Re: KEH hows the flooding in your area?

Posted by KEH on October 07, 2015 at 17:15:57 from (67.231.175.190):

In Reply to: Re: KEH hows the flooding in your area? posted by Richard G. on October 07, 2015 at 08:00:52:

Hi, Gary,

I got about 10 inches of rain total over several days. The issue was that a low pressure area spun off the hurricane that did not hit the East coast and headed across the East-West center of the state, right over Charleston and Columbia, also over me but we didn't get the huge amounts of rain they got further East. Saturday night and early Sunday it rained all night and I had 3.5 inches in the rain gauge.

Our church has design problems dating from when it was built in 1920 which causes water to come under the church. The furnace is in a lower area about 8 x 8 feet and is lower that the rest of the under the church area. There is a sump pump in the furnace pit. Under heavy rain conditions that pump can fail, resulting in a flooded ruined furnace. After one such experience we had another pump placed up stream. On one occasion it failed also. Saturday i checked that pump and it was working. When I got to church it was not working and the water was going to the furnace pit. Previously I had bought another pump, a sumergeable. as a back up but it was not in a pit. I operated it manually and got the water under control. I had visions of operating it all night, but another guy who knew more than I did got the other pump working. (hung up float) Rain stopped, all dry. Church has stone walls and was build up to a certain level and dirt filled in on one side. That side has down spouts from the roof emptying into very old red terra cota(sp) pipe which carries the water to a couple of junction boxes and then off the property to a road ditch. My thought was that the pipe was stopped up. Had a snake with a camera run in ther Monday. One area blocked with dirt and some roots. Not a complete blockage but we are going to have the pipe jetted out, yesterday, but no show yet. That is not going to solve the problem because the water that accumulates in the fill dirt is coming in under and through the stone walls below the red pipe.

Charleston and Columbia: Charleston and other areas along the coast got up to 20 inches of rain. I 26 into Charleston closed. Streets flooded, in one case an alligator was swimming in the street. The section of town along the harbor is maybe a foot above high tide ordinarily.

Columbia's situation has gotten the most attention. I commented in another forum on YT forum something about the State's river system that was causing the problems.

To begin with they are not large to someone who is used to the Ohio and Mississippi rivers. I'm on a ridge between two rivers, each one of which is roughly the size of the Iowa river, as I recall seeing it. That is the river that goes through Iowa City, isn't it? By the time the waters reach Columbia several more rivers that size have joined a couple of larger rivers. The Broad river and the Saluda join at Columbia to form the Congaree river. The Congaree's normal flood stage is 115 feet, it is now expected to crest at 125 feet. In addition, several small dams have burst in the Columbia area adding to the problems. One was in an upscale subdivision, Forest Acres, which was started over 50 years ago when I was in Columbia in school. AFIK the two lakes in that area were housing development lakes built so the developers could sell lake front lots. I don't know anything about the others.

Pictured on the news was a National Guard helicopter dropping a huge sand bag in a break on the Columbia canal. I'm hazy on the details, but the Columbia canal was built in the 19th century so there could be water transportation from the Congaree River to the Broad river. In thelate 19th or early 20th century the canal water was used to generate electric power and maybe still does. Now AFIK Columbia gets its water supply from the canal so a break is not good from that standpoint. The reason for the canal was that there are rocks and shoals in the Broad river and the Congaree at Columbia. There are no more shoals or falls from there to the Atlantic ocean, a distance of about 125 miles. Below Columbia the Congaree and the Wateree rivers join to make the Santee, which is a large river by any standard. All the river names mentioned ending in "ee", plus the Saluda River, and named for Indian tribes that once lived along their banks.

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