North Fork operation questions

[NW Modeling List]

I've been re reading the branch line book on NorthFork branch and I have some operational questions. 

From what yard were the mine shifters home based?  I'm mostly interested in operations during the teens and 20s. With electrification in the 20s I would think blocks of empties would be delivered to an intermediate yard. 

Also, prior to the loaders becoming cleaning plants (in other words when they were wooden tipples) was the majority of the product coke?  

Was coke in the 20s shipped in boxcars or hoppers?


Tom Lewis