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Details for Benchmark: LY2623

N 41° 10.351 W 074° 47.675 (NAD 83)

Altitude: 1348

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

Location:
In SUSSEX county, NJ View Original Datasheet
Designation:
CULVERS GAP
Marker Type:
bolt
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

Reference Points

Must Read!

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Dolphin needed some exercise, and this (and the nearby cache) offered the opportunity. I hiked up the Acropolis Trail (with some bushwhacking). This one is a bit confusing. Somewhere it seems to have changed from the 1881 copper bolt to an iron bolt. 1974 recovery (DNF) calls it iron. 1990 recovery mentions finding the iron bolt, but not the copper one. This is a beautiful area with spectacular views! (And a five hundred foot climb!) When the lodge was built, it seems that a lot of soil was brought in to level the area. Distance and direction from Reference Marks lead to the 1990 recovery location. It took quite a bit of digging in the 'fire pit' and removal of a few large rocks to uncover the iron bolt. Digging up pink paint told me that I was in the area of the 1990 recovery! I didn't measure it, but I would estimate that the bolt is about two feet underground.
It's official! The state of New Jersey cannot count consecutively! RM1 was located first. It is labelled 3. RM2 was found by measuring distance and angle from the station. It is labelled 2. Located RM 3 the same way, and the realization that the 1990 crew dug a hole. Disk found in hole. It is about 4 inches underground. It is labelled 2. At least they got one right!
Mision accomplished, I hiked back down the Appalachian Trail to Rte 206 at Culvers Gap. I glanced off to the left, and saw a black bear, balanced on a log, watching me. First bear for the year. I do not stop to take off my backpack to get my camera to take pictures of bears that are watching me!
Hand-held GPS coordinates:
RM1: N 41 10 21.1 W 74 47 40.5
PM2: N 41 10 21.4 W 74 47 40.2
RM3: N 41 10 21.0 W 74 47 41.1

[Photos:]
photoLY2623 View from the Acropolis
photoLY2623 RM3 Sussex NJ View Northwest
photoLY2623 RM3 Sussex NJ Close Up Labelled 2!
photoLY2623 RM2 Sussex NJ View Northwest
Toward Kitatinny Lake
photoLY2623 RM2 Sussex NJ Close Up
photoLY2623 RM1 Sussex NJ View East
photoLY2623 RM1 Sussex NJ Close Up
Labelled 3?
photoLY2623 Sussex NJ View East Toward Culver Lake
photoLY2623 Sussex NJ View Northeast
photoLY2623 Sussex NJ Eye Level View
photoLY2623 Sussex NJ Close Up

Found spot where bolt used to be with my son Mike. Also found ref mark 1 marked with a 3.

Found reference mark #1 (stamped 3) atop the ridge.

[Photos:]
photoReference mark #1
Reference mark #1

Documented History (by the NGS)

01/01/1881 by CGS (MONUMENTED)
01/01/1906 by CGS (GOOD)
DESCRIBED BY COAST AND GEODETIC SURVEY 1906 STATION IS ON THE HIGH RIDGE OF THE BLUE MOUNTAINS ON THE SW SIDE OF THE OPENING CALLED CULVERS GAP. THE ROAD FROM BRANCHVILLE TO MILFORD PASSES THROUGH THIS GAP AT A DISTANCE OF 1/3 MILE FROM THE STATION. BRANCHVILLE LIES ABOUT 3 MILES TO THE SE, TUTTLES CORNER 1-3/4 MILES TO THE N AND CULVERS POND 1/3 MILE TO THE E. AN OLD TOWER FORMERLY STOOD 170 PACES NE OF THE STATION AND ITS LOCATION IS WELL KNOWN IN THE REGION. A WOOD ROAD FROM THIS TOWER JOINS THE BRANCHVILLE-MILFORD ROAD AT A POINT ABOUT 100 METERS TO THE SE OF THE MOUNTAIN HOUSE, A HOTEL JUST NW OF THE GAP. THE STATION IS MARKED BY A COPPER BOLT SET IN THE ROCK. A CROSS IS ALSO CUT IN THE LEDGE ABOUT 4 INCHES W OF THE BOLT, 6 TO 8 INCHES HIGHER AND A LARGE BOULDER 16 FEET 3 INCHES TO THE NE OF THE STATION IS SIMILARLY MARKED.
01/01/1936 by NJGS (GOOD)
RECOVERY NOTE BY NEW JERSEY GEODETIC SURVEY 1936 RECOVERED IN GOOD CONDITION. TRACES OF THE FOUNDATION OF THE OLD TOWER MENTIONED IN THE ORIGINAL DESCRIPTION STILL REMAIN. THE CROSS CUT IN THE LEDGE 4 INCHES W OF BOLT HAS BEEN ALMOST ENTIRELY OBLITERATED AND A LARGE BOULDER 16 FEET 3 INCHES NE OF STATION HAS BEEN PARTIALLY BROKEN UP, INCLUDING THE PORTION ORIGINALLY MARKED WITH A CROSS. THREE NEW REFERENCE MARKS WERE ESTABLISHED. THEY ARE STANDARD STATE SURVEY BRONZE DISKS SET IN LEDGE ROCK.
01/01/1936 by NJGS (GOOD)
RECOVERY NOTE BY NEW JERSEY GEODETIC SURVEY 1936 RECOVERED IN GOOD CONDITION AS DESCRIBED. STATION IS A 3/4-INCH COPPER BOLT SET IN LEDGE ROCK. REFERENCE MARK NO.1 IS A STANDARD STATE SURVEY DISK, SET IN LEDGE ROCK OUTCROP. REFERENCE MARK NO.2 IS A STANDARD STATE SURVEY DISK, SET IN LEDGE ROCK OUTCROP. REFERENCE MARK NO.3 IS A STANDARD STATE SURVEY DISK, SET IN LEDGE ROCK. AZIMUTH MARK IS MONUMENT NO.2449, A STANDARD STATE SURVEY DISK, SET IN CONCRETE ON THE E SIDE OF STATE HIGHWAY 31, 2.6 MILES NW OF THE INTERSECTION OF BROAD STREET AND WANTAGE AVENUE, BRANCHVILLE. IT IS 22 FEET E OF THE CENTER LINE OF CONCRETE PAVEMENT AND 16 FEET N OF THE CENTER LINE OF A DRIVEWAY TO THE E. DISTANCES AND DIRECTIONS SHOULD BE REVISED AS FOLLOWS--
01/01/1942 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1942 (GWL) STATION WAS RECOVERED AS DESCRIBED BY THE RECOVERY NOTE OF 1936. ALL MARKS WERE FOUND IN GOOD CONDITION. REFERENCE MARK NO.3 IS 36.48 FEET FROM THE STATION INSTEAD OF 36.54 FEET AS LISTED IN THE 1936 DESCRIPTION. THE REFERENCE MARKS ARE NOT STAMPED AS THEY ARE LISTED. REFERENCE MARK NO.1 IS STAMPED 3 AND THE OTHER TWO ARE STAMPED 2. STATE SURVEY MONUMENT NO.2449, ESTABLISHED AS AN AZIMUTH MARK BY NEW JERSEY GEODETIC SURVEY IN 1936, WAS NOT RECOVERED. TRIANGULATION STATION SMITHS HILL 2 (N.J.G.S. 1936) WILL SERVE AS AN AZIMUTH MARK. HIGH POINT MONUMENT OR THE NORMANOCK LOOKOUT TOWER WILL ALSO BE VERY SUITABLE FOR AZIMUTH MARKS. FOLLOWING IS A COMPLETE DESCRIPTION OF THE STATION. THE STATION IS ON A HIGH RIDGE OF THE BLUE MOUNTAINS, IN A CLEARING ON THE APPALACHIAN TRAIL, ABOUT 0.3 MILE W OF THE W END OF CULVERS LAKE, ABOUT 0.3 MILE SW OF THE ROAD THAT RUNS THROUGH CULVERS GAP, AND ABOUT 3 MILES NW OF THE TOWN OF BRANCHVILLE. IT IS A 3/4-INCH COPPER BOLT SET FLUSH IN BEDROCK. REFERENCE MARK NO.1 IS SE OF THE STATION, ON THE S SLOPE OF THE RIDGE. IT IS A STANDARD N.J. DEPARTMENT OF CONSERVATION AND DEVELOPMENT GEODETIC CONTROL DISK SET FLUSH IN BEDROCK AND STAMPED 3. REFERENCE MARK NO.2 IS NE OF THE STATION, ON THE NE SLOPE OF THE RIDGE. IT IS A STANDARD STATE SURVEY DISK SET FLUSH IN BEDROCK AND STAMPED RM 2. REFERENCE MARK NO.3 IS WSW OF THE STATION, ON THE SW SLOPE OF THE RIDGE. IT IS A STANDARD N.J. DEPARTMENT OF CONSERVATION AND DEVELOPMENT GEODETIC CONTROL DISK SET FLUSH IN BEDROCK AND STAMPED 2. TO REACH THE STATION FROM THE COURTHOUSE IN NEWTON GO NORTHERLY ON STATE HIGHWAY S-31 FOR 11.8 MILES TO THE SUMMIT OF CULVERS GAP AND A DIRT ROAD LEFT AT A SIGN YOU HAVE JUST PASSED LAKE KITTATINNY. THIS IS THE END OF TRUCK TRAVEL. FROM THIS POINT PROCEED ON FOOT UP THE APPALACHIAN TRAIL, WESTERLY, TO THE SUMMIT AT A SMALL CLEARING AND THE STATION. THE PACK REQUIRES ABOUT 20 MINUTES. A 4-FOOT STAND WILL SEE AN 8-FOOT LIGHT AT STATION SMITHS HILL 2 (N.J.G.S. 1936). A 4-FOOT STAND WILL SEE A 74-FOOT LIGHT AT STATION ISLEE. A 4-FOOT STAND WILL SEE A 47-FOOT LIGHT AT STATION DE LENOY. A 4-FOOT STAND WILL SEE A 4-FOOT LIGHT AT STATION KRECH (N.J.G.S. 1938). A 4-FOOT STAND WILL SEE A 4-FOOT LIGHT AT STATION SUNRISE (N.J.G.S.).
01/01/1954 by USGS (MARK NOT FOUND)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1954 STATION NOT RECOVERED. THE COPPER BOLT MARKING THE ORIGINAL STATION WAS NOT FOUND. REFERENCE MARKS 1 AND 2 WERE RECOVERED.
01/01/1974 by NGS (MARK NOT FOUND)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1974 (CLN) THE STATION IS NOW LOCATED UNDER A NEWLY CONSTRUCTED LODGE BUILDING. THE BUILDING WAS CONSTRUCTED ON THE HIGHEST POINT OF THE HILL, DIRECTLY OVER THE STATION. IT IS POSSIBLE THAT THE IRON PEG IS STILL INTACT BELOW THE FLOOR OF THE LODGE, HOWEVER IT COULD NOT BE VARIFIED AT THIS DATE. ALL REFERENCE MARKS WERE RECOVERED AND FOUND IN GOOD CONDITION AS DESCRIBED. THE AZIMUTH MARK WAS ALSO RECOVERED AND FOUND IN GOOD CONDITION AS DESCRIBED. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN 3 MILES SOUTHEAST OF TUTTLES.
06/30/1990 by NJGS (GOOD)
RECOVERY NOTE BY NEW JERSEY GEODETIC SURVEY 1990 THE STATION IS LOCATED ON THE BORDER OF SANDYSTON AND FRANKFORD TOWNSHIPS ON ONE OF THE SUMMITS OF THE KITTATINNY MOUNTAINS ON THE SOUTHWEST SIDE OF THE OPENING KNOWN AS CULVERS GAP. TO REACH THE STATION FROM THE JUNCTION OF U.S. ROUTE 206 AND COUNTY ROAD 636 AT KITTATINNY LAKE, GO EAST ON U.S. ROUTE 206 FOR 0.4 MI (0.6 KM) TO A WOODS ROAD ON THE RIGHT AT AN IRON GATE AND THE ACROPOLIS TRAIL HEADING SOUTH. THE KEY TO OPEN THE GATE CAN BE OBTAINED FROM THE RANGERS OFFICE AT STOKES STATE FOREST. GO SOUTH ON THIS ROAD, GOING UPHILL, FOUR WHEEL DRIVE VEHICLE IS NECESSARY, TO THE RADIO TOWER AT THE END OF THE ROAD. PACK NORTH FOR 75 PACES FROM THE WEST EDGE OF THE FENCE SURROUNDING THE TOWER TO THE STATION IN A ONE METER WIDE DEPRESSION IN THE MIDDLE OF A CLEARING USED AS A FIRE PIT BY CAMPERS. THE STATION IS A HALF INCH DIAMETER IRON BOLT SET IN BEDROCK, ABOUT O.3 M BELOW SURFACE OF THE GROUND, PROJECTING 0.07 M (0.23 FT) ABOVE THE BEDROCK AND IS THE SAME AS DESCRIBED IN THE 1974 RECOVERY. NO TRACES OF THE COPPER BOLT DESCRIBED IN THE 1942 RECOVERY COULD BE FOUND. ALL REFERENCE MARKS MENTIONED IN THE 1942 RECOVERY HAVE BEEN FOUND, HOWEVER, REFERENCE MARK NUMBER 3 IS NOW 0.1 M (0.3 FT) BELOW THE SURFACE OF THE GROUND. NO MEASUREMENTS WERE TAKEN AT THIS TIME.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in May 1999.
  • The orthometric height was determined by GPS observations and a high-resolution geoid model.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • The geoid height was determined by GEOID99.

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