Details for Benchmark: JD0048

N 38° 57.033 W 092° 19.833 (NAD 83)

Altitude: 730.75

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

Location:
In BOONE county, MO View Original Datasheet
Designation:
COLUMBIA 1
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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Cords are a bit off for this bench mark. Very pretty when you finally find it.

[Photos:]
photoCompass phone
photoCompass phone

Didn't know you could log these on here. Now I've got something new to go searching for in addition to caches!

Found this one in good shape while geocaching.

[Photos:]
photoNice benchmark.

When I saw the photos of this benchmark, I knew I wanted to find it. Very neat setting! And there is a geocache right across the street. Visiting my elderly Mom and sister in Columbia from Portland, OR.

[Photos:]
photoStation mark JD0048
photoJD0048 in concrete block

Our Tom-Tom lead us on a merry chase and we went to a couple of different places. Made a pass or two around the building before we finally saw it. My coordinates on site N38 57.068 W092 19.839.
Old Professor - Tipton, Mo

Lovely disk mounted on an unusual stone base.

Location is the southwest corner (rear, 6th street side) of the old City Hall building at 600 E. Broadway, at the driveway.

HH2 coordinates from the current NGS datasheet: 38 57 04.14, -092 19 50.22

[Photos:]
photoCloseup, COLUMBIA 1 (JD0048), Columbia, MO
photoSetting, COLUMBIA 1 (JD0048), Columbia, MO
photoArea, COLUMBIA 1 (JD0048), Columbia, MO
View to the NNE. The disk is mounted atop the stone block next to the PERMIT PARKING ONLY sign.

The setting information for this is wrong; it's set into a square monument, not a round one. Luckily we completely overlooked that and skipped straight to the NGS directions, which were spot-on.

[Photos:]
photoOur first benchmark!

BM is in good condition.

-KingFish

N 38° 57.069 W 092° 19.837
[br]
Found this to be in good shape at the above coords.

[Photos:]
photoJD0048 from the SW
photoJD0048 - 4ft
photoJD0048 @ 2ft

still there

Checked on this one today, still there and in fantastic shape.

N 38° 57.069 W 092° 19.837

Very easy find. Can see this one from a block away. As described, set in a large carved sandstone pillar, just at the edge of a driveway.

Not a hard find

Recovery report submitted to the NGS.

[Photos:]
photoJD0048; Columbia, MO

Found it easily. Neat little pillar its on!

Couldn't be easier! And it has a very fancy post to rest on.

[Photos:]
photoJD0048, Columbia, Missouri

This is my first find. I looked it up on the internet at MU between classes and when i found out how close and easy it was i had to do it.

An easy find as Glen says. The fanciest monument for a benchmark disk that I have seen!

[Photos:]
photoJD0048 COLUMBIA 1 (MO)
photoJD0048 and Columbai, MO City Hall bldg.

I found this one last summer during a benchmark-finding spree. This BM is very nice, as it sits atop its own solid little concrete pillar, right next to 6th street in downtown Columbia. You won't need your GPS for this one, if you follow the NGS directions.

[Photos:]
photoHard to miss this one

Documented History (by the NGS)

1/1/1934 by CGS (MONUMENTED)
1/1/1946 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1946 AT COLUMBIA. AT COLUMBIA, BOONE COUNTY, 10 FEET SOUTHWEST OF THE SOUTHWEST CORNER OF THE CITY HALL, 30 FEET EAST OF THE CENTERLINE OF 6TH STREET, 19 FEET NORTH OF THE CENTERLINE OF A REAR DRIVE, 5 FEET EAST OF A LAMP POST, AND ABOUT 2 FEET ABOVE GROUND. A STANDARD DISK STAMPED COLUMBIA 1 1935 AND SET IN THE TOP OF A 14-INCH SQUARE CONCRETE POST. NOTE-- THE MARK WAS STAMPED 1934 INSTEAD OF 1935 AND THE DISK IS SET IN THE TOP OF AN 18 X 19 INCH STONE POST.

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. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • 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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