The pipeline, unofficially called the Double H, is proposed to stretch 462 miles from the Bakken oilfield location of Dore, North Dakota to Guernsey, Wyoming where it will connect with the Pony Express pipeline. The Pony Express formerly transported natural gas, but is being retrofitted to handle crude oil and would then transport the crude oil all the way to Cushing, OK, a storage and trading hub for crude oil. The oil purchased from Cushing is usually refined at Gulf Coast refineries.The pipeline is to use 12” diameter pipe which will stretch across 48.4 miles of Fallon County. Its initial capacity was listed as 50,000 barrels per day (bpd) with a planned expansion of 80-100,000 bpd.
I don't know if this project has been complete -- perhaps a reader knows [see first comment below] -- but it would have gone into operation in August, 2014, or thereabouts.