Vancouver, British Columbia, Canada, 29 February 2008 -- Ainsworth Lumber Co. Ltd. today announced that it will curtail operations at its oriented strand board (OSB) mills in Grande Prairie, Alberta, and 100 Mile House, British Columbia, due to reduced customer demand. The Grande Prairie mill closure is scheduled to take effect on 12 March for at least two weeks and the 100 Mile House mill closure is planned for 17-25 March. The Grande Prairie and 100 Mile House mills have annual production capacities of 665 million square feet (3/8-inch basis) and 425 million square feet (3/8-inch basis), respectively.

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