Originally posted by ccc_ it is much more than the twenty miles to your place
it is the mileage of every tributary that dumps into the river and all the acres that shed water into those waterways
our creek isn't much of a thing but in the mile and a half it takes to get there it has two tribs and drains several hundred acres
many years ago I was trying to explain to an exurbanite that the flats that ran 15-20 miles between the bluffs were cut by water
he wasn't having any part of it
one spring the river that was normally three quarters of a mile wide was as much as fifteen miles wide for a month
when he rebuilt it was on a berm twenty feet high
Guys, the terrain and stream characteristics that Racer has are completely different from anything in Texas, especially down there in the great flatness of the coastal plains. Flatland streams tend to be very "flashy", especially in areas where heavy downpours are common and there's not much land cover of the vegetation type. Human stuff like roads, parking lots, buildings, and stream channeling makes it all worse. Racer is up in the mountains, on a steep river. He's surrounded by miles and miles of thickly forested hills and mountains with thick soils that absorb our rains and retain much of the water in storage instead of runoff. So if he is satisfied with his choice on the flood insurance, he has at least based it on a much better situation than South Texas.
As it happens, I work with water in the USGS, many of our folks are down there right now assisting and gathering data for flood measurements and future predictions. Building in flood plains is one of the things I too, get worked up over, as well as the insurance, but in this case Racer is ok.
Jim