... Wouldn't one of these be a great O-gauge model?
I recall seeing an ore dock like this featured as part of a model railroad in one of the Kalmbach "Great Model Railroads 20XX" magazines (usually published annually around the holiday-season). I'll double-check, and let you know details if I can locate the article. It might not have been O-Gauge, but I was pretty impressed by it nonetheless.
David