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Details for Benchmark: SY2236

N 47° 28.416 W 122° 12.996 (NAD 83)

Altitude: 26

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

Location:
In KING county, WA View Original Datasheet
Designation:
EN 87 K CO 1973
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

Reference Points

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Today we did another Benchmark in Seattle to come to a total of 20 before we left for The Netherlands again. This one was number 18 and after this one we went to Canada for a couple of days. In a couple of days we will return in Seattle for the last 2 days of our holiday.
Thanks for the Benchmark. Greetz, Dutch Diggers

We found this one today. We kept on driving by here and we have wanted to stop to get a picture. Today we finally did. Mark is in good shape.

Terrible Ts

[Photos:]
photoBenchmark and GPSr.

Easily located in good condition. The description is good with these exceptions: The power pole no longer exists and People's Bank is now the Super Supplements store.

[Photos:]
photoSY2236, Renton WA

Documented History (by the NGS)

01/01/1973 by WA-033 (MONUMENTED)
DESCRIBED BY KING COUNTY WASHINGTON 1973 CITY OF RENTON POINT IS LOCATED AT THE SW CORNER OF THE INTERSECTION OF RAINIER AVE. SO AND SW 7TH ST. IT IS SET FLUSH IN THE CONC. SIDEWALK. POINT IS 3.9 FT FROM THE EDGE OF THE CURB. POINT IS 27.5 FT NORTH OF THE FACE OF A POWER POLE. POINT IS 61.5 FT SOUTH OF SW 7TH ST CENTERLINE. POINT IS 52.5 FT NW OF RAINIER AVE. SO. CENTERLINE. PEOPLES NATIONAL BANK LIES ABOUT 125 FT + OR - TO THE SW SURFACE MONUMENT--STAND K.C.S. DISK SET IN CONCR. FLUSH SUB-SURFACE MONUMENT--NONE DISK STAMPED--EN-87
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (MS) RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in December 1991.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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