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Details for Benchmark: AH3061

N 41° 31.100 W 090° 27.678 (NAD 83)

Altitude: 567

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

Location:
In ROCK ISLAND county, IL View Original Datasheet
Designation:
ROC74-1B
Marker Type:
metal rod
Setting:
stainless steel rod in sleve
Stability:
Most reliable and expected to hold position/elevation well.

Must Read!

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In the area today and wanted to take a look for a couple survey markers. This whole area is undergoing a ton of construction so I wasn't sure about legal parking, but I was able to find a good spot and hoof it over to this one. Very chilly day along the river. The witness post is in good shape, the same cannot be said for the rest of this mark. The whole metal top is gone (along with all id numbers) and it looks like a PVC tube has been placed around it. The rod is visible, but mostly covered my dirt and leaves.

Nice to see another one so close to a cache!

Stopped by today to check this one out. Yup, It's there! My first bench mark, Wahoo!

IowaBeaver

Found July 1,2005 This is my very first Benchmark & boy oh boy was I excited to find it. Thanx! Don't I EMail a photo to someone though?

Found as described. Description is adequate.

Knew this would be an easy one, but nonetheless, I still wandered around in the FREEZING cold for a few minutes until I found it. I was used to finding them on culvert walls, so looked all over the one nearby before accidently spying the mark.

[This entry was edited by CacheBar on Monday, June 28, 2004 at 2:30:17 AM.]

[Photos:]
photoAH3061 Dec23-03

Found this marker at the public boat ramp. Coordinate agree with my GPS.

Found this one on the way home today after finding several caches. Lots of boaters out today.

[last edit: 6/29/2003 3:10:03 PM PST]

Found this one with no trouble, I used to lauch the boat from this dock.

Found @ 1:35 p m ,I bicycle past this vary often

[last edit: 4/24/2003 5:08:17 PM PST]

Found it and photographed it. Coordinates were right on. See pictures

[Photos:]
photoAH3061 WEST
photoAH3061 EAST
photoAH3061
Ben Butterworth Parkway

Documented History (by the NGS)

01/01/1996 by SECI (MONUMENTED)
DESCRIBED BY SMITH ENG CONS INC 1996 (MGR) STATION IS LOCATED APPROXIMATELY WITHIN THE CITY LIMITS OF MOLINE NEAR THE SOUTH EDGE OF THE MISSISSIPPI RIVER. TO REACH FROM THE JUNCTION OF ILLINOIS ROUTE 92 AND ILLINOIS ROUTE 84, PROCEED WEST ALONG ILLINOIS ROUTE 92 FOR APPROXIMATELY 1.9 MI (3.1 KM) TO THE INTERSECTION OF ILLINOIS ROUTE 92 AND 55TH STREET-1ST STREET, TURN RIGHT (NORTH) ONTO 55TH STREET-1ST STREET, AND PROCEED NORTH ALONG 55TH STREET-1ST STREET FOR APPROXIMATELY 0.3 MI (0.5 KM) TO A PARKING LOT LOCATED IN THE NORTHEAST CORNER OF BEN BUTTERWORTH MEMORIAL PARKWAY. THE STATION IS LOCATED AT THE NORTHEAST CORNER OF THE PARKING LOT IN A GRASS AREA NORTH OF THE PARKING LOT, WEST OF THE BOAT LAUNCH, AND SOUTH OF THE MISSISSIPPI RIVER. TO REACH FROM THE INTERCHANGE OF INTERSTATE ROUTE 74 AND 7TH AVENUE, PROCEED EAST ALONG 7TH AVENUE FOR APPROXIMATELY 0.27 MI (0.43 KM) TO ILLINOINS ROUTE 92, TURN RIGHT (EAST) ONTO ILLINOIS ROUTE 92 AND PROCEED EAST ALONG ILLINOIS ROUTE 92 TO THE INTERSECTION OF ILLINOIS ROUTE 92 AND 55TH STREET-1ST STREET, TURN LEFT (NORTH) ONTO 55TH STREET-1ST STREET AND PROCEED NORTH ALONG 55TH STREET-1ST STREET FOR APPOXIMATELY 0.3 MI (0.5 KM) TO A PARKING LOT LOCATED IN THE NORTHEAST CORNER OF BEN BUTTERWORTH MEMORIAL PARKWAY. THE STATION IS LOCATED AT THE NORTHEAST CORNER OF THE PARKING LOT IN A GRASS AREA NORTH OF THE PARKING LOT, WEST OF THE BOAT LAUNCH, AND SOUTH OF THE MISSISSIPPI RIVER. THE STATION IS LOCATED 19.5 FT (5.9 M) EAST OF A CONCRETE CURB AND GUTTER, 18.5 FT (5.6 M) NORTH OF A CONCRETE CURB AND GUTTER, 29.0 FT (8.8 M) WEST OF A CONCRETE CURB AND GUTTER ALONG THE WEST EDGE OF THE BOAT LAUNCH, 27.4 FT (8.4 M) SOUTHEAST OF THE NORTHEAST CORNER OF THE PARKING LOT, 22.5 FT (6.9 M) WEST OF A METAL LIGHT POST NEAR THE WEST EDGE OF THE BOAT LAUNCH, 25.3 FT (7.7 M) SOUTH OF THE MISSISSIPPI RIVER, 90.3 FT (27.5 M) NORTHEAST OF A METAL LIGHT POST IN THE PARKING LOT, AND 153.3 FT (46.7 M) EAST OF A METAL LIGHT POST NORTH OF THE PARKING LOT AND SOUTH OF THE MISSISSIPPI RIVER. NOTES--ACCESS TO DATUM POINT IS THROUGH A 6-INCH LOGO CAP. PK NAILS WERE SET IN ALL WOOD PHYSICAL TIES.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in September 1998.
  • The orthometric height was determined by GPS observations and a high-resolution geoid model.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • The geoid height was determined by GEOID99.

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