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Re: [TowerTalk] FW: Concrete Pad for U.S. Tower TX-472

To: Patrick Greenlee <patrick_g@windstream.net>
Subject: Re: [TowerTalk] FW: Concrete Pad for U.S. Tower TX-472
From: <ve4xt@mymts.net>
Date: Sun, 26 Jul 2015 15:09:52 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I hope to pour in August, but I too have water. If it's only a few inches, is 
it worth worrying about?

73, Kelly
ve4xt 

Sent from my iPhone

> On Jul 26, 2015, at 13:31, "Patrick Greenlee" <patrick_g@windstream.net> 
> wrote:
> 
> My next tower install is coming late this summer or early fall (depending on 
> when the tower is built/shipped.  I fully expect the hole 4x4x8 ft to at 
> least partially fill up from ground water if I don't take precautions.  Even 
> during the recent record setting drought I had ground water within 5 ft of 
> the surface but this is NOT a drought year.
> 
> Boat launching ramps are poured into forms fully submerged as concrete easily 
> displaces the water without being "watered down." My concern is that the 
> walls of the hole, if significantly soaked, may collapse. So I may put a sump 
> pump in the hole with a float switch to keep the water pumped down to a 
> couple inches.  I'll build a little cubical wood frame and cover it with 
> geotextile to filter out solids and not let the pump clog.
> 
> Patrick     NJ5G
> 
>> On 7/25/2015 11:14 PM, Roger (K8RI) on TT wrote:
>> I had no problem keeping it wet.  The spring water table was just a couple 
>> inches below the surface. We kept a sump pump running until the concrete was 
>> being poured into the hole.   It was a good dry mix relatively speaking, yet 
>> when the concrete reached the top, it was pushing out water.
>> 
>> As I was breaking up the over flow a couple weeks later, someone asked, 
>> "Wouldn't it be easier to just paint it green?"  The dirt under the hardened 
>> overflow was still soggy.  So other than sprinkling the surface, keeping it 
>> wet was not a problem<:-)
>> 
>> 73
>> 
>> Roger (K8RI)
> 
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