The Longview mill and its neighbors have been hit multiple times with allegations of pollution in recent years. Less than two months after it sued over alleged river pollution in Cowlitz County, a group of environmental activists inked a settlement with one of the world’s largest timber firms. Columbia Riverkeeper and Weyerhaeuser will settle on a deal to end the former’s lawsuit in exchange for upgrades at a mill in Longview, Washington… Columbia Riverkeeper first sued the Seattle-based timber giant on March 7, alleging its Longview mill has been discharging harmful levels of run-off into the Columbia River. Riverkeeper alleged the discharges hurt oxygen levels for fish and can spur the growth of harmful bacteria. In a proposed settlement signed on Friday, Weyerhaeuser agreed to reroute a stormwater pipe, aerate a pond, install new monitoring devices and filters, and change on-site procedures to “more actively manage wood and bark debris.”