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Details for Benchmark: SY1624

N 47° 37.014 W 123° 01.446 (NAD 83)

Altitude: 2777

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

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

Reference Points

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with Tim J on a hike to this old lookout site. We also found WEBB MTN Reference Mark NO 4 1955 1973

[Photos:]
photoWEBB MTN Station Mark 1955
photoWEBB MTN Reference Mark No 4 1955 1973

Documented History (by the NGS)

1/1/1955 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1955 (LSB) THE STATION IS LOCATED ABOUT 5.5 MILES NORTH OF ELDON AT THE MOUTH OF THE HAMMA HAMMA RIVER, 2.5 MILES WEST OF THE WEST SHORE OF HOOD CANAL, AND AT THE WEBB LOOKOUT OF THE U.S. FOREST SERVICE. TO REACH FROM THE POST OFFICE IN HOODSPORT, GO NORTH ON U.S. HIGHWAY 101 FOR 11.9 MILES TO A BRIDGE OVER THE HAMMA HAMMA RIVER. CONTINUE NORTHERLY ON U.S. HIGHWAY 101 FOR 2.1 MILES TO A SIDE ROAD LEFT. TURN LEFT, WEST, AS PER SIGN HAMMA HAMMA RANGER STATION, HAMMA HAMMA FOREST ROAD, AND GO 2.5 MILES ON A GRAVEL ROAD TO A FORK. TURN RIGHT AS PER SIGN WEBB L O 8, KEEP MAIN ROAD FOR 5.8 MILES TO A SWITCHBACK, AND A SIGN WEBB L O 2.5. TURN SHARP RIGHT ON THE SWITCHBACK AND GO 1.2 MILES TO A FORK AND SIGN WEBB L O 1.5. TURN LEFT AND GO 1.1 MILES TO THE LOOKOUT HOUSE AND THE STATION. THE STATION MARK IS A STANDARD DISK STAMPED WEBB MTN 1955. IT IS SET IN A SQUARE CONCRETE POST, FLUSH WITH THE GROUND, AND IS 10 FEET EAST NORTHEAST OF THE NORTHEAST CORNER OF THE LOOKOUT HOUSE. REFERENCE MARK 1 IS A STANDARD DISK STAMPED WEBB MTN NO 1 1955. IT IS SET IN A ROUND CONCRETE POST PROJECTING 3 INCHES ABOVE THE GROUND, AND 1 FOOT LOWER THAN THE STATION. THE MARK IS 9 FEET EAST OF THE LOOKOUT HOUSE. REFERENCE MARK 2 IS A STANDARD U.S. GEOLOGICAL SURVEY REFERENCE MARK DISK STAMPED WEBB 1944 2. IT IS SET IN A DRILL HOLE IN A BOULDER THAT PROJECTS 4 INCHES ABOVE THE GROUND. THE MARK IS 11 FEET NORTHWEST OF THE NORTHWEST CORNER OF THE LOOKOUT HOUSE. THE AZIMUTH MARK IS A STANDARD DISK STAMPED WEBB MTN 1955. IT IS SET IN A ROUND CONCRETE POST PROJECTING 2 INCHES ABOVE THE GROUND. THE MARK IS 28 FEET SOUTH SOUTHWEST OF THE CENTER OF THE ROAD, AND 1 FOOT WEST OF A WHITE WITNESS POST. TO REACH THE AZIMUTH MARK FROM THE STATION GO SOUTHERLY DOWN THE LOOKOUT ROAD FOR 0.2 MILE TO THE AZIMUTH MARK ON THE RIGHT, WEST SIDE OF THE ROAD.
1/1/1967 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1967 (HJS) THE STATION, REFERENCE MARKS AND AZIMUTH MARK WERE RECOVERED IN GOOD CONDITION AS DESCRIBED. THE TO REACH DESCRIPTION IS ADEQUATE EXCEPT THE BRIDGE OVER THE HAMMA HAMMA RIVER IS 12.9 MILES AS PREVIOUSLY DESCRIBED. TO REACH THE AZIMUTH MARK FROM THE STATION, GO DOWNHILL ALONG THE LOOKOUT ROAD FOR 0.4 MILE AND AZIMUTH MARK ON THE RIGHT ON THE OUTSIDE OF A HAIRPIN CURVE IN THE ROAD.
1/1/1973 by NGS (MONUMENTED)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1973 (CLN) THE STATION MARK WAS RECOVERED IN GOOD CONDITION. THE CONCRETE POST WHICH HELD REFERENCE MARK NO. 1 DISK WAS FOUND TILTED, AND WITH THE DISK MISSING. REFERENCE MARK NO. 2 AND THE AZIMUTH MARK WERE NOT FOUND. TWO NEW REFERENCE MARKS WERE ESTABLISHED. THE STATION IS ABOUT 5.5 MILES NORTH OF ELDON, WHICH IS AT THE MOUTH OF THE HAMMA HAMMA RIVER. 2-1/2 MILES WEST OF THE WEST SHORE OF HOOD CANAL, AND ON THE SUMMIT OF WEBB MOUNTAIN AT THE FORMER SITE OF A LOOKOUT HOUSE, WHICH HAS BEEN TORN DOWN. REACHED FROM THE POST OFFICE IN HOODSPORT BY GOING NORTHERLY ON U.S. HIGHWAY 101 FOR 11.8 MILES TO THE NORTHERN ONE OF TWO CONCRETE BRIDGES OVER THE HAMMA HAMMA RIVER, CONTINUE NORTHERLY ON HIGHWAY 101 FOR 1.9 MILES TO A GRAVEL SIDE ROAD LEFT AND A SIGN HAMMA HAMMA FOREST SERVICE STA 6 FT, TURN LEFT AND GO 2.4 MILES, KEEP RIGHT FORK 5.6 MILES TO A T-INTERSECTION, TURN SHARP RIGHT AND GO 1.35 MILES TO A REVERSE Y, TURN SHARP LEFT AND FOLLOW ROAD UPHILL FOR 0.65 MILE TO THE FLAT SUMMIT OF THE MOUNTAIN AND THE STATION. THE STATION MARK, STAMPED WEBB MTN 1955, IS A STANDARD DISK SET IN A SQUARE CONCRETE POST WHICH PROJECTS 1 INCH. IT IS ON THE SOUTHEASTERN PART OF THE SUMMIT, 18 FEET NORTH OF A 2-FOOT HIGH ROCK RETAINING WALL AND 4 FEET NORTH-NORTHWEST OF A METAL WITNESS POST. REFERENCE MARK NO. 3, STAMPED WEBB MTN 1955 NO 3 1973, IS A STANDARD DISK SET IN A ROUND CONCRETE POST WHICH PROJECTS 2 INCHES. IT IS ON THE SOUTHWESTERN PART OF THE SUMMIT AND 4 FEET NORTHEAST OF THE ROCK RETAINING WALL. REFERENCE MARK NO. 4, STAMPED WEBB MTN 1955 NO 4 1973, IS A STANDARD DISK SET IN A ROUND CONCRETE POST WHICH PROJECTS 4 INCHES. IT IS 3 FEET SOUTHWEST OF THE NORTHEAST EDGE OF THE SUMMIT AND ABOUT 1 FOOT HIGHER THAN THE STATION MARK. OBJECTS IN THE BOX SCORE OR OTHER OBJECTS IN SEATTLE WILL SERVE AS AN AZIMUTH MARK. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN 5-1/2 MILES NORTH OF ELDON.
1/1/1982 by WADNR (GOOD)
RECOVERY NOTE BY WA DEPT OF NAT RES 1982 (MBH) WEBB MTN 1955 RECOVERED GOOD. WEBB MTN 1955 NO. 3 1973 RECOVERED GOOD. WEBB MTN 1955 NO. 4 1973 RECOVERED GOOD.

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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