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Details for Benchmark: KL0603

N 39° 34.161 W 106° 01.302 (NAD 83)

Altitude: 10801

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

Location:
In SUMMIT county, CO View Original Datasheet
Designation:
N SWAN
Marker Type:
triangulation station disk
Setting:
in a boulder
Stability:

Reference Points

Must Read!

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This benchmark is still in place and in good shape. I found the benchmark after hiking for approximately one hour and thirty minutes from the campground identified as U.S. Air Force Recreation Area (to the north of Swan Mountain) on the USGS Frisco Quadrangle. The top of Swan Mountain provides excellent views of Summit County. It was well worth the hike. There was a small glass jar next to the benchmark with an old pad of paper and pencil inside - a summit register. I believe the last logged visit to Swan Mountain was about a year ago.

Documented History (by the NGS)

01/01/1951 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1951 (WRH) THE STATION IS LOCATED ON THE NORTH END OF SWAN MOUNTAIN, A BRUSH AND TREE COVERED MOUNTAIN THAT RUNS FROM NORTH TO SOUTH. IT IS ABOUT 3 MILES AIRLINE SOUTHEAST OF DILLON, ABOUT 6 MILES AIRLINE NORTH-NORTHEAST OF BRECKENRIDGE, AND ABOUT 1 MILE EAST OF STATE HIGHWAY 9. THE STATION IS A STANDARD DMWW DISK (DENVER MUNICIPAL WATER WORKS) SET IN A DRILL HOLE IN A 1-FOOT SQUARE BOULDER THAT PROJECTS 5 INCHES. THE DISK IS STAMPED--N SWAN 1931 TRI STATION. REFERENCE MARK NUMBER ONE IS ABOUT 6 FEET LOWER THAN THE STATION. IT IS A STANDARD DISK WELDED TO THE TOP OF A 1-1/4-INCH IRON PIPE THAT IS SET IN CONCRETE AND PROJECTS 8 INCHES. THE DISK IS STAMPED--N SWAN DMWW NO 1 1951. REFERENCE MARK NUMBER TWO IS ABOUT 7 FEET LOWER THAN THE STATION. IT IS A STANDARD DISK WELDED TO THE TOP OF A 1-1/4-INCH IRON PIPE THAT IS SET IN CONCRETE AND PROJECTS 10 INCHES. THE DISK IS STAMPED--N SWAN DMWW NO 2 1951. THE AZIMUTH MARK IS LOCATED ON THE FIRST ROCKY HUMP SOUTH OF THE STATION. IT IS 10 FEET WEST OF A TRIANGULAR BLAZED 16-INCH PINE TREE AND 5 FEET NORTHEAST OF A 2-FOOT CAIRN. IT IS A STANDARD DISK SET IN A DRILL HOLE IN BEDROCK THAT PROJECTS 4 FEET. THE DISK IS STAMPED--N SWAN DMWW 1951. TO REACH THE MARK FROM THE STATION GO SOUTH ALONG THE BLAZED TRAIL FOR ABOUT 0.2 MILE TO THE FIRST ROCKY HUMP AND THE MARK. TO REACH THE STATION FROM THE POST OFFICE IN DILLON GO SOUTH ON STATE HIGHWAY 9 FOR 5.1 MILES TO A T-ROAD LEFT. TURN LEFT AS PER SIGN HIDDEN VALLEY CAMP FOR BOYS AND GO 0.7 MILE TO A TRACK ROAD SHARP LEFT, JUST AFTER CROSSING THE OLD DREDGE CUMP. TURN SHARP LEFT AND GO ABOUT 50 YARDS AND THEN TURN RIGHT AND FOLLOW THE NARROW WAGON ROAD EASTERLY, ALONG THE SOUTH SIDE OF A SMALL CREEK FOR 0.75 MILE TO AN OLD CABIN. GO NORTH FROM THE CABIN ON THE OLD WAGON ROAD FOR ABOUT 1.0 MILE OR UNTIL THERE ARE TOO MANY FALLEN LOGS IN THE ROAD TO DRIVE ANY FURTHER, AND THE END OF TRUCK TRAVEL. FROM THE END OF TRUCK TRAVEL PACK NORTH-NORTHEAST ALONG THE OLD WAGON ROAD TO A GRASSY CLEARING AND AN OLD CABIN. PASS TO THE LEFT OF THE OLD CABIN AND PICK UP THE BLAZED TRAIL AND GO UP HILL AND ALONG THE TOP TO THE NORTH END OF THE RIDGE AND THE STATION. THE PACK FROM ABOUT 1.0 MILE ABOVE THE FIRST CABIN WILL REQUIRE ABOUT 1 HOUR. HEIGHT OF LIGHT ABOVE STATION MARK 1.30 METERS.
01/01/1959 by AMS (GOOD)
RECOVERY NOTE BY US ARMY MAP SERVICE (NOW DMA) 1959 STATION, REFERENCE MARKS, AND THE AZIMUTH MARK WERE RECOVERED. A U.S. BUREAU OF RECLAMATION B.M. DISK IS SET IN THE TOP OF TREE STUMP 3.4 FEET ABOVE THE GROUND AND 7.6 FEET NORTHWEST OF THE STATION AS AN ADDITIONAL REFERENCE MARK. THE MARK IS 28 FEET NE OF A LARGE DARK EVERGREEN TREE. 26 FEET SW OF A SMALL DARK CLUSTER OF EVERGREEN TREES. 53 FEET S OF A SMALL LONE EVERGREEN TREE AND 34 FEET SE OF TIP OF BRUSH AT NE END OF CLEARING TO WEST.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1993.
  • 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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