City of Woodburn is receiving bids for the cleaning of the Digesters, rehab of the digester tank if required (Alternate), design and installation of a new hydraulic mixer system. Proposals shall be addressed to the City Engineer, City of Woodburn, 190 Garfield St., Woodburn, OR 97071. Bids shall be submitted in a plain sealed envelope bearing the Bidder's name, the name of the project and the date and time of the Bid opening, and shall be clearly marked "Bid No.