+1 for Viberg ^Viberg hand made boots cost the big bucks though. They've got their reputation from making loggers boots for about 75 years along the west coast. They ship boots around the world.
In your conditions 2 pair minimum is required. I worked in up to 8" of water all day. Rubber boots were shredded within a week. After a day or 2 they were good at holding some water in. You had to use leather and if you wanted them dry for the next day you would burn them from being too close to the heater. Even with 2 pairs you weren't guaranteed to have a dry pair for the morning. 3 pair would do it but who can afford that. On the 2nd night or early morning you would apply dubbin to the pair that had been sitting drying so they were semi water proof for the work day and I mean you rubbed it in good. I think it took about 1/2 an hour to rub the stuff in. There is nothing worse than starting your day with wet feet.
I have pictures of some work boots that were a few months old and I was wiring the soles to the uppers with tie wire. Too bad they are negatives and not digital or I'd post them.
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