Enbridge: Sweet Oil Only -- North Dakota, USA

From the Director's Cut, January 7, 2011:

"Production shipped by rail is growing and crude trucked to Canada is expected to increase when the Enbridge system goes to 100% sweet crude from Minot to  Clearbrook." In previous releases, it was thought that crude trucked to Canada might decrease with increasing rail and pipeline capacity.

This is huge. I will comment on this later if I remember. For now, I will let readers sort out what this means.