Building A Trestle Span

Recently, I decided to add a new canyon to my N-scale layout. The plan was to build three separate trestle spans across my new canyon, after I build my new canyon of course! This was my opportunity to create a steel sub-girder trestle 280 feet long and 75 feet tall, plus two main line trestle spans, 200 feet long and 50 feet tall! Not to mention the possibility of some deep-water scenery and maybe a chance to model a boat.