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Details for Benchmark: RX0963

N 46° 57.958 W 113° 00.499 (NAD 83)

Altitude: 4334

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

Location:
In POWELL county, MT View Original Datasheet
Designation:
BROWNS LAKE
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

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From RX0489, I followed the dirt road almost to location. BM is still leaning slightly south. No witness post, however, none is needed to find.

[Photos:]
photoRX0963

Found as described and in good condition. Very slightly tipped to the south.

[Photos:]
photoBrowns Lake Near Ovando, MT.
I have seen only one other cap like this. Notice that the date was 190_ so that the other single didget could be added. Here comes 1956 and they still have some of these caps to use. Also note that the triangle is cut into the cap with a chisel. The other cap that I have seen was called BATTLE, south of here about 100 air miles.
photoBrowns Lake Looking SW
Notice the angle of the pipe which supports the monument.

Located as described.

[This entry was edited by bynumlk on Monday, June 07, 2004 at 7:36:45 PM.]

Documented History (by the NGS)

01/01/1956 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1956 (WFD) THE STATION IS LOCATED ABOUT 200 YARDS NORTHWEST OF BROWNS LAKE, ABOUT 16 MILES NORTH-NORTHEAST OF DRUMMOND, AND 15.5 MILES WEST OF LINCOLN. THE MARK IS A STANDARD U.S. FOREST SERVICE DISK WELDED TO THE TOP OF A 1-1/2 INCH COPPER PIPE. THE MARK PROJECTS ABOUT 10 INCHES, AND THE DISK IS STAMPED BROWNS LAKE 1956. THE POINT INTERSECTED WAS THE TOP OF A 12 FOOT TARGET.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in July 1992.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)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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