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Details for Benchmark: JV4845

N 39° 57.485 W 076° 27.489 (NAD 83)

Altitude: 607

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

Location:
In LANCASTER county, PA View Original Datasheet
Designation:
SUSQUEHANNOCK
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:

Must Read!

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Cool Benchmark

Found while hiking the Turkey Hill Trail. Great view from here. Interesting facts also.

Found while hiking the trail. Awesome view, first time I ever hike up here.

Very well preserved obviously. Awesome view

Get You Some Of That! Where's The Man?

Great hike up here to try and find Golden Ticket

Took a picture of it, I've been here several times! I was up on the hill Geocaching today...

Hiked up to this location today for a geocache. Visited the marker as well. Great location and view!

Working on WOTR : The House of Tudor and swung by for this cool benchmark with a view. Thanks!

[Photos:]
photoBenchmark JV4845

In pursuit of numbers to finish WOTR. This find was a nice bonus. Beautiful view from here and the closest I've ever been to the windmills.

hiked up with sister, hubby and bro in law today.

Hiked up the Turkey Hill trail in pursuit of a nearby geocache and found this survey marker at coords as well. Can't miss it!

Love this bench mark. We found the other disk on the bridge then hiked up here to check this one out.

[Photos:]
photoimage
photoimage
photoimage

I was here; I've been here several times and always examine the marker. I looked for the usual brass disk but didn't realize it was buried underground below the concrete marker. Ah-ha.

Found the benchmark, the story behind the arEa and enjoyed the view.

Retroactive log. Found this while with polecat and ka3upe.

Found with Polecat 42.. forgot to log did it today.......TFTBM.

Found on a Turkey Hill Cache Run.

[Photos:]
photoView North to Columbia/Wrightsville.

what a perfect site over the Susquehanna

On a caching trip to Turkey Hill Trail and found this monument. To short to see into the monument.

This entry was edited by geojo1 on Tuesday, 17 May 2011 at 19:13:46 UTC.

[Photos:]
photoTHTNP monument

Found while caching on Turkey Hill. This is a great spot for a view.

Once you get on top of the hill this is an easy find. It stands out clearly on the edge of the hill.

I looked for the azimuth mark but was in the wrong place. I will look again later.

4/6/08 finally returned to search for the azi, with no luck. I thought I found the caternary pole it was on but after I dug ballast off most of it I didn't see a disk.

9/12/08 My inability to find the azi was bugging me so I did some Google Earth research and found that the angle to the azi hit two places along the river shore. I measured the distance from the post office in the town as described and picked a spot. On a rainy afternoon I walked up the tracks and dug ballast off the caternary post I suspected held the mark and was elated to find it.

[This entry was edited by mloser on Sunday, April 06, 2008 at 8:03:51 PM.]

[This entry was edited by mloser on Monday, September 22, 2008 at 6:52:37 PM.]

[Photos:]
photoJV4845 "Susquehannock", Lancaster County, PA loc
The monument is concrete and is painted white on the river side. It was most likely used to survey the Safe Harbor Dam area. The dam is a few miles down river.
photoJV4845 "Susquehannock", Lancaster County, PA
The top of the monument has a brass plate to mount a survey instrument on. There was probably a screw cover on the top but it is gone. There are grooves in the top plate that most likely point to other markers but there was no writing or indication about what they pointed to.
photoJV4845 "Susquehannock", Lancaster County, PA
I took a couple of pics into the hole, hoping to get an image of the actual disk. As you can see people have been dropping stuff into it and there is no evidence of the disk. Note the blurry thing to the bottom. See next pic for a better pic of what it is.
photoJV4845 "Susquehannock", Lancaster County, PA
Good thing I didn't reach down into this hole. The spider living in there is HUGE!
photoJV4845 "SUSQUEHANNOCK AZI", Lancaster County, PA
photoJV4845 "SUSQUEHANNOCK AZI", Lancaster County, PA

Found it, while looking for the Turkey Hill cache. The survey marker has been gone for years, as long as I've been hiking here.

[Photos:]
photosusquehannock.jpg

Found this survey disk on our cache hunt on Turkey Hill.

Documented History (by the NGS)

01/01/1950 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1950 (MLC) THE STATION IS LOCATED ON THE HIGHEST POINT WEST OF TURKEY HILL DAIRY FARM, 7 MILES SSE OF THE TOWN OF COLUMBIA, 5-1/2 MILES NE OF SAFE HARBOR, 6 FEET FROM EDGE OF THE RIVER ENBANKMENT (WHICH IS ABOUT 390 FEET ABOVE THE LAKE FORMED BY THE SAFE HARBOR DAM), 335 FEET NE OF TURKEY HILL 1934, ABOUT 233 FEET NNE OF TURKEY RM NO 2 AND ABOUT 360 FEET SE OF TURKEY HILL RM NO 1. STATION MARK IS STANDARD DISK SET IN CONCRETE STAMPED SUSQUEHANNOCK 1950 AND IS ABOUT 30 INCHES UNDERGROUND. (THE MARK WAS SET BY C.F. MERRIAM, PA. WATER AND POWER CO.) TO REACH THE STATION FROM COLUMBIA, GO SOUTH ON RIVER ROAD 6.3 MILES TO TURKEY HILL DAIRY. TURN RIGHT WHERE MAIN ROAD TURNS LEFT. PROCEED THROUGH BARNYARD AND CONTINUE 0.7 MILE TO TOP OF HILL AND GATE. STATION IS ABOUT 100 YARDS ACROSS CULTIVATED FIELD. ENE FROM THE GATE.
01/01/1950 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1950 (CFM) LETTER OF C.F. MERRIAM, BALTIMORE, MD., DATED NOV 2, 1950 STATION MARK, ALTHOUGH ABOUT 30 INCHES UNDERGROUND, IS VISIBLE FOR AN OPTICAL PLUMB THROUGH 3-INCH IRON PIPE EXTENDING THROUGH THE AXIS OF SUBSTANTIAL CONCRETE MONUMENT. THE MONUMENT IS SURMOUNTED WITH HEAVY BRASS CAP WHICH SERVES AS A PERMANENT INSTRUMENT SUPPORT.
01/01/1950 by CGS (GOOD)
01/01/1966 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1966 (ELH) THE STATION AND CONCRETE MONUMENT WERE RECOVERED IN GOOD CONDITION. THE STAMPING ON THE STATION MARK COULD NOT BE CHECKED DUE TO THE MONUMENT. THE POINT HELD WAS THE CENTER OF THE 3-INCH IRON PIPE. AN AZIMUTH MARK WAS ESTABLISHED AT THIS TIME. A TO REACH AND MEASUREMENTS FOLLOWS. TO REACH THE AZIMUTH MARK FROM THE POST OFFICE IN WASHINGTON BORO, WHICH IS ABOUT 4 MILES SOUTH OF COLUMBIA, GO SOUTH ON RIVER ROAD FOR 0.55 MILE TO THE MARK ON THE RIGHT. THE AZIMUTH MARK IS 115 FEET SOUTHWEST OF THE APPROXIMATE CENTER OF RIVER ROAD, 64 FEET WEST OF THE APPROXIMATE CENTER OF TRACK ROAD AND 9 FEET EAST OF THE EAST RAIL OF RAILROAD TRACKS. THE MARK IS A STANDARD DISK CEMENTED IN A DRILL HOLE IN THE CONCRETE BASE OF A POWERLINE POLE AND STAMPED SUSQUEHANNOCK 1950 1966.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1992.
  • 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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