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Details for Benchmark: PD0894

N 44° 45.529 W 067° 06.480 (NAD 83)

Altitude: 225.8

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

Location:
In WASHINGTON county, ME View Original Datasheet
Designation:
TRESCOTT ROCK
Marker Type:
bolt
Setting:
in rock outcrop
Stability:

Reference Points

Must Read!

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My wife and I took a 10 day vacation to Down East Maine and to the Bay of Fundy. With the myriad of stations in that area I had to be selective in what I went to look for (after all this was a vacation, not a benchmarking trip). I decided to go after two sorts of marks: boundary markers of various sorts, and triangulation stations which where part of the survey for the Eastern Oblique Arc, done in this area in the 1850s. A surprising number of these marks have survived in this area.

This one was on a hill know as "The Porcupine" which no one in the area had ever heard of. Finally someone told us "Oh, that's on Wayne Jones' Road". This seemed to be the same road described in the 1960 NGS log. I found the road, and the fork, but no trail. So I bushwhack about 1/2 mile through fairly open woods. I scrambled up one false peak before hitting the right peak, which was a rocky pinnacle with 20 foot drop offs on 3 sides, but a way up on the 4th side. The result was great: the 1861 station - good as new (well, almost) and the 2 reference marks (from the 1930s?) staring me in the face and great views including a siting of Grand Manan Island across the channel.

When I got back to the car, there was my wife talking to Wayne Jones, a hard working lobsterman who owned "this side" of the mountain. As usual for Mainers, he was friendly and happy that I had found what I came looking for,

[Photos:]
photoPD0894 - TRESCOTT ROCK, Trescott ME
The station mark was a copper bolt set within a triangle cut in the rock. The two holes are reference marks 1 & 2.
photoPD0894 - TRESCOTT ROCK, Trescott ME
Closeup of the station mark.
photoPD0894 - TRESCOTT ROCK RM4, Trescott ME
The two reference mark disks were set by the Geodetic Survey of Canada, probably in the 1930s.
photoPD0894 - TRESCOTT ROCK RM5, Trescott ME
The two reference disks were set by the Geodetic Survey of Canada, probably in the 1930s.
photoPD0894 - TRESCOTT ROCK View, Trescott ME
This view is looking east from the summit. Grand Manan Island (Canada) is visible on the horizon.
photoPD0894 "Trescott Rock", Trescott Twp, Maine
Showing the copper plug in the chiseled triangle.
photoPD0894 "Trescott Rock", Trescott Twp, Maine
The woods road heading north past the trailers on Wayne Jones property.
photoPD0894 "Trescott Rock", Trescott Twp, Maine
Wayne Jones' trailer and the start of the woods road.

Documented History (by the NGS)

01/01/1861 by CGS (MONUMENTED)
01/01/1946 by CGS (GOOD)
DESCRIBED BY COAST AND GEODETIC SURVEY 1946 (RAG) STATION IS ON THE SUMMIT OF A PROMINENT, BARE, ROCKY HILL KNOWN LOCALLY AS THE PORCUPINE (ON MAP AS LIBERTY CAP), ABOUT 4 MILES SE OF WHITING, AND 1 MILE W OF THE HEAD OF HAYCOCK HARBOR. THE BARE, ROCKY PINNACLE IS WELL ABOVE THE TREES ON THE HILLSIDE AND IS THE MOST PROMINENT FEATURE IN THE VICINITY. THE SHORE ROAD FROM LUBEC TO CUTLER IS ABOUT 1/2 MILE S OF THE STATION AND A ROAD LEADING TO WHITING IS ABOUT THE SAME DISTANCE E. THESE TWO ROADS MEET ABOUT 100 METERS W OF THE CREEK FLOWING INTO THE HEAD OF HAYCOCK HARBOR. THE STATION IS ON THE HIGHEST POINT ON THE HILL, A FAIRLY SMOOTH ROCK LEDGE ABOUT 5 METERS IN DIAMETER. STATION MARK IS A COPPER BOLT SET IN A DRILL HOLE IN THE LEDGE AND SURROUNDED BY A LARGE TRIANGLE CUT IN THE ROCK. REFERENCE 1 IS A DRILL HOLE WSW OF STATION. REFERENCE 2 A DRILL HOLE WSW OF STATION AND S OF MARK 1. REFERENCE 3 IS A COPPER BOLT WNW OF THE STATION, REFERENCE 4 A GEODETIC SURVERY OF CANADA BRONZE REFERENCE DISK SET IN A DRILL HOLE IN THE ROCK SSE, AND REFERENCE 5 A SIMILAR BRONZE DISK SET IN THE ROCK NNE OF THE STATION. TO REACH THE STATION FROM WEST LUBEC POST OFFICE, DRIVE S ON STATE HIGHWAY 191, ABOUT 4.5 MILES TO A POINT ABOUT 170 METERS SW OF THE SMALL STREAM EMPTYING INTO THE HEAD OF HAYCOCK HARBOR. TURN NE ON AN OLD ROAD AND PROCEED 0.4 MILE TO END OF TRUCK TRAVEL. CONTINUE ALONG THE OLD ROAD ABOUT 400 METERS, THENCE CLIMB ABOUT 600 METERS TO SUMMIT OF HILL AND STATION.
01/01/1960 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1960 (HRL) STATION WAS RECOVERED AS DESCRIBED BY R.A.G. IN 1946 AND ALL MARKS WERE FOUND TO BE IN GOOD CONDITION. REFERENCE MARK NO. 4 WAS TOO NEAR TO FOCUS ON. THE 1946 DESCRIPTION IS ADEQUATE BUT A NEW TO REACH STATION DESCRIPTION FOLLOWS. TO REACH STATION FROM THE POST OFFICE IN CUTLER GO NORTHERLY ON STATE HIGHWAY 191 FOR 9.55 MILES TO A SIDE ROAD LEFT. TURN LEFT AND GO WESTERLY ON TRACK ROAD FOR 0.1 MILE TO A HOUSE ON THE RIGHT AND END OF TRUCK TRAVEL FOR ALL BUT A FOUR WHEEL DRIVE. PACK WESTERLY ON WOODS ROAD FOR ABOUT 0.1 MILE TO A FORK. TAKE RIGHT FORK FOR ABOUT 0.1 MILE TO WHERE MAIN ROAD TURNS LEFT AND A DIM ROAD CONTINUES STRAIGHT AHEAD. TURN LEFT AND GO ABOUT 0.1 MILE TO AN OLD LOGGING CAMP. CONTINUE ON WOODS ROAD FOR ABOUT 0.05 MILE TO A DIM FOOT TRAIL LEFT. FOLLOW DJM TRAIL AND BLAZED TREES NORTHWESTERLY FOR ABOUT 0.2 MILE TO TOP OF HIGH ROCK AND STATION AS DESCRIBED. THIS IS ABOUT A 20 MINUTE PACK FROM THE END OF TRUCK TRAVEL. 1960 OBSERVATIONS TAKEN FROM A 4 FOOT STAND.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in March 1998.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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