Skip to Content

Details for Benchmark: MJ1131

N 41° 35.367 W 094° 57.553 (NAD 83)

Altitude: 1480

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

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

Reference Points

Must Read!

Benchmarks may be on private property or in dangerous locations. Obey local laws. By using the services on Geocaching.com you agree to this disclaimer.

Documented History (by the NGS)

01/01/1930 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1930 (FLG) STATION IS ABOUT 9 MILES S OF AUDUBON, 4 MILES W OF EXIRA, AND 1/4 MILE SW OF THE ST. JOHNS DANISH CHURCH, ON LAND OWNED BY GEORGE CHRISTENSEN AND OCCUPIED BY HARRY CHRISTENSEN, HIS SON. THE CHRISTENSEN HOUSE IS 1/4 MILE W OF A ROAD LEADING N 1/4 MILE TO THE DANISH CHURCH WHICH HAS A PROMINENT STEEPLE. THE STATION IS 150 YARDS N OF THE HOUSE, 50 YARDS N OF A LARGE BARN AND SILO, 60 YARD NW OF A HOG BARN, IN A WINDBREAK, AND 3.25 METERS N OF A FENCE DIVIDING THE PIG LOT FROM THE WINDBREAK AREA. MARK IS DEPRESSED 12 INCHES. SURFACE, UNDERGROUND, AND REFERENCE MARKS ARE STANDARD BRONZE DISKS SET IN CONCRETE. REFERENCE MARK NO. 1, A FLUSH MARK, IS ON THE N EDGE OF THE WINDBREAK, 14.05 METERS (46.1 FEET) N OF THE FENCE AND 29.25 METERS (96.0 FEET) NW OF A FENCE CORNER. REFERENCE MARK NO. 2, A FLUSH MARK, ALSO IN THE WINDBREAK, IS 0.37 METER (1.2 FEET) N OF THE FENCE, 61.28 METERS (201.0 FEET) W OF THE STATION, AND 2.12 METERS (7.0 FEET) E OF A FENCE CORNER. TO REACH THE STATION FROM EXIRA GO W ON COUNTY ROAD J 3.7 MILES FROM THE RAILROAD CROSSING TO THE CHRISTENSEN FARM WHICH IS ON THE N SIDE OF THE ROAD, JUST E OF THE ANGLE WHERE ROUTE J TURNS TO THE RIGHT. HEIGHT OF SIGNAL ABOVE STATION MARK - 35 METERS.
01/01/1934 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1934 (CAS) THE STATION WAS RECOVERED IN GOOD CONDITION. THE STATION MARK IS FLUSH WITH THE GROUND INSTEAD OF BEING UNDERGROUND AND THE REFERENCE MARKS PROJECT INSTEAD OF BEING FLUSH. THE ANGLE TO REFERENCE MARK NO. 1 DIFFERED 2 MINUTES AND TO REFERENCE MARK NO. 2, 7 MINUTES, FROM THE 1930 OBSERVATIONS. THE STATION IS ABOUT 4 MILES W OF EXIRA, AND 9 MILES S OF AUDUBON 1/4 MILE SW OF ST. JOHNS LUTHERAN CHURCH, IN THE NW 1/4 SEC. 2, T 78 N, R 36 W, ON LAND OWNED BY GEORGE CHRISTENSEN AND OCCUPIED BY HARRY CHRISTENSEN, HIS SON. THE STATION MARK IS IN HOG LOT, 150 YARDS N OF HOUSE, 50 YARDS N OF LARGE BARN, 20 FEET N OF FENCE LINE, 60 FEET S OF FENCE LINE, AND IS IN S EDGE OF WINDBREAK, IS FLUSH WITH THE GROUND AND IS SET. REFERENCE MARK NO. 1 IS N OF THE STATION, IN WINDBREAK, 20 FEET S OF FENCE LINE. THE MARK PROJECTS 3 INCHES AND IS SET REFERENCE MARK NO. 2 IS W OF THE STATION, IN WINDBREAK, 7 FEET N OF FENCE LINE, 6 FEET E OF FENCE CORNER. THE MARK PROJECTS 5 INCHES AND IS SET. EXIRA AZIMUTH 1934, IS SE OF THE STATION, 0.4 MILE S OF COUNTY ROUTE J, 0.2 MILE S OF SCHOOLHOUSE, 100 YARDS NNE OF FARMHOUSE, 100 FEET SW OF ANOTHER FARMHOUSE, 24 FEET W OF CENTER LINE OF DIRT ROAD, 2 FEET N OF FENCE CORNER, AND 1 FOOT W OF FENCE LINE. THE MARK PROJECTS 4 INCHES AND IS SET. TO REACH THE STATION FROM EXIRA GO W ON COUNTY ROUTE J FOR 3.7 MILES FROM U.S. HIGHWAY 71, TO CHRISTENSEN FARM AND STATION. AN 87-FOOT SIGNAL AT MOHN 1930 IS VISIBLE AT 40 FEET. A 110-FOOT SIGNAL AT ZOOK IS VISIBLE AT 90 FEET. A 100-FOOT SIGNAL AT ANITA IS VISIBLE AT 50 FEET. A 100-FOOT SIGNAL AT ATLANTIC IS VISIBLE AT 50 FEET. AN 87-FOOT SIGNAL AT VIOLA 1930 IS VISIBLE AT 40 FEET. DISTANCE BETWEEN REFERENCE MARKS - 222.38.
01/01/1968 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1968 (JFS) STATION AND REF. MKS. 1 AND 2 FOUND IN GOOD CONDITION. AZ. MK. WAS FOUND DESTROYED. NEW DESCRIPTION FOLLOWS--THE STATION IS LOCATED ABOUT 4 MI. W. OF EXIRA, 9 MI. S. OF AUDUBON, IN THE NW 1/4 SEC. 2, T78N, R36W, IN THE N. SIDE OF A SHELTER GROVE AROUND FARM BUILDINGS OWNED AND OCCUPIED BY MRS. HARRY CHRISTENSEN. TO REACH THE STATION FROM THE POST OFFICE AT EXIRA DRIVE W. ON THE MAIN STREET FOR 0.65 MI. TO JUNCTION WITH U.S. HWY. 71, CONTINUE W. ON COUNTY ROAD J, A CONCRETE ROAD, FOR 3.55 MI. TO DRIVE TO MRS. CHRISTENSENS HOUSE ON THE RIGHT. STATION AND REF. MKS. ARE STANDARD DISKS STAMPED EXIRA 1930 AND SET IN CONCRETE MONUMENTS. THE STATION MARK IS ABOUT 150 YDS. N-NE OF MRS. CHRISTENSENS HOUSE, 50 YDS. N. OF LARGE DAIRY BARN, 58 FT. N. OF THE NE CORNER OF A SMALLER BARN, 28 FT. NW OF CORNER OF A T-FENCE S. WITH GATES, 36 FT. S. OF A MESH WIRE FENCE, 17.2 FT. N. OF A MESH WIRE FENCE, 7.7 FT. NE OF A TRIANGULAR BLAZED 18 INCH CHINES ELM TREE AND IS FLUSH WITH GROUND. REF. MK. 1 IS 39.50 FT. (12.040M) N. OF STATION, 7.0 FT. W-NW OF A 14 INCH TREE, 6.6 FT. N. OF A 10 INCH TREE, 2 FT. N. OF A FENCE CORNER, 0.3 FT. W. OF N-S FENCE AND 8 INCHES BELOW GROUND. REF. MK. 2 IS 201.29 FT. (61.366M) W. OF STATION, IN THE GROVE OF TREES, 43 FT. S. OF THE E-W MESH WIRE FENCE, 13.8 FT. NW OF THE CORNER POST OF ANOTHER FENCE AND PROJECTS 8 INCHES. SIGHT TO REF. MK. 2 FROM STATION BLOCKED BY TREES. ALSO, MEASUREMENT BETWEEN REF. MKS. BLOCKED BY TREES.
01/01/1969 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1969 (LFS) STATION MARK, REFERENCE MARK NO. 1, AND REFERENCE MARK NO. 2 WERE RECOVERED AND FOUND IN GOOD CONDITION. THE AZIMUTH MARK WAS FOUND DESTROYED AND THE DISK WAS RECOVERED. NO OBJECTS WERE VISIBLE FROM STATION SITE SO A NEW AZIMUTH MARK WAS NOT SET. THE OLD ST. JOHNS LUTHERAN CHURCH SHOWN IN THE 1934 DESCRIPTION HAS BEEN TORN DOWN. FOLLOWING IS A NEW DESCRIPTION. LOCATED ABOUT 4 MILES WEST OF EXIRA, 9 MILES SOUTH OF AUDUDON, IN THE NORTHWEST QUARTER OF SECTION 2 T 78 N, R 36 W, IN THE NORTH SIDE OF A SHELTER BELT AROUND FARM BUILDINGS OWNED AND OCCUPIED BY MRS. HARRY CHRISTENSEN. TO REACH THE STATION FROM THE POST OFFICE IN EXIRA, GO WEST ON MAIN STREET FOR 0.65 MILE TO THE JUNCTION OF U.S. HIGHWAY 71. CONTINUE WAS ON COUNTY ROAD J, A CONCRETE ROAD, FOR 3.55 MILES TO A DRIVE TO MRS. CHRISTENSENS HOUSE AND THE STATION ABOUT 150 YARDS NORTH-NORTHEAST OF THE HOUSE. STATION MARK, A STANDARD DISK STAMPED EXIRA 1930, IS SET IN THE TOP OF A SQUARE CONCRETE POST WHICH IS FLUSH WITH THE SURFACE OF THE GROUND. IT IS 50 YARDS NORTH OF A LARGE DAIRY BARN, 58 FEET NORTH OF THE NORTHEAST CORNER OF A SMALLER BARN, 28 FEET NORTHWEST OF A CORNER OF A T-FENCE SOUTH, 36 FEET SOUTH OF A MESH WIRE FENCE, 17 FEET NORTH OF A MESH WIRE FENCE, 7.7 FEET NORTHEAST OF A TRIANGULAR BLAZED 18-INCH CHINESE ELM TREE, AND 1 FOOT SOUTH OF A METAL WITNESS POST. THE UNDERGROUND STATION MARK WAS NOT INSPECTED. REFERENCE MARK NO. 1 IS 39.50 FEET NORTH OF THE STATION, 7 FEET WEST-NORTHWEST OF A 14-INCH TREE, 6.6 FEET NORTH OF A 10-INCH TREE, 2 FEET NORTH OF A FENCE CORNER, 0.3 FEET WEST OF A NORTH-SOUTH FENCE, AND COVERED WITH 8 INCHES OF DIRT. REFERENCE MARK NO. 2, A STANDARD DISK STAMPED EXIRA NO. 2 1930, IS SET IN THE TOP OF A SQUARE CONCRETE POST WHICH PROJECTS 3 INCHES. IT IS 201.29 FEET WEST OF THE STATION, IN THE GROVE OF TREES, 43 FEET SOUTH OF THE EAST-WEST MESH WIRE FENCE, 14 FEET NORTHWEST OF THE CORNER FENCE POST OF ANOTHER FENCE. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--ABOUT 4 MILES WEST OF EXIRA.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in May 1999.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

Advertising with Us

Return to the Top of the Page