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Details for Benchmark: HB1739

N 37° 25.039 W 089° 36.463 (NAD 83)

Altitude: 659

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

Location:
In CAPE GIRARDEAU county, MO View Original Datasheet
Designation:
BYRD
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:

Reference Points

Must Read!

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Found while caching in the area.

FTF! The owner very graciously walked with me into the woods behind his house and showed me both the BM and the reference marks that were nearby.

[Photos:]
photoHB1739 BYRD
photoCI3174 BYRD RM 1
photoCI3175 BYRD RM 2

Documented History (by the NGS)

01/01/1938 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1938 (CDM) ABOUT 3.5 MILES NORTHEAST OF JACKSON AND 3 MILES SOUTHEAST OF FRUITLAND, IN THE SE 1/4 SEC. 28, T. 32 N., R. 13 E. TO REACH FROM JACKSON GO EAST OF THE NORTHEAST CORNER OF THE COURTHOUSE SQUARE 0.05 MILE TO A CROSS STREET, THEN LEFT 0.3 MILE TO WHERE THE PAVEMENT TURNS RIGHT, FOLLOW RIGHT 1.7 MILES TO FORK, TAKE LEFT FORK 1.8 MILES TO FORD, GO RIGHT 0.2 MILE TO GATE, THEN PAST BARN AND CHICKEN COOP TO FIELD ROAD, FOLLOW FIELD ROAD TO GATE AT FOOT OF HILL, CONTINUE 0.25 MILE UP HILL ON ROUGH CLEARED ROAD TO TOP OF HILL AND STATION. SURFACE, UNDERGROUND, REFERENCE AND AZIMUTH MARKS ARE STANDARD BRONZE DISKS SET IN CONCRETE. REFERENCE MARK BYRD NO. 1-1938 IS LOCATED SOUTHEAST ALONG A CLEARED LINE AND AT NORTH SIDE OF A TRACK ROAD, AND PROJECTS 4 INCHES. REFERENCE MARK BYRD NO. 2-1938 IS LOCATED SOUTHWEST OF STATION ALONG A CLEARED PATH, 27 FEET NORTH OF TRAIL ROAD, 70 FEET NORTH OF FORKS, AND PROJECTS 6 INCHES. AZIMUTH MARK BYRD-1938, WHICH PROJECTS 6 INCHES, IS LOCATED NORTHEAST OF STATION. TO REACH FROM WHERE THE DESCRIPTION SAYS...TAKE LEFT FORK 1.8 MILES TO FORD, CROSS CREEK TO FORKS ON SOUTH SIDE OF LARGE FARM, GO NORTHEAST AND EAST 1.2 MILES TO CROSS ROADS AND FARM BUILDINGS, TURN RIGHT AND GO 0.2 MILE TO HOUSE ON RIGHT. MARK WHICH PROJECTS 6 INCHES IS IN NORTHWEST CORNER OF GARDEN, 17.5 FEET SOUTH OF CONCRETE PORCH EDGE AND 30.4 FEET SOUTHWEST OF SOUTHEAST CORNER OF HOUSE. HEIGHT OF LIGHT ABOVE STATION MARK-33 METERS.
01/01/1966 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1966 ABOUT 4.0 AIRLINE MILES NE OF JACKSON. T. 32. N, R. 13 E., IN SE QUARTER OF SECTION 28. ABOUT 1700 FT. NE OF TRI. STA., ABOUT 1200 FT. SE OF X-RDS., 134.6 FT. WSW AND 5.9 FT. HIGHER THAN CENTER LINE OF NW-SE RD., PRIVATE DRIVE WSW. 35.0 FT. SW OF SE CORNER AND 19.2 FT. SE OF SW CORNER OF ELMER WILKENS RESIDENCE. 28.7 FT. W OF 20 INCH MAPLE TREE. 0.6 FT. NW OF NW FENCE CORNER POST, IN TOP OF CONCRETE POST, PROJECTING 10 INCHES. STANDARD USC AND GS DISK STAMPED BYRD 1938, PAINTED AZ 627.2.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in February 2000.
  • 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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