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The County of DuPage
Wheaton, Illinois
 

Geographic Information Systems

Control Pt IDs\Benchmarks reported as "Missing\Destroyed" in the field

If you know of any additional benchmarks that are possibly missing\destroyed in the field contact benchmarks@dupageco.org. If a missing benchmark listed below was located\recovered in the field, please send an email to benchmarks@dupageco.org along with a digital image of the recovered benchmark. If verified, the benchmark will be removed from the list shown below.

 ****Notice Benchmark Data as of: April 25, 2012****
DuPage County has upgraded its benchmark system from the North American Geodetic Vertical Datum of 1929 (NGVD29) to the North American Vertical Datum of 1988 (NAVD88).

NAVD88 Benchmarks Reported Missing:

01 Addison Township NAVD88 Benchmarks: (None Reported Missing.)

02 Bloomingdale Township NAVD88 Benchmarks:

    Id #0209 Reported destroyed as of 08/02/2018

    Id #0205 - Reported as destroyed on Dec. 20th 2012 \ New bridge. NOTE: This benchmark has been replaced / reset in the field. NEW ID "0205 RESET". (Vertical Order: Third.)

03 Wayne Township NAVD88 Benchmarks: (None Reported Missing.)

04 Winfield Township NAVD88 Benchmarks: (None Reported Missing.)

05 Milton Township NAVD88 Benchmarks: (None Reported Missing.)

06 York Township NAVD88 Benchmarks: (None Reported Missing.)

07 Naperville Township NAVD88 Benchmarks: (None Reported Missing.)

08 Lisle Township NAVD88 Benchmarks: (None Reported Missing.)

09 Downers Grove North Township NAVD88 Benchmarks: (None Reported Missing.)

10 Downers Grove South Township NAVD88 Benchmarks: (None Reported Missing.)

NAVD88 Benchmarks outside of DuPage County in Kane, Will and Cook County: (None Reported Missing.)