Out West unless you are very familiar and know the road as good as your hand,
NEVER, NEVER ENTER A WASH THAT HAS WATER FLOWING, specially muddy water the flash flood can and does erode the pavement and the culvert tubes and leaves a channel that can be several feet deep.
It can also rain in the mountains several miles away and bee perfectly dry where you are and have a flash flood go through the wash and sweep everything away.
Pay attention to weather reports and signs and also seek local advice, those of us that live out west know a thing or two about flash floods.
navegator