you see some of these images out of columbia and just incredible to compare the before and after perspective. we often say you only need 30 centimeters, about one foot of moving water, about six miles per hour to give about 500 pounds of lateral force. it does not take much water to create substantial damage. we know the northern portion of the state, the appalachian mountains rise up to about 3500 feet. farther to the south you bring in the hundreds of rivers and tributaries. the low country, the marshland. all of this water has rained upstream and want to come down eventually into the atlantic ocean down stream. about a dozen or so dams have been jeopardized and levees as well. you look at this situation when it comes to dams and the amount of stress involved. in the united states, 30% of dam failures are because of overtopping. you get extra water that goes over the banks of the dam itself.
t thailand by the sea level areas. the conditions are not going to improve in the immediate future. look at the before and after images we re getting. you see what it looked like before. look at the significant damage done to some of the property with the water coming. i often talk about getting one foot of moving water on the order of six miles per hour. the lateral force is 500 pounds. the amount of weight associated with the moving water of about 30 centimeters. portions of myrtle beach, wilmington, north carolina getting the last bout in the storm system. the drying condition pushes into this region. it looks like conditions will want to improve, and certainly fantastic news for people to see sun shine but the appalachians across the northern portion of south carolina, elevation across north carolina gets as high as 1000 meters.