basement below water table

Old 01-10-02, 12:57 AM
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basement below water table

I would like to finish the basement in our home that is 1 1/2 years old. However, the basement floor is approx. 1-2 feet below the water table. I have two sump pumps, one inside the foundation wall and one outside. The inside pump kicks in about every hour and a half. I have a battery backup installed, but I still worry about water in the basement if both pumps fail.

I have an idea that I want to run by the folks on this board. What about pouring a 2-3 ft high cement wall around the sump hole? The sump hole is in one corner of the basement and what I had in mind was to build two cement walls against the foundation to make a square retainer wall. Has anyone ever heard of someone doing this? Are their any other ideas? I know I'm probably crazy for even thinking of finishing the basement, but doing nothing with the available space makes me sick.
Old 01-18-02, 08:24 AM
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You have clearly more than 2 to 3 times more protection than most people have. You even gone as far as having a battery backup. You can take it a step further by buying a backup sump pump in the unlikely event that both would fail at the same time. You should see the sumps work periodically and if they don't, let's say for a month, I would recommend you pour water into the well to see if they're operational. As far as building a wall around the sump well, if the water got that high due to the failure of the pumps, it would find its way into your basement elsewhere. In my opinion, based on what is already existing, use the basement.
Old 01-22-02, 07:27 AM
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Sump Pump Retaining Wall

I feel your pain! We also have an unfinished basement and have gotten water in it three times since we moved in three years ago. We have a terrible water problem in the back yard. One time, we got water in through the basement windows because there was so much snow out back, and then we got rain. I was up to my shins in water in the back yard.

Another time, we got water when during a big storm, we lost power, so the pump couldnít work. I installed a battery back-up.

I thought about installing a wall around the sump pump hole as well. Iím writing now because of the last time we got water. It rained so hard, that both the AC and DC pumps couldnít keep up. So, it overflowed the hole. BUT, it also seeped through the cracks in the floor. If I had installed a wall around the sump pump, there would be nowhere for the water on the floor to go.

So I think it would be a bad idea. As much as I hated to push the water to the hole all night, it would have been a lot worse if I had to bail it out.

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