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Lake Superior outflow reduced for August





       INTERNATIONAL LAKE SUPERIOR BOARD OF CONTROL

                                                  31 July 1997

    FOR IMMEDIATE RELEASE

                     LAKE SUPERIOR OUTFLOW CONDITIONS

    The International Lake Superior Board of Control, under authority
    granted to it by the International Joint Commission, has set the Lake
    Superior outflow to 2680 cubic metres per second (m3/s) for the month
    of August.  This is the outflow recommended by the regulation plan for
    the month of August and is a reduction from the July outflow of 3350
    m3/s.

    This flow will be released by discharging about 1990 m3/s through the
    three hydropower plants and passing most of the remaining flow through
    the control structure at the head of the St Marys Rapids.  The number
    of gates open at the  control structure will be reduced from the July
    setting of ten gates fully open to four gates set fully open for
    August.  In addition, on August 1, 1997 the gate that supplies the
    Fishery Remedial Works will be partially closed to reduce its flow to
    its normal setting of 15 m3/s.  The ongoing repairs to two of the
    gates of the control structure are not expected to limit the outflow
    in August.

    During July, the water supplies to Lake Superior and Lakes
    Michigan-Huron were near average.   Currently, Lake Superior is 14
    centimetres (cm) above its long-term average beginning of August level
    and about 4 cm below the level recorded last year.  The level of Lakes
    Michigan-Huron is about 57 cm above its long-term average level and
    about 32 cm above the level of a year ago.  The Board will continue to
    monitor conditions on Lake Superior and downstream and will advise the
    International Joint Commission accordingly.

    Mr. Doug Cuthbert, Environment Canada, Burlington, Ontario is the
    Board Member for Canada. Mr. Dwight Beranek, Acting Deputy Division
    Engineer, Great Lakes and Ohio River Division, U.S. Army Corps of
    Engineers, is the Acting United States Board Member.

    Additional information can be obtained from Mr. Peter Yee, Great Lakes
    St.Lawrence Regulation Office, Environment Canada, Cornwall at (613)
    938-5725 or by e-mail at Peter_Yee@pch.gc.ca. or from Mr. David
    Schweiger, Great Lakes Hydraulics and Hydrology Branch,  Detroit
    District, U.S. Army Corps of Engineers, at (313) 226-6440 or by e-mail
    at David.L.Schweiger@usace.army.mil