Details for Benchmark: SQ0363
N 47° 28.800 W 107° 53.033 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In PHILLIPS county, MT View Original Datasheet
- U 277
- Marker Type:
- bench mark disk
- set into the top of a round concrete monument
- May hold, but of type commonly subject to surface motion.
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||kayakbird posted a note for SQ0363
DS L/L way, way off from best estimate of call distance along the Musselshell Ferry Rd and mark should be eleven feet under water.
Revisit 10 July 10. Found evidence of a wagon road climbing straight north from the estimated position of the Musselshell Ferry to the top of the UL Bend which if fairly flat at least to the 2.2 mile distance call. There is no evidence of a gate or a fence anywhere near the DS L/L. This road may have been used seasonally when the river bottom route was flood. Double teaming would have been required on part of the grade.
Mark is most likely underwater on the west side of the UL Bend.
This entry was edited by kayakbird on Monday, 12 July 2010 at 18:47:30.
[Photos:]LEGG 1926 MONTANA ROAD MAP
NOTE HIGHWAY POSITION GOING SOUTH TO THE MUSSELSHELL FERRY
LEGG POST OFFICE LOCATIONS
OPENED 1917 - CLOSED 1936
LEGG PO 1, 2 & 3
Documented History (by the NGS)
|01/01/1935 by CGS (MONUMENTED)
|DESCRIBED BY COAST AND GEODETIC SURVEY 1935
2.1 MI NW FROM MUSSELSHELL FERRY. 2.1 MILES NORTHWEST ALONG A ROAD LEADING TO THE WILDER-LEGG ROAD FROM MUSSELSHELL FERRY, PHILLIPS COUNTY, AT A FENCE CROSSING, 27 FEET SOUTHWEST OF THE CENTER OF THE GATE, AND 3 FEET EAST OF A FENCE CORNER. A STANDARD DISK, STAMPED U 277 1935 AND SET IN THE TOP OF A CONCRETE POST. NOTE-- BM UNDERWATER.
|01/01/1965 by USGS (MARK NOT FOUND)
|RECOVERY NOTE BY US GEOLOGICAL SURVEY 1965
MARK NOT FOUND.
- The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
- The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
- The geoid height was determined by GEOID99.
- The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
- The modeled gravity was interpolated from observed gravity values.