Interesting little bridge. Without a closer inspection, I suspect that the outriggers might be a later addition.
Walk down old abandoned road from hiway to this one. Amazing location, very high off creek bank. Spoke with local property owner. Neat experience.
Most definitely on those outriggers. Different shape, color, and rust patina - first thing that stands out when staring at it from a good side view. Home construction on opposite side is brilliant - huge deck overlooking creek valley.