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Details for Benchmark: LM0608

N 40° 22.695 W 106° 50.991 (NAD 83)

Altitude: 7044

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

Location:
In ROUTT county, CO View Original Datasheet
Designation:
SIDNEY
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:

Reference Points

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Documented History (by the NGS)

01/01/1939 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1939 (FGJ) ON THE RIDGE OF A SMALL HILL SETTING IN THE VALLEY ABOUT 1.0 MILE SOUTH-SOUTHWEST OF THE RAILROAD STATION OF SIDNEY ON THE DENVER AND SALT LAKE RAILWAY. TO REACH FROM THE SIDNEY POST OFFICE, GO SOUTH, PASSING THE RAILROAD STATION AT 0.1 MILE, THENCE TAKE RIGHT FORK WESTERLY ON GRADED ROAD 1.05 MILE, THEN SOUTH 0.3 MILE, AND CONTINUE SOUTH AT T FOR 0.25 MILE TO RAILROAD CROSSING WHERE U.S.C. AND G.S. BM R-28 (1933), USED AS THE AZIMUTH, IS LOCATED TO THE SOUTH OF THE CROSSING AND TO THE EAST OF THE ROAD. THENCE CONTINUE 0.45 MILE TO ABOUT 200 YARDS SOUTH OF A GROUP OF FARM BUILDINGS AND TURN LEFT (EAST) THROUGH A WIRE GATE, AND CONTINUE EASTERLY AND THENCE NORTH-EASTERLY ON PLAIN TRACK-ROAD FOR 0.55 MILE, PASSING A FRAME GRANARY, AND PASS THROUGH FENCE JUST EAST THEREOF. THENCE TURN LEFT (NORTH) TO THE TOP OF THE RIDGE, THEN EAST ALONG RIDGE TO THE HIGHEST POINT, A DISTANCE OF 0.35 MILE. SURFACE, UNDERGROUND, REFERENCE AND AZIMUTH MARKS ARE STANDARD BRONZE DISKS SET IN CONCRETE. THE POINT OF THE CENTER RIDGE OF THE RAILROAD STATION SIDNEY (D. AND S.L.RY.), A FRAME BUILDING, FACING THE TRIANGULATION STATION AND ABOUT A MILE DISTANT, WAS CUT IN AS AN AZIMUTH. THE U.S.C. AND G.S. BENCH MARK IS A MORE PERMANENT AZIMUTH AND ITS LOCATION IS DESCRIBED ABOVE. THIS DESCRIPTION VARIES FROM RECONNAISANCE DESCRIPTION BECAUSE OF NECESSARY CORRECTIONS.
01/01/1982 by LOCENG (GOOD)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1982 (SRW) SIDNEY STATION MARK 1939 RECOVERED GOOD. RM NO 1 1939 RECOVERED GOOD. RM NO 2 1939 RECOVERED GOOD. AZIMUTH MARK NOT CHECKED. STAMPED STATION WITH 62002 BECAUSE IT RECEIVED MORE THAN OR EQUAL TO 80 SATELLITE PASSES.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1993.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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