I don't know anything about SBVR so can't comment on whether is it a good investment or not. The late Sen Byrd epitomized what is wrong with our congress, non of them care about the country as a whole, just about bringing home pork in order to get re-elected. But that is another very sore subject.
Back to NWP vs SBVR, the biggest difference I see in about 5 minutes of research is that the SBVR actually has freight to haul. There is no real industry left in Humboldt County. What is left of the Timber Industry won't support anything and there will never be any industry in the county. Even if someone wanted to build a plant of some sort that could contribute toward railcar loads, the very vocal local gadflies would protest and sue until the idea was given up on.
I know there is the pipe dream of a container port but this will never happen. Read some of the reports regarding the widening of the Panama Canal and what that will do to the transcontinental container traffic and the West Coast port. This will take a lot pressure of of the existing WC ports even when the economy picks back up, leaving no need for a second rate port in the middle of nowhere.
"Freight service operates five days a week, Monday through Friday, with special and unit train operations on weekends as needed. The SBVR provides service to the Grant County Industrial Park, Petersburg; Moorefield Industrial Park; and Hampshire County Industrial Park, Romney. The SBVR's largest customer is Pilgrim's Pride in Moorefield. Pilgrim's feed mill receives corn and other commodities used in the manufacture of its poultry feed. Three customers are located in Petersburg. Greer Lime ships outbound loads of lime to power stations and steel mills. Allegheny Wood Products ships finished lumber. Adell Polymers receives loads of plastic pellets. Total carloadings average between 3,800 and 4,000 per year."
from
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www.transportation.wv.gov]