Data is carefully keeping track of River, as his senses are less confused by the chaos of the torrent. It takes him longer than he would like, though, to realize that she is unconscious-- he did not clearly see what happened. He grabs hold of her as soon as he notices she is no longer moving on her own.

Unfortunately, swimming while holding onto somone is significantly more difficult, and his progress will be slowed somewhat. He has to shield her several times from hitting the walls of the narrow tunnel they are in, when his attempts to fight the current are unable to keep him from knocking into the sides.

It takes more than one minute. River will be without air for a brief period of time.

He pulls her out of the water and onto the muddy riverbank. Without letting go of her waist, he brings his head to her chest to listen for fluid in her lungs. She seems to have swallowed a lot of water, but she still has a pulse.