Browse resources Displaying 1 - 2 of 2 resources Where to empty onboard portable toilets in Oregon This video encourages boaters to empty their portable toilets at designated facilities at marinas and short-term tie-up docks. Jul 2017 | OSU Sea Grant Publication Peer reviewed (Gray level) Where to empty onboard holding tanks in Oregon This video encourages boaters to empty their sewage holding tanks at pumpout stations at marinas and short-term tie-up docks. Jul 2017 | OSU Sea Grant Publication Peer reviewed (Gray level)