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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: i-node who wrote (250224)	9/7/2005 7:34:59 PM
From: combjelly	Read Replies (2) \| Respond to of 1576619

"But it doesn't make sense to me that a pump for this kind of operation isn't submersible --" I agree. But it comes down to what is practical. Sealing off a large enough electric motor to drive pumps that big is extremely expensive. And even then, you probably wouldn't be able to guarantee that they wouldn't leak, even a little. So best to build them up as high as practical and hope for the best. There are some big pumps that can be submerged. But they only use them when absolutely necessary. And, I am told, maintenance is a nightmare. Taking them apart is a very time extensive task. When I lived in Galveston, I knew a guy who was with the Corp. of Engineers. He was in the group responsible for keeping Texas City dry.