I guess that explains the design of some of the "water level" bridges we crossed. There's nothing to wash out.
That's how I interpreted it, looking at those water level markers showing how many feet above the road surface the water could be expected to rise... 5 to 9 feet, depending on the crossing!
Keith the road engineer oughta be able to e'splain it to us, Lucy.
Low water crossings. Culverts and bridges wash out....
Liberalism is a mental disorder that leads to social disease.