posted on Jun, 24 2011 @ 01:16 PM
This will probably be my last post or reply on this thread. CLPRime. I don't know how to be more descriptive. It's never just the H2O coming at
you in a dam burst, it's all the debris being carried along with it. At Johnstown the debris built a series of temp dams that caused the waters to
build up to thirty feet or so, and then burst through again and again. As I posted, it looks to me that that nuclear plant is in an old slough or
meander of the Big Muddy. By definition, any slough was once the channel. And there was never a big earthen dam break causing it to change channels
in those days. This is supposed to be flood control, but if this Spring really is a high water year of Biblical proportions, then like stretching a
rubber band to it's breaking point, the flood control dams could indeed snap and change the course of the river to boot. I live near some pretty
mean rivers. But what I personally fear isn't above my head, it's what lies downstream. If the steep canyon walls were to cave in and block the
impoundments, the present water levels would turn our little town into a bathtub in a few minutes. This would only happen in a pretty severe
Earthquake, but it did happen at Quake Lake, near Yellowstone Park in 1959. The Gov't engneers would have to work from the downstream side of the
slide, just like at Quake Lake. Or just wait for the overflow to start wearing down the unconsolidated debris. Right now, the margins of safety
engineered into those 1930 flood control dams on the Missouri River must be stretching pretty tight. And there will be so much debris, that the
floods will throw up temp levees of debris that will re-focus the main thrusts downstream, as well as build up new spillways. So instead of a smooth
flow, you will see a sawtooth pattern of new plunge pools and relocating of channels. We can see these same structures in our roadside geology out
in the Scab Lands. We call them the "Potholes". Each pothole is circular and was scoured out in a day or so. Some are quite deep little lakes
even after 20,000 years of detritus filling them in. But rest assured that the Gov't engineers have a study or two on the ultimate disaster if their
engineering fails, in a super high water year, like this one. It's filed away. The real kicker is that these were written when the dams were brand
new. Add forty years or so, and the pools are half full of fine silt. For us, the three Hells Canyon Dams, (earth filled) would flood us really
good, if it was all water. A 600ft high concrete dam on the other hand would only do about half the damage, if it failed in a quake. Either way the
temp debris dams would give us about 45 minutes to evacuate. But a quake big enough to breach a gravity concrete dam would cause so much damage that
getting up out of the valley like those runaway Sri Lankan Elephants did, would be almost impossible. The last big quake here ran up the Columbia
River and it's tributaries, like the veins in a leaf. That was in 1846, and there wasn't much to destroy hereabouts. If TPTB would allow the real
hazard engineering to be published before starting some of these modern wonders, they would never get built. For the Missouri valley, that would mean
no end to the almost annual flooding up and down the valley. Portland, Ore., flooding was the prime reason for building Grand Coulee in the
thirties, the Hells Canyon complex in the fifties, and Dworshak in the early seventies. So you see the PNW is bracketed by about a fifty fifty mix of
concrete vs. Earthen Dams. The Big Muddy seems to have all the flood control eggs in one big earthen filled basket. I think that's the reason for
the extra concern here for what may happen there through late July of this year. So for you to blithely postulate what you are sure is a worst case
scenario, is incredibly foolish. Unless you can unlock those original and now out of date, hydrology studies, you haven't got a clue! The really
bad part of this is those original 1930's dust bowl era studies had no clue either, about the wild waters scouring out a nuclear plant's old fuel
rod storage pool, and grinding the rods up and depositing them all over the place. When the waters recede, the silt dries, and the Sun turns it into
wind blown dust, and then I think you will get my point. Those liberated radio nucleotides don't have to stay buried, or even bedded down in the
flood plains. Try and think new of a new Dust Bowl, or dare I say; a new "Fallout Bowl". And this is actually happening right now in Japan through
the same wind blown mechanisms around Fukashima. It's not getting up into the stratosphere, like the nuclear bombs back in 1945, but it's slowly
getting dispersed around Honshu Island, all the same.