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Details for Benchmark: MB1706

N 41° 56.450 W 080° 32.717 (NAD 83)

Altitude: 660.79

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

Location:
In ASHTABULA county, OH View Original Datasheet
Designation:
U 321
Marker Type:
metal rod
Setting:
stainless steel rod
Stability:
Probably hold position/elevation well.

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It's still there. Didn't have the GPSr since this one is in my neighborhood and we walked to it.

The mark is in good condition at N 41° 56.472 W 080° 32.745.

[Photos:]
photoMB1706(U 321) - Conneaut OH
photoMB1706 - cover open
photoMB1706 - Looking N on Old Main Rd.
photoMB1706 - Looking E from mark
photoMB1706 - Looking W from mark
photoMB1706 - Looking S on Old Main Rd.

Documented History (by the NGS)

01/01/1981 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1981 IN CONNEAUT. IN CONNEAUT, AT THE JUNCTION OF OLD MAIN ROAD AND SALEM ROAD, 0.58 KILOMETER (0.35 MILE) WEST-SOUTHWEST OF THE SOUTHWEST END OF THE OLD MAIN ROAD BRIDGE OVER CONNEAUT CREEK, THE MARK IS AT THE NORTHWEST CORNER OF THE LAWN OF HOUSE 374 OLD MAIN ROAD, 9.14 METERS (30.0 FEET) EAST OF THE CENTER OF OLD MAIN ROAD, 20.72 METERS (68.0 FEET) NORTHWEST OF THE NORTHWEST CORNER OF HOUSE 374, 7.92 METERS (26.0 FEET) SOUTH OF THE CENTER OF SALEM ROAD AND 4.26 METERS (14.0 FEET) EAST-SOUTHEAST OF POWER POLE 196284. THE MARK IS ABOVE LEVEL WITH THE ROAD.
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (KB) RECOVERED IN GOOD CONDITION.
11/05/1993 by OHDT (GOOD)
RECOVERY NOTE BY OHIO DEPARTMENT OF TRANSPORTATION 1993 (BM) RECOVERED IN GOOD CONDITION.
07/04/1996 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1996 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • 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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