Illinois Administrative Code
Title 17 - CONSERVATION
Part 3702 - CONSTRUCTION AND MAINTENANCE OF DAMS
Section 3702.90 - Datum For Dam Elevations
Universal Citation: 17 IL Admin Code ยง 3702.90
Current through Register Vol. 48, No. 38, September 20, 2024
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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