Bob - I also have built an Hon3 model of the Sargent Coal Dock. There was a Model Railroad Craftsman (1960's?) that covered building a not very prototypical model of the dock, but had some great B&W photos. In addition, a volume of Trails among the Columbine (Sundance Publications) has some good photos as well. I also used the Maxwell plans.
I will be away from home (buisness) for the next 2 weeks, but back channel me at
mikedramsey@earthlink.net, and I will send you the specific info and some photos of my dock as well as any other info I may have.
Mike Ramsey