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Details for Benchmark: SY5685

N 47° 34.850 W 122° 08.383 (NAD 83)

Altitude: 344.82

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

Location:
In KING county, WA View Original Datasheet
Designation:
BEL 19
Marker Type:
bolt
Setting:
footings/foundation walls of small/medium structures
Stability:
May hold, but of type commonly subject to surface motion.

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Out on a walk at lunch and found some benchmarks. As described in the datasheet.

[Photos:]
photo
photo

Located as described in the data sheet, an easy find. All descriptions for the site remain the same. Easy pick.

Easily found as described. BM 19 has been written on the pole. Parking is available in the Eastgate shopping mall.

[last edit: 9/19/2003 8:47:50 PM PST]

[Photos:]
photoSY5685, Bellevue WA

Documented History (by the NGS)

01/01/1990 by WA0109 (MONUMENTED)
DESCRIBED BY CITY OF BELLEVUE WASHINGTON 1990 THE STATION IS LOCATED ABOUT 19.3 KM (12.0 MI) NORTH OF RENTON, 16.1 KM (10.0 MI) EAST OF SEATTLE, 8.0 KM (5.0 MI) SOUTH OF REDMOND AND ON STREET RIGHT-OF-WAY. TO REACH FROM THE INTERESECTION OF INTERSTATE HIGHAY 405 AND NORTHEAST 8TH STREET IN BELLEVUE, GO EAST ON NORTHEAST 8TH STREET FOR 3.54 KM (2.20 MI) TO THE INTERSECTION OF 148TH AVENUE NORTHEAST. TURN RIGHT AND GO SOUTH ON 148TH AVENUE NORTHEAST AND THEN 150TH AVENUE SOUTHEAST FOR 4.02 KM (2.50 MI) TO THE INTERSECTION OF 150TH AVENUE SOUTHEAST AND EASTGAE WAY AND THE STATION ON THE LEFT. THE MARK IS AN X CUT IN THE TOP OF THE SOUTHWEST BOLT IN THE BASE OF THE TRAFFIC SIGNAL IN THE NORTHEAST ANGLE OF THE INTERSECTION OF 150TH AVENUE SOUTHEAST AND EASTGATE WAY.

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 October 1996.
  • 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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