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Details for Benchmark: SS1488

N 47° 49.422 W 110° 05.053 (NAD 83)

Altitude: 2957

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

Location:
In CHOUTEAU county, MT View Original Datasheet
Designation:
LA BARGE
Marker Type:
triangulation station disk
Setting:
set into the top of a metal pipe driven into the ground
Stability:
Mark of questionable or unknown stability.

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2nd visit - overland with tools, AZ first with a nearby GLO, RM's gone to cultivation; but stick and wire pinpointed the target area. First probe clunk just a rock - 2nd the MORC TRI cap heavy wired to the MORC standpipe under two inches of sod. Did not dig for the underground MORC stone. Cap, securing bolt and standpipe for the NONPID Ft Benton west base also found today.

[Photos:]
photoMORC 1423b HOLE SUN SPOT
photoNONPID1273 FT BENTON WEST BASE 1885
photoSS1488 AZ SE
photoGLO S 16 17 20 21 1972
30 FT SOUTH OF LABARGE AZ
photoSS1488 AZ
photoSS1488 AS BUILT
REPLACED SOD FIELD STONE DUG IN SE, NE & NW
photoSS1488 TRIANGLE MARK
UNDERSIDE OF SOD
photoSS1488 1949 STICK & WIRES ESE
BETTER THAN THE MISSING RM's
photoSS1488 MORC LABARGE 1885
UNDER 2 IN OF DRIFT DIRT AND SOD

Wires connected to a 2 X 4 sight pole that when stood up was in a slight depression; but we were kayak camping the Wild & Scenic Missouri and did not have probes or digging tools.

[Photos:]
photoSS1488 LABARGE AREA

Documented History (by the NGS)

01/01/1889 by MORC (MONUMENTED)
01/01/1949 by CGS (GOOD)
DESCRIBED BY COAST AND GEODETIC SURVEY 1949 (MJT) STATION IS ABOUT 27 MILES EAST OF FORT BENTON, AND 13 MILES SOUTH AND 7-1/2 MILES EAST OF VIRGELLE, ON LAND OWNED BY J.C. ROGERS. TO REACH THE STATION FROM THE POST OFFICE IN FORT BENTON, GO EAST ACROSS THE BRIDGE SPANNING THE MISSOURI RIVER, AND CONTINUE EAST FOR 7.55 MILES TO A FORK, BEAR LEFT AND CONTINUE EAST 13.6 MILES TO A T-ROAD, TURN LEFT, GO NORTH AND EAST 6.0 MILES TO A CROSSROADS, CONTINUE EAST 1.0 MILE TO A CROSSROADS, CONTINUE EAST 1.5 MILES TO FORK, BEAR RIGHT AND CONTINUE EAST ACROSS A COULEE FOR 0.5 MILE TO A FORK, BEAR RIGHT, PASS THROUGH A GATE AND GO 0.4 MILE TO A FORK, BEAR LEFT AND GO 1.4 MILES TO J.C. ROGERS RANCH, TURN SHARP LEFT, GO NORTHEASTERLY 0.9 MILE TO A FENCE CORNER, BEAR RIGHT AND GO EASTERLY 0.5 MILE TO THE AZIMUTH MARK ON THE LEFT, TURN SHARP RIGHT, GO SOUTHEAST 0.4 MILE TO THE STATION. STATION MARK IS A STANDARD MISSOURI RIVER COMMISSION IRON CAP BOLTED TO THE TOP OF A 5-INCH IRON PIPE THAT PROJECTS 8 INCHES. REFERENCE MARK NO. 1 PROJECTS 6 INCHES AND THE DISK IS STAMPED LA BARGE MORC NO 1 1949. REFERENCE MARK NO. 2 PROJECTS 8 INCHES AND THE DISK IS STAMPED LA BARGE MORC NO 2 1949. THE AZIMUTH MARK IS APPROXIMATELY 0.4 MILE FROM THE STATION AND 2 FEET WEST OF A FENCE CORNER. THE MARK PROJECTS 6 INCHES AND THE DISK IS STAMPED LA BARGE MORC 1949. ALL MARKS EXCEPT THE STATION MARK ARE STANDARD DISKS SET IN THE TOPS OF 12-INCH SQUARE CONCRETE POSTS. A 4 FOOT STAND AT LA BARGE (MO.RC) WILL SEE 4 FOOT STANDS AT CITADEL (MO.RC), DOME AND SAGE.
01/01/1949 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1949 STATION MARK--STANDARD MORC IRON CAP BOLTED TO THE TOP OF A 5 IN. IRON PIPE THAT PROJECTS 8 IN.

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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