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Details for Benchmark: SY5574

N 47° 47.238 W 122° 54.105 (NAD 83)

Altitude: 2762

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

Location:
In JEFFERSON county, WA View Original Datasheet
Designation:
MT WALKER
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

Must Read!

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A serendipitous find on an unplanned side trip today. It still looks like it get regularly polished.

[Photos:]
photoMT WALKER, SY5574, 1, 20140704

Found this mountaintop mark with GeoBarista on a Sunday afternoon hunt. While in the area we located the last vestige of the ols Mt Walker Lookout, a leftover of the good old days when antone could apply to spend their summer in a tower spotting fires.We also grabbed a nordic puzzle/offset cache, climbed down about 1200 feet to grab the Walker Walkabout cache and back up again. We generally got a nice workout. The mark still looks like someone from the ACofE treks up here occasionally to polish the brass. What's up with that?

Benchmark is in excellent shape, and looks almost new. I averaged my GPSr for ten minutes at the spot, and the coordinates appear to be almost 30 feet off.

[Photos:]
photoMt Walker Benchmark

Documented History (by the NGS)

1/1/1955 by USE (MONUMENTED)
DESCRIBED BY US ENGINEERS 1955 (LSB) THE STATION IS LOCATED ABOUT 28-1/2 MILES, AIR LINE, NORTH-NORTHEAST OF HOODSPORT AND 3 MILES, AIR LINE, SOUTH-SOUTHWEST OF QUILCENE. IT IS ON THE HIGHEST POINT OF WHAT IS LOCALLY KNOWN AS MOUNT WALKER. TO REACH THE STATION FROM THE POST OFFICE IN QUILCENE, GO SOUTH ON U.S. HIGHWAY 101 FOR 5.3 MILES TO A DIRT ROAD LEFT AND SIGN MT. WALKER SUMMIT 5 MILES. TURN LEFT AND FOLLOW THE DIRT ROAD FOR 0.35 MILE TO A FORK AND SIGN MT. WALKER L.O. TAKE THE RIGHT FORK AND FOLLOW THE WINDING ROAD UP THE MOUNTAIN FOR 4.0 MILES TO A T-INTERSECTION. TURN RIGHT, AS PER SIGN SOUTH POINT, AND GO 0.15 MILE TO THE STATION ON THE LEFT. THIS IS A DRIVE STATION. THE STATION MARK, A U.S. ARMY ENGINEERS BRONZE DISK STAMPED MT WALKER, IS SET IN THE TOP OF SMALL CONCRETE CYLINDER WHICH PROJECTS 2 INCHES ABOVE THE GROUND. IT IS 44 FEET SOUTH-SOUTHEAST OF A TRIANGLE BLAZE ON A TREE AND 30 FEET EAST OF THE ROAD. REFERENCE MARK 1, A U.S. ARMY ENGINEERS MAP CONTROL STATION MARK STAMPED REF NO 1, IS SET IN THE TOP OF A SMALL CONCRETE CYLINDER WHICH IS FLUSH WITH THE GROUND. THE MARK IS 21 FEET WEST OF THE CENTER OF THE ROAD AND 3 FEET SOUTH-SOUTHEAST OF A BLAZED TREE. THE MARK IS ABOUT 3 FEET LOWER THAN THE STATION MARK. REFERENCE MARK 2, A STANDARD DISK STAMPED MT WALKER USE NO 2 1955, IS SET IN THE TOP OF A SQUARE BLOCK OF CONCRETE WHICH IS FLUSH WITH THE GROUND. THE MARK IS 12 FEET NORTH OF THE CENTER OF THE ROAD AND IS ABOUT 2 FEET LOWER THAN THE STATION MARK. NO AZIMUTH MARK WAS SET, AS THERE IS NO PLACE TO SET ONE THAT WOULD SEE FROM THE GROUND.
1/1/1961 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (MEW) THE STATION AND REFERENCE MARKS WERE RECOVERED IN GOOD CONDITION, AS DESCRIBED. THE STATION IS SURROUNDED BY TREES AND CANNOT BE USED WITHOUT A TOWER AT LEAST 50 FEET HIGH.
1/1/1963 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1963 (FN) THE STATION AND REFERENCE MARKS 1 AND 2 WERE RECOVERED IN GOOD CONDITION AS DESCRIBED BY L.S.B. IN 1955.

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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