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Details for Benchmark: NJ0541

N 42° 01.933 W 091° 35.850 (NAD 83)

Altitude: 849.71

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

Location:
In LINN county, IA View Original Datasheet
Designation:
U 80
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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According to a Marion website.
When the 100-year-old brick depot faced demolition in 1988, Marion residents joined together to save a portion of this structure that symbolized so much of Marion's history. People from all over Marion came together to salvage 19,000 bricks from the original train depot. The depot pavilion in City Square Park was re-created using these bricks along with the original depot roof.

If possible I will track down the contruction company that may have been involved with the reconstruction and see if they know what happened to the mark.

It is no longer at location.

[Photos:]
photoMarion, Iowa Restored Depot

Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 AT MARION. AT MARION, LINN COUNTY, IN THE BRICKWALL OF THE CHICAGO, MILWAUKEE, ST. PAUL AND PACIFIC RAILROAD STATION, BETWEEN THE TICKET OFFICE WINDOWS, AND 5 FEET HIGHER THAN THE TRACK. A STANDARD DISK, STAMPED U 80 1934 AND SET VERTICALLY.
05/04/1994 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1994 MARK NOT FOUND.

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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