Dear Dan:
I assume that the slope of the land is away from your house, so my question
is, why not simply dig a drain ditch and put in a drain line to a point where
the grade drops below the level of your pit, and then cover the ditch? A
drain could be installed in the concrete pad to connect to the drain line.
Since this is not gray water, I would think that code would permit, but I live
in the country where the land owner's designs are left to the land owner, in
all but the most extreme cases.
Yours Truly,
Clifford Wilson
----- Original Message -----
From: Dan Rossi
To: Blind Handyman List
Sent: Tuesday, June 23, 2009 11:37 AM
Subject: [BlindHandyMan] Hydrology
OK, so does anyone know anything about hydrology? I have started digging
my basement door. I actually got further in 2.5 hours last night than I
expected.
My concern is drainage of the pit. I will slope the slab away from the
house and put at least four inches of gravel under the slab.
Here is a question. The slab will be about 24 inches below grade. If I
were to use a power auger and bore a couple of 12 inch diameter, three or
four foot deep holes at the low end of the slab, (obviously before it is
poured), and fill those vertical holes with sand and gravel. And if
the upper ends of the shafts were open to the slab. What would
happen when it rains? Would water from the surrounding soil just fill the
vertical shafts preventing water from the slab to drain into the shafts?
That would make the shafts pretty useless.
What would happen if I fitted 12 inch diameter PVC pipe down into the
shafts, assuming you could find pipe that big. That would prevent water
from the surrounding area from flowing into the shafts from the sides, but
the bottom would still be open. Does that make any difference?
OK, the real real question here is , is there anything I can do to prevent
my door pit from becoming a swimming pool? The best solution I can come
up with is illegal. The down spouts for the house are tied into the
sanitary suer system, the house is grandfathered for the time being. I
could try and tie the drain for the pit into the same drainage for the
down spouts. I am not allowed to do that, but if no one is looking. dot
dot dot.
I am willing to do whatever it takes to do it right, it's just a matter of
more work and probably a bit more money, I am just not sure what will be
the best solution.
OK guys, let's hear what you've got.
--
Blue skies.
Dan Rossi
Carnegie Mellon University.
E-Mail: [email protected]
Tel: (412) 268-9081
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