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Mobiloil; Warrior Rock, Columbia River, near Portland, Oregon

Warrior Rock, Columbia River, near Portland, Oregon | 1984-Mar-19

Initial Notification: The Tank Vessel Mobiloil, while en route from Ferndale, Washington to Portland, Oregon, suffered a steering failure at 0005 on March 19, 1984 which resulted in the grounding of the vessel near Warrior Rock in the Columbia River approximately 10 miles downstream from Portland, Oregon. Punctures and gashes ruptured the number 1-5 starboard cargo tanks releasing 3,925 barrels of heavy residual oil, industrial fuel oil, and No. 6 fuel oil. The vessel remained grounded perpendicular to the current until March 26, when it was refloated and escorted to dry dock in Portland. At the time of the spill the wind was from the south and the river current velocities were 1.5-3.0 knots. The incident occurred in a turbulent area of the river that experiences some tidal influence. USCG district 13. Keyword: Volunteers, sub-surface oil, boom, manual removal, reoiling, International Bird Rescue and Research Center (IBRRC), contingency plan, canonball diaper sampler..

Incident Details
Products of concern:Heavy residual oil, industrial fuel oil, No. 6 Fuel Oil
Total amount at risk of spill: 165,000 gallons
Latitude (approximate): 45° 51.00′ North
Longitude (approximate): 122° 46.98′ West