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Details for Benchmark: OQ0267

N 43° 32.067 W 096° 45.767 (NAD 83)

Altitude: 1499.04

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

Location:
In MINNEHAHA county, SD View Original Datasheet
Designation:
SHERMAN RM 1
Marker Type:
reference 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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Had to search a bit with old hints and scratch the dirt off of it.

That is a tricky one to spot. Man, this park is a jackpot for benchmarks.
I had to get a bit dirty to find this one as it was covered by 1/4-1/2" of dirt

[Photos:]
photoa tad dirty

Respectfully as possible, we found it

[Photos:]
photoOQ0267 Sherman RM 1, Sioux Falls SD

Visited this place between geocaches while out on a waymark, benchmark and geocaching run with stlee. Have driven by this place multiple times but have never taken the time to stop before. Benchmark in good shape.

[Photos:]
photo100_1942

Found on the other side of the fence.

[Photos:]
photo1

Found it.

Found it.

[Photos:]
photoSHERMAN No1

Had to scratch some dirt off of this one. TFTBM!

[Photos:]
photoClubmuds Upload
photoClubmud's Upload

Logging some of my benchmarking finds for the month.

N 43° 32.082 W 096° 45.769

OK this one was not easy at all. I looked for it earlier and couldn't find it. I figured one more try. I ended up making a waypoint at the Triangulation Station and using my GPS to get me close based on the feet stated on the DataSheet.

When my GPS said I was close I saw a feature on the ground that looked suspicious. So I moved the leaves out of the way and found dirt. So I then scratched the dirt with my fingernails and found brass!!!!! WOOO HOOO! There was about a 1/4 inch of dirt covering the RM1 Mark. I was able to remove most of the dirt / mud to reveal the mark. After removing the mud I was able to read and verify the designation.

[This entry was edited by Blaise Orange on Saturday, March 28, 2009 at 4:04:06 PM.]

[Photos:]
photoOQ0267 Sherman RM1
Mark was buried under 1/4 inch of dirt and mud. I cleaned it as best I could.
photoOQ0267 Sherman RM1 Eye Level Photo
All pictures were shot facing South.
photoOQ0267 Sherman RM1 Location Shot
In the picture the mark is located just right of the vertical fence post between the 2 horizontal fence bars.

Using both coordinates and description this one has not been found - yet.

Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
01/01/1949 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1949 2.4 MI SW FROM SIOUX FALLS. 1.7 MILES WEST ALONG TWELFTH STREET FROM THE WASHINGTON HIGH SCHOOL AT SIOUX FALLS, THENCE 0.6 MILE SOUTH ALONG KIWANIS AVENUE, THENCE 0.1 MILE WEST ALONG A PARK DRIVE, AT SHERMAN PARK, ON THE EAST BLUFF OF THE BIG SIOUX RIVER, 164.5 FEET EAST OF TRIANGULATION STATION SHERMAN 1935, 118.6 FEET EAST OF A FLAGPOLE ON TOP OF THE MOST WESTERLY INDIAN MOUND (MOST WESTERLY ONE OF FOUR INDIAN MOUNDS LOCATE ON TOP OF A HILL), 14.0 FEET SOUTH OF THE CENTER LINE OF A PARK DRIVE ALONG THE NORTH SIDE OF THE INDIAN MOUNDS, AND SET IN THE TOP OF A CONCRETE POST WHICH IS FLUSH WITH THE SURFACE OF THE GROUND. NOTE-- THE NEW ROAD CONSTRUCTION HAS PROBABLY DESTROYED THE POST.
01/01/1962 by USGS (MARK NOT FOUND)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1962 MARK NOT FOUND.
05/25/1990 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1990 0.3 KM (0.2 MI) NORTHWESTERLY ALONG A PARK ROAD FROM ITS JUNCTION WITH 22ND STREET AND KIWANIS AVENUE IN SIOUX FALLS, IN SHERMAN PARK, BETWEEN THE SECOND AND THIRD INDIAN BURIAL MOUNDS, 50.1 M (164.4 FT) EAST OF THE CGS TRIANGULATION STATION SHERMAN, 36.1 M (118.4 FT) EAST OF A FLAG POLE ON TOP OF THE MOST WESTERLY 1 OF 4 INDIAN BURIAL MOUNDS, 34.5 M (113.2 FT) WEST OF A HISTORICAL SIGN, 4.3 M (14.1 FT) SOUTH OF AND LEVEL WITH THE CENTER OF THE ROAD ALONG THE NORTH SIDE OF THE MOUNDS, AND IN TOP OF A CONCRETE MONUMENT THAT IS FLUSH WITH THE GROUND SURFACE.

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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