Folks the Kalamazo River recovery was a dredging operations as the crude sunk!

Please read the EPA "EPA Response to Enbridge Spill in Michigan"
https://www.epa.gov/enbridge-spill-michigan

First paragraph states - 
On July 26, 2010, a 30-inch pipeline belonging to Enbridge Inc. ruptured near Marshall, Michigan and contaminated Talmadge Creek and the Kalamazoo River with hundreds of thousands of gallons of crude oil. EPA ordered Enbridge to dredge submerged oil and oil-contaminated sediment from the Kalamazoo River. From 2010 to 2014 over 1.2 million gallons of oil were recovered from the river.

Notice the last sentence in the above paragraph which Canadian Federal Government Technical Report fails to point out. 

Yep, the crude sunk and they had to dredge it as it was a solid. Try dredging any of the routes the tankers take from the Port of Vancouver to Buoy J at the mouth of the Juca de Fuca.