MONTANA — Community leaders said Friday news that Pyramid Mountain Lumber plans to close the Seeley Lake mill, the area’s largest employer, will change the fabric of the town in the Seeley-Swan. …“Among other problems, labor shortages, lack of housing, unprecedented rising costs, plummeting lumber prices, and the cost of living in western Montana have crippled Pyramid’s ability to operate,” the company said. Claire Muller, head of the Seeley Lake Community Foundation, said the news is heart-wrenching for the community, and she believes it must have been heartbreaking for the owners. …Friday, an economic development leader in Missoula County said the closure could have impacts across the region, and “interested parties” are talking about whether there’s a way to keep the facility open. Grant Kier, head of the Missoula Economic Partnership, said the announcement is devastating for people who have built lives and livelihoods around the mill.