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A volunteer pulls up overgrown blackberry plants in the Nichols Natural Area during a work party back in March. Volunteers are needed to help with upcoming work parties on Sept. 25, 5-7 p.m. and Oct. 19., 9 a.m. to noon.

Columbia Riverkeeper invites the public to fall work parties at the Nichols Natural Area on Wednesday, Sept. 25 from 5-7 p.m. with pizza and drinks; and Saturday, Oct. 19 from 9 a.m. to noon with coffee and donuts.

“Help transform a former industrial site to a thriving riparian habitat,” said a Riverkeeper press release. Volunteers will have a chance to win raffle items donated by Sucaro (www.sucaro.com) and Rep Your Water (www.repyourwater.com).