This is a lift bridge we went under the bridge spands over Minnesota and Wisconsin so on each side is a different state.

Small pleasure craft can go under without it lifting - no problem but the larger ones like that we were on and the barges need it lifted. The pilot radios the bridge operator and will then lift the bridge, at times a large queue of larger boats will idle until the brigde can be lifted. There was not busy out on the river today, it is still early in the season being that this is MN.