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Details for Benchmark: MB2089

N 41° 37.096 W 080° 36.486 (NAD 83)

Altitude: 1191

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

Location:
In ASHTABULA county, OH View Original Datasheet
Designation:
ANDOVER
Marker Type:
triangulation station disk
Setting:
surrounded by a mass of concrete
Stability:
Mark of questionable or unknown stability.

Reference Points

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The station mark was recovered in good condition at the posted coordinates. Reference Mark 2 was recovered in good condition at N 41° 37.116 W 080° 36.481. Reference Mark 1 and the three USLS stone reference posts were all searched for and not found.
Add to description, the station mark is a standard USC and GS triangulation station disk stamped ---ANDOVER 1928--- and set in the top of a 1.1 foot by 1.1 foot concrete monument which projects 0.5 foot above the surface of the ground.
Reference Mark 2 is a standard USC and GS reference mark disk stamped ---ANDOVER NO 2 1928--- and set in the center of the top of a large irregular boulder which projects about 1.6 foot above the surface of the ground.

[Photos:]
photoMB2089(ANDOVER) - Andover Twp Ashtabula County OH
photoMB2089 - Station mark eye level
photoMB2089 - Looking NW from station mark
photoMB2089 - RM 2
photoMB2089 - RM 2 eye level
photoMB2089 - Looking N from RM 2

Documented History (by the NGS)

01/01/1876 by USLS (MONUMENTED)
DESCRIBED BY US LAKE SURVEY 1876 THIS STATION IS SITUATED ON THE HIGHEST POINT OF OWENS MOUND, IN ANDOVER TOWNSHIP, ASHTABULA COUNTY, OHIO, ABOUT 1 MILE NORTH OF THE VILLAGE OF WEST ANDOVER, AND ABOUT 2-1/2 MILES WEST OF ANDOVER RAILWAY STATION ON THE FRANKLIN DIVISION OF THE LAKE SHORE AND MICHIGAN SOUTHERN RAILWAY. THE HEIGHT OF STATION USED WAS 113 FEET. THE GEODETIC POINT IS MARKED BY A STONE POST OF THE USUAL FORM, SET 2-1/2 FEET BELOW THE SURFACE, WITH A STONE POST SET DIRECTLY OVER IT AS A SURFACE MARK. THREE STONE REFERENCE POSTS ARE SET ALONG THE FENCE SOUTH OF THE STATION, AS FOLLOWS- ONE BEARING SOUTH 73 DEG. 59 MIN. EAST, DISTANT 32.38 METERS, ONE BEARING SOUTH 4 DEG. 04 MIN. EAST, DISTANT 10.56 METERS, AND ONE BEARING SOUTH 75 DEG. 07 MIN. WEST, DISTANT 39.0 METERS FROM THE GEODETIC POINT. THE HEIGHT OF GROUND AT THE STATION ABOVE MEAN LEVEL OF LAKE ERIE IS 617.8 FEET.
01/01/1928 by USLS (SEE DESCRIPTION)
RECOVERY NOTE BY US LAKE SURVEY 1928 (WM) A STATION OF THE U.S. LAKE SURVEY ON OWENS MOUND, ABOUT 2 MILES WEST AND 0.8 MILE NORTH OF ANDOVER ON LAND OWNED BY H. H. FRITZ. STATION REMARKED BY STANDARD TABLET SET IN CONCRETE. TWO OLD U. S. LAKE SURVEY REFERENCE MARKS WERE FOUND IN GOOD CONDITION. TWO STANDARD REFERENCE MARKS WERE ESTABLISHED SET IN ROCK. A 90-FOOT STEEL TOWER USED.
01/01/1948 by USLS (SEE DESCRIPTION)
RECOVERY NOTE BY US LAKE SURVEY 1948 (FWR) STATION AND REFERENCE MARK 3 WERE FOUND, OTHERS WERE NOT SEARCHED FOR. STATION IS NOW A STANDARD USC AND GS TRIANGULATION DISK.
12/09/1993 by OHDT (GOOD)
RECOVERY NOTE BY OHIO DEPARTMENT OF TRANSPORTATION 1993 (BM) --------REPORT BY OHDT----------YEAR 1993--------CONDITION---GOOD STATION FOUND IN GOOD CONDITION. ALL 3 U.S.L.S. REFERENCE MARKS WERE FOUND. REFERENCE MARK NO. 2 WAS FOUND. REFERENCE MARK NO. 1 BELIEVED DESTROYED, A STONE WAS FOUND WITH A DRILL HOLE AT THE PROPER DISTANCE AND ANGLE BUT NO DISK LOCATED.
06/25/1996 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1996 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in April 1998.
  • 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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