Lumber producer Interfor said it would close two sawmills due to depressed prices for Southern yellow pine boards. The Canadian company said log deliveries would stop immediately and operations would be wound down by the end of September at its mills in Summerville, S.C. and Meldrim, Ga., which have a combined annual capacity of of 330 million board feet. Interfor said the closures were factored into the companywide 15% production curtailment it announced earlier this month.