EM 1110-2-1100 (Part II)
30 Apr 02
Table II-5-8
Low Water (chart) Datum for IGLD 1955 and IGLD 1985
Low Water Datum in Meters
Location
IGLD 55
IGLD 85
Lake Superior
182.9
183.2
Lake Michigan
175.8
176.0
Lake Huron
175.8
176.0
Lake St. Clair
174.2
174.4
Lake Erie
173.3
173.5
Lake Ontario
74.0
74.2
Lake St. Lawrence at Long Sault Dam, Ontario
72.4
72.5
Lake St. Francis at Summerstown, Ontario
46.1
46.2
Lake St. Louis at Pointe Claire, Quebec
20.3
20.4
Montreal Harbour at Jetty Number 1
5.5
5.6
Figure II-5-20. Vertical and horizontal relationships for the IGLD of 1985 (Coordinating Committee on Great
Lakes Basic Hydraulic and Hydrologic Data 1992)
Water Levels and Long Waves
II-5-35
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