SEATTLE — A Tacoma paper mill is closing its doors next month, ending operations at a site that, over 94 years of operation, became a local legend for all the rottenest-smelling reasons. The closure, announced earlier this month, is expected to take effect on Sept. 30. WestRock, an Atlanta-based paper and packaging manufacturer, employs approximately 400 workers at its facility in Tacoma. …The WestRock facility has been in use as a paper mill since 1929, when it was built by the St. Regis Paper Company. The mill lasted nearly a century as the most prominent vestige of a once-burgeoning paper industry in the city. …WestRock has not shared specifics on future plans for the property, though Reay said that it would ideally be retained as industrial land. …Tacoma’s paper mill, located at the mouth of the Puyallup River, is well known in local lore as the supposed source of the “Aroma of Tacoma”.