- You'll find several convenient dump stations near John Day, Oregon to take care of your RV waste disposal needs.- The Pendleton KOA offers a dumping station with amenities such as fresh water and a hose for flushing tanks.- Another option is the Grande Hot Springs RV Resort, which provides dumping facilities along with an RV trash bin.- C & M Country Store also offers a dump station for both black water and gray water.- Lastly, the Tri-Cities RV Park in nearby Richland has a dump station available for use.