OX0421 "D228 - 1960"

I had a few minutes while visiting Rexburg and figured I needed an Idaho mark. This one was walking distance from my hotel.

Located in the City of Rexburg, Madison County, Idaho, this USC&GS mark lies on the Rexburg - Madison County Municipal Airport property and is fairly well protected.  USC&GS mark stamped "D 228 - 1960" was found at 09:25, 23 July 2019 as described and in generally good condition. The mark is accessible from the street through a parking lot. It is adjacent to an airport building. You do not need to enter any gates. Go to description is adequate to find the mark.

Published NAD83 coordinates are located about 195 feet southeasterly of the found WGS84 coordinates. WGS84 coordinates for the mark found by 4 minute occupation with 11 strong satellites and 1 WAAS satellite.

View Original Datasheet Here

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Found Details for Benchmark: OX0421

N 43° 49.956 W 111° 48.414 (WGS 84)

Altitude: 4877

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Published Details for Benchmark: OX0421

N 43° 49.933 W 111° 48.383 (NAD 83)

Altitude: 4857.91

Coordinates may not be exact. Altitude is POSTED and location is SCALED.

Location: In Madison County, ID

Designation: D 228

Marker Type: bench mark disk

Setting: set into the top of a round concrete monument

Stability: May hold, but of type commonly subject to surface motion.

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Documented History (by the NGS)

01/01/1960 by CGS (MONUMENTED)

DESCRIBED BY COAST AND GEODETIC SURVEY 1960 1.3 MI NW FROM REXBURG. 0.85 MILE WEST ALONG WEST MAIN STREET FROM THE UNION PACIFIC RAILROAD STATION AT REXBURG, THENCE 0.45 MILE NORTH ALONG THE GRAVEL ENTRANCE ROAD AT REXBURG MUNICIPAL AIRPORT, AT THE SOUTHWEST CORNER OF A CONCRETE BLOCK ADMINISTRATION BUILDING SUPPORTING A TOWER, 2.5 FEET SOUTHEAST OF THE SOUTHWEST CORNER OF THE BUILDING, 2.1 FEET SOUTH OF THE SOUTH WALL OF THE BUILDING, 1 1/2 FEET EAST OF A POLE SUPPORTING A BEACON LIGHT, 1.8 FEET WEST OF A WITNESS POST, ABOUT LEVEL WITH THE RUNWAY, AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.3 FOOT ABOVE THE GROUND.

01/01/1983 by NGS (GOOD)

RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 RECOVERED IN GOOD CONDITION.

OX0421 "D228 - 1960" - Benchmark detail.

OX0421 "D228 - 1960" - Benchmark and GPSr.

OX0421 "D228 - 1960" - Benchmark setting and Carsonite witness post.

OX0421 "D228 - 1960" - Benchmark setting at the base of the Carsonite witness post.  The remains of the metal witness post are to the immediate right of the Carsonite post.  View north.

OX0421 "D228 - 1960" - Benchmark setting at the base of the Carsonite witness post.  The remains of the metal witness post are to the immediate right of the Carsonite post.  View northeasterly.

OX0421 "D228 - 1960" - Benchmark setting at the Rexburg, ID., Municipal Airport.  View southeasterly.

OX0421 "D228 - 1960" - Sign for the Rexburg, ID., Municipal Airport.  View north.

OX0421 "D228 - 1960" - Benchmark coordinates.

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 1992. No vertical observational check was made to the station. * This is a POSTED BENCH MARK height. Code NC indicates the bench mark was located on a no-check spur therefore a value was not computed.
• 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.