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Details for Benchmark: OB0265

N 43° 56.417 W 069° 57.573 (NAD 83)

Altitude: 241.42

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

Location:
In SAGADAHOC county, ME View Original Datasheet
Designation:
ARARAT
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

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Nice walk from my parents' home.

stood on that one too

Found it.©

Found it.®

Found as described. Slightly south of the southwest post of the fence surrounding the look out tower.

[This entry was edited by Harry Dolphin on Sunday, July 16, 2006 at 3:42:16 AM.]

[Photos:]
photoOB0265 Topsham Sagadahoc ME Close Up
photoOB0265 Topsham Sagadahoc ME View Northwest

I too found this exactly as described. Still looks stable.
Coordinates were right on.

[Photos:]
photoDisk and immediate surrondings
photoCloseup of disk

Exactly where it says it is. Survey disk is in good shape and cement post is still very stable.

Team Teebow

[Photos:]
photoSurvey Disk

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1933 (CMD) ON THE S SLOPE OF THE HIGH HILL KNOWN LOCALLY AS MOUNT ARARAT, WHICH IS ABOUT 2 MILES N OF THE CITY OF BRUNSWICK. ON THE SAME HILL IS A FIRE LOOKOUT TOWER ABOUT 75 FEET HIGH AND IS KNOWN AS THE MOUNT ARARAT FIRE LOOKOUT TOWER. STATION MARK IS 18.95 METERS SSW OF THE OUTSIDE ANCHOR BOLT OF THE SW LEG. STATION MARK IS A STANDARD BRONZE DISK SET IN THE TOP OF A SQUARE BLOCK OR POST OF CONCRETE. REFERENCE MARKS ARE STANDARD BRONZE DISKS WEDGED IN DRILL HOLES IN OUTCROPPING BEDROCK. REFERENCE MARK NO. 1 IS IN THE LEDGE, 11.10 METERS W OF THE SW ANCHOR BOLT AND 15.40 METERS S OF W OF THE SE ANCHOR BOLT. REFERENCE MARK NO. 2 IS IN THE CONCRETE PEDESTAL WHICH SUPPORTS THE SE LEG OF THE TOWER. HEIGHT OF SIGNAL ABOVE STATION MARK - 16 METERS.
01/01/1934 by MEGS (SEE DESCRIPTION)
RECOVERY NOTE BY MAINE GEODETIC SURVEY 1934 STATION FOUND AS DESCRIBED. WOODEN INSTRUMENT TOWER STILL IN PLACE.
01/01/1972 by USGS (SEE DESCRIPTION)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1972 (JES) STATION AND RMS FOUND IN GOOD CONDITION AS DESCRIBED, EXCEPT THAT THE DESCRIPTION FOR THE RMS SHOULD BE REVERSED. RM 1 SHOULD READ TO BE IN THE SE LEG OF THE LOT, AND RM 2 SHOULD READ TO BE IN THE LEDGE 11.10 METERS WEST OF THE SW ANCHOR BOLT OF THE LOT.
01/01/1975 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1975 (RCA) THE STATION MARK AND REFERENCE MARKS NUMBER 1 AND 2 WERE RECOVERED IN GOOD CONDITION AS DESCRIBED BY C.M.D. IN 1933. REFERENCE MARK 1 IS NOW OBSTRUCTED BY A CONCRETE BUILDING, BUT REFERENCE MARK 2 WAS OCCUPIED AND THE DISTANCE TO THE STATION WAS COMPUTED. DUE TO CHANGES IN TERRAIN AND NEW BUILDING AND HIGHWAY CONSTRUCTION, A NEW DESCRIPTION FOLLOWS. THE STATION IS LOCATED ON THE TOP OF A HIGH HILL KNOWN LOCALLY AS MOUNT ARARAT, WHICH IS ABOUT 1-1/2 MILES NORTH OF THE ANDROSCOGGIN RIVER, 8 MILES WEST OF BATH, IN THE EAST PART OF TOPSHAM, ON PROPERTY OWNED BY THE MAINE FOREST COMMISSION. TO REACH THE STATION FROM THE U.S. POST OFFICE IN TOPSHAM, GO NORTH ON U.S. ROUTE 201 FOR 0.45 MILE TO THE ENTRANCE OF THE BRUNSWICK NAVAL AIR STATION ANNEX ON THE RIGHT, TURN RIGHT AND GO EAST FOR 0.15 MILE TO THE MAIN GATE, CONTINUE STRAIGHT AHEAD ON THIS STREET (CANAM DRIVE) FOR 0.55 MILE TO ANOTHER GATE. FROM HERE CONTINUE ON CANAM DRIVE FOR 0.30 MILE TO ANOTHER GATE, GO THROUGH THE GATE AND IMMEDIATELY TURN RIGHT ONTO A DIRT TRACK ROAD, GO UPHILL ON THIS ROAD TO THE STATION LOCATED BEHIND THE CONCRETE BUILDING. THE STATION IS A STANDARD DISK STAMPED ARARAT 1933, SET IN THE TOP OF A SQUARE CONCRETE POST WHICH PROJECTS 3 INCHES ABOVE THE GROUND. IT IS 10.3 FEET SOUTHWEST OF THE SOUTHWEST CORNER OF THE BUILDING, 25.9 FEET WEST OF THE SOUTHEAST CORNER OF THE BUILDING AND 52.175 FEET SOUTH OF THE SOUTHWEST LOOKOUT TOWER LEG ANCHOR BOLT. REFERENCE MARK 1 IS A STANDARD DISK STAMPED ARARAT NO 1 1933, SET IN A DRILL HOLE IN THE CONCRETE BASE OF THE SOUTHWEST LEG OF THE LOOKOUT TOWER WHICH PROJECTS 18 INCHES ABOVE THE GROUND. REFERENCE MARK 2 IS A STANDARD DISK STAMPED ARARAT NO 2 1933, SET IN A DRILL HOLE IN OUTCROPPING BEDROCK WHICH IS FLUSH WITH THE GROUND. IT IS 46.5 FEET NORTHWEST OF THE NORTHWEST CORNER OF THE BUILDING, 50.5 FEET WEST-NORTHWEST OF THE SOUTHWEST LOOKOUT TOWER LEG ANCHOR BOLT, 21.5 FEET SOUTHWEST OF A POWER POLE AND IT IS ABOUT 2 FEET LOWER THAN THE STATION. HEIGHT OF LIGHT ABOVE STATION MARK 73.5 FEET. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN 2 MILES NORTH OF BRUNSWICK.
01/01/1975 by MEDT (GOOD)
RECOVERY NOTE BY MAINE DEPARTMENT OF TRANSPORTATION 1975 0.75 MI NE FROM TOPSHAM. ABOUT 0.25 MILE NORTH ALONG STATE HIGHWAY 201 FROM THE POST OFFICE AT TOPSHAM, THENCE 0.2 MILE NORTHEASTERLY ALONG BLACKTOP ROAD (LEADING TO MAINE SCHOOL ADMINISTRATIVE DISTRICK NO. 75 NEW UPPER SCHOOL), TO A TRACK ROAD LEADING SOUTHEASTERLY. THENCE ALONG WINDING TRACK ROAD TO TOP OF HIGH HILL, KNOWN LOCALLY AS MOUNT ARARAT, AND TO THE FIRE LOOKOUT TOWER. A DISK SET FLUSH IN THE TOP OF A CONCRETE POST 10.3 FEET SOUTHWEST OF THE SOUTHWEST CORNER OF A CONCRETE BUILDING, 25.9 FEET WEST OF THE SOUTHEAST CORNER OF THE CONCRETE BUILDING, AND 52.18 FEET SOUTH OF THE SOUTHWEST LOOKOUT TOWER LEG BOLT.
01/01/1977 by NGS (SEE DESCRIPTION)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 (ALB) THE STATION MARK AND REFERENCE MARKS NUMBER 1 AND 2 WERE RECOVERED IN GOOD CONDITION. REFERENCE MARK 1 IS NOW OBSTRUCTED BY A CONCRETE BUILDING, BUT REFERENCE MARK 2 WAS OCCUPIED AND THE DISTANCE TO THE STATION WAS COMPUTED. DUE TO ERRORS WHICH WERE FOUND IN THE 1975 RECOVERY BY R.C.A., A NEW DESCRIPTION FOLLOWS. THE STATION IS LOCATED ON PROPERTY LEASED BY THE CASCO CABLE TELEVISION. PERMISSION WAS GRANTED BY MR THOMPSON, BRUNSWICK MAINE. IT IS ON A HIGH HILL, KNOWN LOCALLY AS MOUNT ARARAT, ABOUT 1.5 MILES NORTH OF THE ANDROSCOGGIN RIVER, 8 MILES WEST OF BATH AND IN THE EAST PART OF TOPSHAM. TO REACH THE STATION FROM THE POST OFFICE IN TOPSHAM, GO NORTH ON U.S. ROUTE 201 FOR 0.45 MILE TO THE ENTRANCE OF THE BRUNSWICK NAVAL AIR STATION ANNEX ON THE RIGHT. TURN RIGHT, GO EAST FOR 0.15 MILE TO THE MAIN GATE. CONTINUE STRAIGHT ON CANAM DRIVE FOR 0.55 MILE TO ANOTHER GATE. CONTINUE ON CANAM DRIVE FOR 0.30 MILE TO ANOTHER GATE. GO THROUGH GATE TURN RIGHT, GO UPHILL ON A DIRT TRACK ROAD TO THE STATION BEHIND THE CONCRETE BUILDING. THE STATION, STAMPED---ARARAT 1933---, IS A STANDARD DISK SET IN THE TOP OF A SQUARE CONCRETE POST WHICH PROJECTS 3 INCHES ABOVE THE GROUND. IT IS 10.3 FEET SOUTHWEST OF THE SOUTHWEST CORNER OF THE BUILDING, 25.9 FEET WEST OF THE SOUTHEAST CORNER OF THE BUILDING AND 62.2 FEET SOUTH OF THE SOUTHWEST LOOKOUT TOWER LEG ANCHOR BOLT. THERE IS NO MENTION OF ANY UNDERGROUND MARK. REFERENCE MARK 1, STAMPED---ARARAT NO 1 1933---, IS A STANDARD DISK CEMENTED IN A DRILL HOLE IN THE CONCRETE BASE OF THE SOUTHEAST LEG OF THE LOOKOUT TOWER. IT IS 41 FEET NORTH-NORTHEAST OF THE NORTHWEST CORNER OF THE CONCRETE BLOCK BUILDING, 34.5 FEET EAST-SOUTHEAST OF THE UNNUMBERED POWER POLE AND IT PROJECTS 18 INCHES ABOVE THE GROUND SURFACE. REFERENCE MARK 2, STAMPED---ARARAT NO 2 1933---, IS A STANDARD DISK CEMENTED IN A DRILL HOLE IN OUTCROPPING BEDROCK. IT IS 46.5 FEET NORTHWEST OF THE NORTHWEST CORNER OF THE BUILDING, 50.5 FEET WEST-NORTHWEST OF THE SOUTHEAST LOOKOUT TOWER LEG ANCHOR BOLT, 21.5 FEET SOUTHWEST OF AN UNNUMBERED POWER POLE, FLUSH WITH THE GROUND SURFACE AND 2 FEET LOWER THAN THE STATION. THERE WAS NO SUITABLE LOCATION FOR AN AZIMUTH MARK. THE HEIGHT OF THE LIGHT ABOVE THE STATION WAS 18 METERS. DESCRIBED BY JERRY E. ELLINGWOOD.
01/01/1991 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1991 (AMW) RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in March 1998.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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