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Details for Benchmark: PG2140

N 44° 42.164 W 073° 51.832 (NAD 83)

Altitude: 1161

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

Location:
In CLINTON county, NY View Original Datasheet
Designation:
LYON
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

Must Read!

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I was a bit deceived to not find one of the round markers at the tower, so I decided to give a try on that one while I was waiting for the other members of today's hike to reach the summit. I remembered about a comment regarding some bushwacking to the benchmark. Yikes, a bushwack it was! No matter if you try this one in winter or summer, the vegetation is pretty thick.

But what a rewarding find. You feel like you're alone out there. An awesome view, no one around and a nice outcrop to sit and enjoy.

Benchmark was in excellent condition and right on the coordinates.

[Photos:]
photoBenchmark and GPSr
photoGeneral view

This was a neat one to find. The underbrush getting to it was extremely thick but I made it and found the bench mark. I am sure the reference marks are somewhere there too but I couldn't find them. A good portion of the rock outcrop where the reference marks are located is now covered with trees. I imagine 70years ago the entire rock outcrop was bare but its grown in quite nicely now.

[Photos:]
photoIt's in excellent shape.
photoCoordinates are close
photoRock outcrop with benchmark

This is the information for the Azimuth mark for PID 2140 designation LYON. I followed the directions from 1/1/1961 this is a direct copy from the data sheet. (TO REACH FROM THE TOWN HALL IN DANNEMORA, GO WESTERLY ON STATE HIGHWAY NO. 374 FOR 9.0 MILES TO SIDE ROAD LEFT AT SIGN FOREST SERVICE FIRE TOWER LYON MOUNTAIN. TURN LEFT AND GO SOUTHERLY ON SURFACED ROAD FOR 1.8 MILES TO SIDE ROAD RIGHT. (CONTINUE SOUTHERLY ON SURFACED ROAD FOR 1.75 MILES TO LOG CABIN ON LEFT (EAST) SIDE OF ROAD AND AZIMUTH MARK ON LEFT AS DESCRIBED).

2008 Updated Directions
To reach from the prison in Dannemora go westerly on State Highway number 374 for approximately 9.0 miles to Chazy Lake Road. Turn left and go southerly on Chazy Lake Road for approximately 1.8 miles to a side road on the right, now known as the Lowenburg road. The Lowenburg road is not marked, it is a minimum maintenance road and it is gravel. This is the road to take if you want to climb Lyon Mountain there is a parking area at the end and the hiking trail starts from the parking area. Do not take the Lowenburg road to find the Azimuth mark. Continue southerly on Chazy Lake Road for approximately 1.9 miles to house on left (East side of road and Azimuth mark on left as described.

Description of Azimuth mark from Data sheet
A STANDARD DISK SET IN A ROUND CONCRETE MONUMENT AND STAMPED LYON 1942 RESET 1961 IS 102 FEET SOUTHEAST OF THE APPROXIMATE CENTERLINE OF SURFACED ROAD, 34-1/2 FEET WEST OF THE SOUTHWEST CORNER OF A LOG CABIN AND 11 FEET NORTHEAST OF TWO SMALL APPLE TREES.

Description is still pretty accurate but the Log Cabin is now covered with a cream colored mud,concrete, or stucco like finish and the two small apple trees are quite huge now some 47 years later. I visited in the winter and there was no one living there but it looks like it may be used as a summer home. It was a neat find following directions from 47 years ago.

[Photos:]
photoJust like brand new after 47 years
photoMonument and Azimuth marker from distance
photoThe two small apple trees are now huge
photoAzimuth mark and round cement monument

Documented History (by the NGS)

1/1/1942 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1942 (FBQ) THE STATION IS ABOUT 9.5 MILES W OF DANNEMORA, ON THE SUMMIT OF LYON MOUNTAIN, A LARGE, PROMINENT, FLAT-TOPPED MOUNTAIN WHICH IS ALSO THE SITE OF LYON MOUNTAIN LOOKOUT TOWER OF THE NEW YORK CONSERVATION DEPARTMENT. THE STATION IS ON THE E EDGE OF THE SUMMIT ABOUT 275 YARDS SW OF THE LOOKOUT TOWER. IT IS STAMPED LYON 1942. STATION AND REFERENCE MARKS ARE BRONZE DISKS SET IN DRILL HOLES IN OUTCROPPING BEDROCK. AZIMUTH MARK IS A BRONZE DISK SET IN CONCRETE, AS DESCRIBED IN NOTE 11A. REFERENCE MARK NO. 1 IS N OF THE STATION AND IN THE SAME SECTION OF OUTCROPPING ROCK. IT IS STAMPED LYON NO. 1 1942. REFERENCE MARK NO. 2 IS SW OF THE STATION AND IS ALSO IN THE SAME LARGE SECTION OF OUTCROPPING BEDROCK IN WHICH THE STATION IS LOCATED. IT IS STAMPED LYON NO. 2 1942. THE AZIMUTH MARK IS ABOUT 2 MILES E OF THE STATION, 14 FEET E OF THE CENTER LINE OF A N-S DIRT ROAD, 50 YARDS NW OF A LOG HOUSE. IT IS STAMPED LYON 1942 AND PROJECTS 4 INCHES. TO REACH FROM THE SW CORNER OF THE PRISON IN DANNEMORA GO W ON NEW YORK HIGHWAY 374 FOR 9.15 MILES AND TURN SHARP LEFT ON A DIRT ROAD AT SIGN LYON MT. FIRE OBSERVATORY. GO 2.0 MILES AND TURN RIGHT ON A DIM SIDE ROAD (TO REACH THE AZIMUTH MARK KEEP STRAIGHT AHEAD FOR 2.2 MILES TO THE MARK ON THE E SIDE OF THE ROAD). GO 0.05 MILE TO A SMALL FOOT BRIDGE AND THE END OF TRUCK TRAVEL. THEN FOLLOW THE TRAIL TO THE SUMMIT OF THE MOUNTAIN AND THE STATION. IT IS ABOUT 1 1/2-HOUR PACK. A 34-FOOT SIGNAL AT DANNEMORA, A 16-FOOT SIGNAL AT BIGELOW, A 50-FOOT SIGNAL AT CLAYBURG, A 6-FOOT SIGNAL AT WHITEFACE MT., 4-FOOT SIGNALS AT HOGBACK MT., SUGARBUSH AND LOON ARE VISIBLE FROM A 4-FOOT STAND. HEIGHT OF LIGHT ABOVE STATION MARK 1 METER.
1/1/1961 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (SCM) STATION AND REFERENCE MARKS NO. 1 AND 2 WERE RECOVERED AS DESCRIBED AND FOUND IN GOOD CONDITION. AZIMUTH MARK WAS NOT RECOVERED AND IS BELIEVED TO HAVE BEEN DESTROYED BY ROAD CONSTRUCTION. THEREFORE A NEW AZIMUTH MARK WAS ESTABLISHED IN THE VICINITY OF THE OLD AZIMUTH MARK. A CHECK WAS MADE OF THE DISTANCE AND DIRECTION TO REFERENCE MARKS NO. 1 AND 2 AND FOUND TO BE CORRECT AND ARE AS DESCRIBED IN THE ORIGINAL DESCRIPTION. AZIMUTH MARK, A STANDARD DISK SET IN A ROUND CONCRETE MONUMENT AND STAMPED LYON 1942 RESET 1961 IS 102 FEET SOUTHEAST OF THE APPROXIMATE CENTERLINE OF SURFACED ROAD, 34-1/2 FEET WEST OF THE SOUTHWEST CORNER OF A LOG CABIN AND 11 FEET NORTHEAST OF TWO SMALL APPLE TREES. THE MARK PROJECTS 4 INCHES. NOTE--16B. TO REACH FROM THE TOWN HALL IN DANNEMORA, GO WESTERLY ON STATE HIGHWAY NO. 374 FOR 9.0 MILES TO SIDE ROAD LEFT AT SIGN FOREST SERVICE FIRE TOWER LYON MOUNTAIN. TURN LEFT AND GO SOUTHERLY ON SURFACED ROAD FOR 1.8 MILES TO SIDE ROAD RIGHT. (CONTINUE SOUTHERLY ON SURFACED ROAD FOR 1.75 MILES TO LOG CABIN ON LEFT (EAST) SIDE OF ROAD AND AZIMUTH MARK ON LEFT AS DESCRIBED). TURN RIGHT, PASS THROUGH LOCKED GATE AND GO WESTERLY ON WOODS ROAD FOR 3.0 MILES TO RANGERS CABIN AND END OF TRUCK TRAVEL FOR 4 WHEEL DRIVE VEHICLE. PACK SOUTHWESTERLY ON CLEARED TRAIL FOR ABOUT 45 MINUTES TO FOREST SERVICE FIRE TOWER. CONTINUE SOUTHWESTERLY ABOUT 200 YARDS TO STATION AS DESCRIBED IN 1942 DESCRIPTIONS. 1961 OBSERVATIONS TAKEN FROM A 30 FOOT WOOD STAND.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1999.
  • 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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