There are also sections where the water is so murky & soupy that the experienced divers describe it as swimming though black, muddy coffee.
The last pic above isn't quite accurate. It's not all underwater. There are two sections that are (currently) above water and the divers use each area as staging areas. It also allows them to come up out of the water when going back & forth. However, if it rains more, then yes, the whole thing will look like the pic.
Even so, it has taken some of the expert, experienced divers 6 hours to get all the way through from beginning to end.
The rescue team is teaching the kids how to scuba dive now. It's not like the kids have much to occupy their time otherwise. And it gives the rescue team an option of how to proceed, once the kids know how to swim & dive.
A FIOS cable is being threaded all the way through so the kids will be able to call & talk to their parents on the other side. The cable got too wet yesterday while under water. But, they are making another attempt today, once they figure out how to keep the cable dry.