STANDARD CGS DISK STAMPED--LORETTA NO 2

QL0672'1954--, SET INTO THE TOP OF A SQUARE CONCRETE MONUMENT, 10 INCHES

QL0672'(30 CM) IN DIAMETER, FLUSH WITH GROUND. THE STATION IS LOCATED

QL0672'11.582 METERS (37.999 FT) WEST FROM THE APPROXIMATE CENTERLINE OF

QL0672'GRAVEL ROAD, 0.305 METERS (1.001 FT) EAST FROM A NORTH SOUTH FENCE

QL0672'LINE AND 0.305 METERS (1.001 FT) NORTH FROM A WITNESS POST AND 0.5

QL0672'METER (1.6 FT) LOWER THAN THE STATION.

QL0672'

QL0672'AZIMUTH MARK NO 1 IS A STANDARD CGS DISK STAMPED--LORETTA 1954--, SET

QL0672'INTO THE TOP OF A SQUARE CONCRETE MONUMENT, 10 INCHES (30 CM) IN

QL0672'DIAMETER, FLUSH WITH GROUND. THE STATION IS LOCATED 10.363 METERS

QL0672'(33.999 FT) WEST FROM THE APPROXIMATE CENTERLINE OF GRAVEL ROAD,

QL0672'0.914 METERS (2.999 FT) NORTH FROM A 4 X 4 INCH WHITE WOODEN

QL0672'WITNESS POST, 0.610 METERS (2.001 FT) EAST FROM A NORTH-SOUTH FENCE

QL0672'LINE AND 0.305 METERS (1.001 FT) EAST FROM A METAL WITNESS POST.

QL0672'STATION IS LOCATED ABOUT 5.0 MILES (8.0 KM) EAST OF VULCAN ON A SMALL

QL0672'BARE HILL ALONG THE RIGHT-OF-WAY OF A GRAVEL ROAD. TO REACH FROM THE

QL0672'INTERSECTION OF U.S HIGHWAY 2 AND THE MAIN STREET IN NORWAY GO

QL0672'EASTERLY ON U.S HIGHWAY 2 FOR 2.4 MILES (3.9 KM) TO A CROSSROADS IN

QL0672'THE NORTH EDGE OF VULCAN. CONTINUE EAST ON HIGHWAY 2 FOR 4.7 MILES

QL0672'(7.6 KM) TO A PAVED ROAD LEFT WHICH TURNS INTO GRAVEL. TURN LEFT AND

QL0672'GO NORTH FOR 0.2 MILE (0.3 KM) TO THE STATION ON LEFT AS DESCRIBED.

QL0672

Edited December 20, 2010 by Z15