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Details for Benchmark: MG0023

N 41° 30.900 W 090° 28.167 (NAD 83)

Altitude: 571.15

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

Location:
In ROCK ISLAND county, IL View Original Datasheet
Designation:
W 52
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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EZ PZ on top of concrete wall under the large pipe.??
Thanks to hempmage for the better coords and moving some rock!??????

I started my day by grabbing a couple of benchmarks. I had to dig out the dirt covering it

IowaBeaver

[Photos:]
photoIowaBeaver Finds Benchmark MG0023

I was practicing social distancing while visiting some benchmark locations in the Quad Cities today. This was my last stop of the day. Since Hempmage visited this location last fall and dug out the benchmark, I was hopeful that it would still be viable. That was not the case at all. I got to GZ and fresh rock had been dumped everywhere. Fortunately, these benchmark placements are fairly standard, so I knew right where to dig. After a bit of digging, I found the edge of the benchmark. But the more that I dug, the more rocks came tumbling down onto the beacon. So it took a lot of work to clear the rocks away enough to get a good picture. (Hempmage's coordinates were perfect!)

[Photos:]
photoMG0023

N 41° 30.879 W 090° 28.162
I had to run an errand in Moline today, which took much less time than expected. What to do before heading to work? How about a benchmark? I looked through a couple before spotting this one, seemed like a challenge but a possibility. Found much closer (semi-legal) parking than expected and hoofed it a few hundred feet to GZ. Searched around for a while before taking a look at one of the older photos which gave me a better idea of the location (I also should have read the description better!) But I only found rocks and dirt in that spot. Time to dig! After a bit of work I saw a glint of the disc and soon had it free of debris. Awesome! This was a lot of fun. I may have to do more local benchmarks (this is only my 9th total). Now, off to work to clean all this mud off of me!

[Photos:]
photoW 52

N41° 30.883, W90° 28.159
I found this W52 benchmark about 25-30 feet from the listed coordinates. Contrary to previous finders, I had easy access. I rode my bike right up to it, although the gravel in the road bed was a bit larger and a bit looser than I prefer.

I also noticed the yellow paint from previous photos is gone. Obviously, its not that "weather-beater" stuff You see advertised.

[Photos:]
photoDisk and GPSr on 18 July, 2004
N 41° 30.880 W 090° 28.160

This wasn't a walk in the park. Went to marina parking lot as that looked to be the best access point according to map, but realized that GPS was showing too long a distance across road.
Looking past the RR tracks, I saw what looked to be a road on the other side, so drove around and found it. It wasn't really a road, as the last hundred feet or so was rutted mud and huge piles of cut up trees of every size, shape, and description. There was a log across the road at the end, so parked and hiked among the mountains of wood. GPS showed mark to be in one of the piles! I started back, then decided to at least look along the tracks. I had no idea where to go at this point, but saw a flood control station near the tracks and made my way towards it.
In a row nearest the RR tracks is placed some of the most enormous slices of trees I've ever seen! Literally 8-9 ft in diameter! They must have been nearly 200 years old when they were hacked down.
I had to cross a VERY steep and rocky ditch to get to the station, and then noticed a box culvert north across the RR bed and saw the well marked benchmark there. GPS showed the original coordinates to be nearly 300 ft away.
Hope the new coordinates I posted will help. They're ones I arrived at from averaging several.
Once there, I realized I'd actually seen this one a few years back while riding my bike along the tracks.

[last edit: 12/23/2003 1:10:02 PM PST]

[last edit: 12/23/2003 1:11:50 PM PST]

[Photos:]
photoMG0023(3)
Close-up
photoMG0023(2)
GPS showing how far the actual mark is from it's reported position.
photoMG0023(1)
The creek looks like a nice place for a frosty dip. YIKES! The above are the coordinates I got from averaging several.

No orange paint or stakes for me, so I didn't see it. My GPS kept pointing me to the South side of the road, no matter how I approached it. Even tried looking on the North Side.

[Photos:]
photoHeinrich
This is where it should be, according to my GPS.

Found this one on the way home today after finding several caches. Can't miss the orange paint.

N 41° 30.878 W 090° 28.160

They must be doing some surveying in the area, this one was well marked with orange paint and a lathe with a ribbon on it.

Found @ 2:15 pm,coordinates were differant,mine were N .883 W.159

Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 1.3 MI W FROM EAST MOLINE. 1.3 MILES WEST ALONG THE CHICAGO, ROCK ISLAND AND PACIFIC RAILWAY FROM THE STATION AT EAST MOLINE, ROCK ISLAND COUNTY, ONE-HALF POLE WEST OF POLE C 176+48, AT A CONCRETE BRIDGE, IN THE CENTER OF THE TOP OF THE NORTH CONCRETE HEADWALL, AND LEVEL WITH THE TRACK. A STANDARD DISK, STAMPED W 52 1934.
08/16/1996 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1996 RECOVERED IN GOOD CONDITION.
06/06/1997 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1997 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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