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Construction Benchmarks
Official Benchmark Data
Data current as of June 15, 2007

  • Coordinate Units: US Survey Feet
  • Distance Units: US Survey Feet
  • Height Units: US Survey Feet
  • Coordinate System: IL State Plane 1983
  • Zone: Illinois East 1201
  • Datum: NAD 1983 Continental United States (CONUS)
  • GEOID Model: GEOID99 (CONUS)

Feature Name
Degrees North
Degrees East
Elevation
Alpha
1,906,875.168 943,601.576 909.617
Bravo
1,907,928.282 946,482.350 907.470
Charlie
1,906,283.957 950,275.530 873.202
Delta
1,905,908.852 946,816.513 896.338
Echo
1,903,307.832 947,247.366 841.861
Foxtrot
1,901,605.899 945,894.046 839.621
Gulf
1,900,945.987 943,699.129 830.500
Hotel
1,899,895.440 946,615.582 841.298
India
1,899,573.417 949,297.311 812.008
Juliet
1,894,769.198 951724.129 810.324