N&W Bridges -- Guidance Sought for a Unique N&W Prototype

[NW Modeling List]

Thanks.  Looked via Google Earth.  Impressive yards along the Tug.  One crossing in Williamson, W.Va., has the siding well before the bridge.  I followed the mainline as far as the vicinity of Lovely, Ky., where there is an interesting Y with twin bridges across the Tug.  But the turnouts to/from both bridges are before and after the bridges, not on the bridges themselves.

Bill