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Details for Benchmark: SU1115

N 47° 22.331 W 114° 51.527 (NAD 83)

Altitude: 6841

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

Location:
In SANDERS county, MT View Original Datasheet
Designation:
PATRICKS KNOB
Marker Type:
triangulation station disk
Setting:
in a boulder
Stability:
May hold, but of type commonly subject to surface motion.

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Documented History (by the NGS)

01/01/1931 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1931 ORIGINAL STATION MARK A ROCK CAIRN WAS NOT RECOVERED BY USGS IN 1939. FOLLOWING IS 1939 DESCRIPTION LOCATED 6 MI. S., THENCE 1.5 MI. E. OF PLAINS. INSIDE THE BIG BEND OF CLARKS FORK AND ABOUT 4 MI. (AIRLINE) W. OF ITS JUNCTION WITH FLATHEAD RIVER. ON TOP OF PATRICKS KNOB, WHICH IS THE HIGHEST POINT IN THIS VICINITY AND VISIBLE OVER A LARGE AREA. TO REACH STATION FROM S. END OF PLAINS BRIDGE OVER CLARKS FORK, GO S. 0.3 MI., THENCE E. 0.1 MI., THENCE S. 0.2 MI. AND CONTINUE S. AT CROSSROADS 0.3 MI. AND CONTINUE S. AT T-RD. E., GO S. AND CONTINUE S. AND SE. 1 MI. AND CONTINUE ON MAIN RD. S. AT LOOP FORK, GO S. UP W. BANK OF SMALL CREEK 0.7 MI. AND TAKE LEFT FORK, GO 1.1 MI. AND TAKE RIGHT FORK, DRIVE 1.1 MI. AND TAKE TRAIL RIGHT ON PINE BENCH NEAR END OF RD., GO SW. ACROSS STREAM AND TAKE LEFT FORK OF TRAIL (TRAIL NO. 415), GO S. 3 MI. TO C. C. DIVIDE TRAIL AND TURN LEFT ON TOP 2 MI., TAKE LEFT FORK AND GO 0.5 MI. TO STATION. RECOVERED BY USGS IN 1953 AND 1956. STATION MARK--STANDARD TABLET STAMPED---PATRICKS KNOB 1939---, CEMENTED IN ROCK SET IN EARTH. REFERENCE MARK NO. 1--STANDARD REFERENCE TABLET, STAMPED---PATRICKS KNOB NO. 1 1939---, 26.73 FT. FROM STATION MARK N 46 DEGREES 00 MINUTES W. REFERENCE MARK NO. 2--STANDARD REFERENCE TABLET STAMPED---PATRICKS KNOB NO. 2 1939---, 24.27 FT. FROM STATION MARK N 09 DEGREES 20 MINUTES W.
01/01/1939 by USGS (MARK NOT FOUND)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1939 ORIGINAL STATION MARK, A ROCK CAIRN, WAS NOT RECOVERED. LOCATED 6 MI. S., THENCE 1.5 MI. E. OF PLAINS. INSIDE THE BIG BEND OF CLARKS FORK AND ABOUT 4 MI. (AIRLINE) W. OF ITS JUNCTION WITH FLATHEAD RIVER. ON TOP OF PATRICKS KNOB, WHICH IS THE HIGHEST POINT IN THIS VICINITY AND VISIBLE OVER A LARGE AREA. TO REACH STATION FROM S. END IF PLAINS BRIDGE OVER CLARKS FORK, GO S. 0.3 MI., THENCE E. 0.1 MI., THENCE S. 0.2 MI. AND CONTINUE S. AT CROSSROADS 0.3 MI. AND CONTINUE S. AT T-RD. E., GO S. AND CONTINUE S. AND SE. 1 MI. AND CONTINUE ON MAIN RD. S. AT LOOP FORK, GO S. UP W. BANK OF SMALL CREEK 0.7 MI. AND TAKE LEFT FORK, GO 1.1 MI. AND TAKE RIGHT FORK, DRIVE 1.1 MI. AND TAKE TRAIL RIGHT ON PINE BEACH NEAR END OF RD., GO SW. ACROSS STREAM AND TAKE LEFT FORK OF TRAIL (TRAIL NO.415), GO S. 3 MI. TO C. C. DIVIDE TRAIL AND TURN LEFT ON TOP, 2 MI., TAKE LEFT FORK AND GO 0.5 MI. TO STATION. STATION MARK - - STANDARD TABLET, STAMPED--- PATRICKS KNOB 1939 ---, CEMENTED IN ROCK SET IN EARTH. REFERENCE MARK NO. 1 - - STANDARD REFERENCE TABLET, STAMPED--- PATRICKS KNOB NO. 1 1939 ---, 26.73 FT. FROM STATION MARK, S 46 DEG E. REFERENCE MARK NO.2 - - STANDARD REFERENCE TABLET, STAMPED--- PATRICKS KNOB NO. 2 1939 ---, 24.27 FT. FROM STATION MARK, S 09 DEG 20 MIN E.
01/01/1968 by USGS (SEE DESCRIPTION)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1968 (RLM) NOTE BY LOLO NATIONAL FOREST - - MARKER CAPS DESTROYED. TRIANGULATION POINT IN ROCK WHICH IS LOOSE AND STILL WITHIN ORIGINAL POSITION PLUS OR MINUS .05 FT. POINT COULD BE RELOCATED IN SOLID ROCK 10 FT. TO 15. W. OF PRESENT LOCATION.

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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