The Collapse of the Key Bridge by [[Martha S. Jones]]

Well, yes, when bridges fall in the water they block the water where they've fallen. They'll be able to focus on clearing the main channel first and get the port operating with cranes and scrapping crews once the investigation captures evidence on that section (likely scans and photographs of how they debris fell).

Not all of the bridge needs to be picked up for traffic to be restored. Highway travel impacts are likely to take longer, but adding car ferry service would be an option until a temporary span can be put in place until a permanent replacement can be erected.