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Details for Benchmark: SS1486

N 47° 50.588 W 110° 02.632 (NAD 83)

Altitude: 3215

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

Location:
In CHOUTEAU county, MT View Original Datasheet
Designation:
CITADEL
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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RM 1 & 2, added in 1949, were also found. AZ not looked for.

[Photos:]
photoSS1486 MORC CITADEL SW
photoSS1486 CITADEL RM 1
photoSS1486 CITADEL RM 2
photoSS1486 CITADEL
4 FOOT STAND WOULD BE A BIT SHAKY NOW.

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) THE STATION IS LOCATED ABOUT 26 MILES SOUTH-SOUTHEAST OF BIG SANDY, ON THE HIGHEST POINT OF A PROMINENT KNOLL OVERLOOKING THE MISSOURI RIVER TO THE SOUTH, AND 8 FEET SOUTH OF A WITNESS POST. TO REACH THE STATION FROM THE POST OFFICE IN BIG SANDY, GO EASTERLY ON THE MAIN STREET FOR 0.2 MILE. THEN RIGHT, SOUTHERLY, FOR 1.9 MILES TO A FORK. THEN RIGHT ROAD FOR 4.95 MILES TO A FORK. THEN LEFT ROAD FOR 2.7 MILES TO A FORK. THEN RIGHT ROAD FOR 3.3 MILES TO A T INTERSECTION. THEN LEFT FOR 5.6 MILES TO A FORK, THEN LEFT ROAD FOR 8.9 MILES TO AN INTERSECTION OF 5 ROADS. TURN RIGHT, WEST, ON A MAIN TRAVELED GRADED DIRT ROAD FOR 2.0 MILES TO A T INTERSECTION. THEN LEFT, SOUTH, FOR 1.0 MILE TO A SIDE ROAD ON THE RIGHT. THEN RIGHT, WEST, FOR 1.0 MILE. THEN RIGHT, NORTHERLY, FOR 0.7 MILE TO A SIDE ROAD ON THE LEFT. THEN LEFT, (WEST, SOUTH THEN WEST) FOR 2.8 MILES TO A SCHOOL HOUSE ON THE RIGHT. CONTINUE WEST FOR 1.7 MILES TO A SIDE ROAD ON THE LEFT (ABOUT 100 YARDS EAST OF A WIRE GATE). THEN LEFT, SOUTHERLY, FOR 1.6 MILES TO A WIRE GATE. THEN THROUGH GATE, CONTINUE ON A TRACK ROAD FOR 0.7 MILE TO A FORK AND A WIRE GATE ON THEN RIGHT. THEN RIGHT ROAD, THROUGH GATE, FOR 1.0 MILE TO A GATE. PASS THROUGH GATE, CONTINUE ON THE MAIN TRAVELED TRACK ROAD FOR 0.9 MILE TO THE AZIMUTH MARK ON THE RIGHT AS DESCRIBED. CONTINUE FOR 0.05 MILE TO A GATE. THEN THROUGH GATE FOR 0.2 MILE TO THE SOUTH SIDE OF THE STATION HILL AND THE NORTHEAST CORNER OF A CULTIVATED FIELD. THEN BEAR TO THE RIGHT FOR 0.1 MILE. THEN RIGHT FOR 0.5 MILE TO THE HIGHEST POINT OF THE HILL AND THE STATION AS DESCRIBED. (A TRUCK WITH 4-SPEED TRANSMISSION IS NECESSARY TO DRIVE FROM THE EDGE OF THE CULTIVATED FIELD TO THE STATION). THE STATION MARK IS A MISSOURI RIVER COMMISSION CAST IRON CAP (UNSTAMPED) WITH A RAISED TRIANGLE IN ITS APPROXIMATE CENTER, BOLTED TO THE TOP OF A 4-INCH IRON PIPE THAT PROJECTS 6 INCHES. REFERENCE MARK NO. 1 IS 52.5 FEET SOUTHEAST OF THE WITNESS POST AND ABOUT 3 FEET LOWER THAN THE STATION. IT PROJECTS 8 INCHES, AND THE DISK IS STAMPED CITADEL MO.R.C. NO 1 1949. REFERENCE MARK NO. 2 IS 39.0 FEET WEST-SOUTHWEST OF THE WITNESS POST AND AT ABOUT THE SAME ELEVATION AS THE STATION. IT PROJECTS 6 INCHES, AND THE DISK IS STAMPED CITADEL MO.R.C. NO 2 1949. THE AZIMUTH MARK IS APPROXIMATELY 0.3 MILE FROM THE STATION, ABOUT 100 YARDS SOUTH OF THE SOUTH EDGE OF AN EARTH DAM, ABOUT 100 YARDS NORTH-NORTHWEST OF A FENCE CORNER, 95 FEET WEST OF THE APPROXIMATE CENTER OF A TRACK ROAD, AND 7 FEET NORTH OF A WITNESS POST. IT PROJECTS 6 INCHES, AND THE DISK IS STAMPED CITADEL MO.R.C. 1949. THE AZIMUTH MARK AND THE REFERENCE MARKS ARE STANDARD DISKS SET IN THE TOPS OF 12-INCH SQUARE CONCRETE POSTS. A 4 FOOT WOODEN STAND AT CITADEL (MO. R C) WILL SEE A 4-FOOT WOODEN STAND AT SAGE AND A 4-FOOT WOODEN STAND AT LA BARGE (MO. R C).
01/01/1949 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1949 RECOVERED BY NGS IN 1949. DESCRIPTION AND POSITION LISTED IN NGS QUAD 47110-1, STATION 1003. STATION MARK--A MORC CAST IRON CAP, UNSTAMPED, WITH A RAISED TRIANGLE IN ITS APPROXIMATE CENTER, BOLTED TO THE TOP OF A 4 IN. IRON PIPE, PROJECTING 6 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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