Gruene Bridge

At levels up to 2000 cfs, Gruene Bridge is generally passable on far river left.  Between 2000 and 3000 cfs, whitewater kayakers can generally still get through on that side by kissing the deck, but larger boats should portage.  Always check for debris under the bridge before attempting to go under it.  There is an eddy at river left that you can use for boat scouting.

At levels above 3000 cfs, the bridge is a must-portage death trap.  At around 3500 cfs, the clearance under the bridge disappears, and at 5000 cfs, the water piles up and forms a potentially deadly hydraulic.  Multiple boaters have lost boats underneath the bridge at 3000-5000 cfs, and those boats stayed there until the level dropped.  There is a sidewalk at river right on both sides of the bridge, making it easy to take out and put in without encroaching on private property.  At high levels, if you are not confident that you can run Gruene Rapid without swimming, then take out at river right in the pool above Gruene Rapid and portage both it and the bridge.