Section 3702.90 Datum For Dam Elevations

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Illinois Administrative Code › Title 17 CONSERVATION › CHAPTER I: DEPARTMENT OF NATURAL RESOURCES › Part 3702 CONSTRUCTION AND MAINTENANCE OF DAMS › Section 3702.90 Datum For Dam Elevations

This text was captured on Aug 14, 2026. It is a snapshot, not a live feed, so check the official code before relying on it.

Text

Section 3702

Section 3702.90 Datum For

Dam Elevations

All elevations for Class I and

Class II dams shall be on the National Geodetic Vertical Datum (same as mean

sea level (MSL) 1179 adj.). Where possible, Class III dams shall also be on

the NGVD datum. (Datum means the level surface used for reference in determining

the elevations of features of a dam)

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