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Old 08-25-2019, 10:03 PM   #1
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Installing drainage without natural slope


I have removed the concrete patio and am putting in a little patio sloping away from the house. The previous patio sloped towards the house and onto the driveway. However, the drainage in the middle of the lawn was still poor and water congregated there after sprinklers ran or rain.

Now after removing the concrete the water is congregating near the hardened soil close to the house. I kind of just left the hose running and the elevation is super low without a patio installed so this is a bit extreme, but I want to build some kind of french drain that goes onto the driveway, but the driveway is basically at the highest or level elevation to the lawn...

I don't want to get real complicated and dig a super deep trench onto the side of the house , under a sidewalk and drill a hole in the concrete onto the street. I don't even know if my county allows that.

So please take a look at the pics and give me suggestions for how to install a good drainage system or if I can somehow get the water to flow up and onto the driveway at the end. When everything is done the surface ground will probably be 6-8 inches higher than it is now and level with the driveway.

All help is appreciated.
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Installing drainage without natural slope-irrigation-drain-edit.jpg   Installing drainage without natural slope-irrigation-drain-edit-2.jpg  

Last edited by NatureFly; 08-25-2019 at 10:05 PM.
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Old 08-25-2019, 10:40 PM   #2
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Re: Installing drainage without natural slope


Is the fence in the background your property?

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Old 08-25-2019, 11:38 PM   #3
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Re: Installing drainage without natural slope


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Is the fence in the background your property?
Yes, it is , and on the other side is a tree , then sidewalk then a little grass then street. I can take a picture of the outside of the fence tomorrow.
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Old 08-26-2019, 12:44 AM   #4
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Re: Installing drainage without natural slope


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Yes, it is , and on the other side is a tree , then sidewalk then a little grass then street. I can take a picture of the outside of the fence tomorrow.
That appears to be a little sloped down hill so that would be where you want to deal with the water.
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Old 08-26-2019, 12:59 AM   #5
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Re: Installing drainage without natural slope


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That appears to be a little sloped down hill so that would be where you want to deal with the water.
Where would it exit? If I dig 12 inches below the fence, it would be below the curb.
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Last edited by NatureFly; 08-26-2019 at 01:07 AM.
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Old 08-26-2019, 01:03 AM   #6
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Re: Installing drainage without natural slope


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Where would it exit? If I dig 12 inches below the fence, it would be below the curb.
You would slope the area around the house to a drain and pipe out in the yard in a ditch full of gravel so it can seep into the ground or a big hole full of gravel. You would have find out if the dirt you have will absorb the water.
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Old 08-26-2019, 01:12 AM   #7
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Re: Installing drainage without natural slope


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You would slope the area around the house to a drain and pipe out in the yard in a ditch full of gravel so it can seep into the ground or a big hole full of gravel. You would have find out if the dirt you have will absorb the water.
Hmm... didn't think of a hole full of gravel. Very nice idea as the flooding isn't huge. Pic added.

The dirt is pretty hard clay from poorly maintained yard/grass over the past 5 years , not a good idea in extreme heat. The water does dissipate, but it takes the day to do so instead of the usual 2.

Really appreciated.
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Old 08-26-2019, 01:39 AM   #8
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Re: Installing drainage without natural slope


So a french drain is that lack pipe with holes in it often put around the house to collect water and then send out to a pump or ditch somewhere, or you start with the water source like a surface drain and then you use a leaky pipe to spread it out much like a field for a septic tank. Depending on the soil the drain might be longer or shorter or you can put in a drywell which is the hole full of gravel,
You start out with a peculation test or perc test to see what the soil will do,


Dig a hole 12" x 12" about 18 to 24" deep Hammer a stick in the middle and mark it 12" from the bottom. Fill the hole up to that 12" mark with water and time how long it will take to go down. So your answer would be 1 cubic foot of this much time.
And you use that to decide what needs to done from there.
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Old 08-26-2019, 07:04 AM   #9
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Re: Installing drainage without natural slope


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Where would it exit?
Unless you are putting a pump in, water flows downhill, so you need to find a low area. Don't trust your eye. Time to get out there with a laser, or even a string level and a couple of stakes, and figure out exactly how it slopes.
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Old 08-28-2019, 06:08 PM   #10
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I made a frenchdrain that led to a big drywell,with covered gravel, an I even dug a extra hole in it about 3 ft deep an 1-2 ft wide an used netted rock an sand in it for faster draining since it was much deeper than the main big hole..I then sloped it away at ground.
My hole was 6to8 ft wide an 4 or 5 ft deep so it takes a lot to fill it !
It functioned/s great in many huge floods .
But yea, measure the grades/slopes an locate low points .
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Old 08-29-2019, 03:40 PM   #11
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Re: Installing drainage without natural slope


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I made a frenchdrain that led to a big drywell,with covered gravel, an I even dug a extra hole in it about 3 ft deep an 1-2 ft wide an used netted rock an sand in it for faster draining since it was much deeper than the main big hole..I then sloped it away at ground.
My hole was 6to8 ft wide an 4 or 5 ft deep so it takes a lot to fill it !
It functioned/s great in many huge floods .
But yea, measure the grades/slopes an locate low points .
I got out there with stakes and measured all the low and high points today. It will have to exit below the fence seen in the picture as that is also the lowest point.

How deep were the trenches and catch basins? I am thinking of installing the drywell at the lowest point right at the fence... where the red line ends between 2 large trees. I won't be able to dig near the sidewalk due to county rules.
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Old 08-29-2019, 03:44 PM   #12
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Re: Installing drainage without natural slope


I think it should likely be on your property.
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Old 08-29-2019, 03:58 PM   #13
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Re: Installing drainage without natural slope


Also dealing with very, very hard soil in many areas. A layer of topsoil will be put on top for the grass, but otherwise it's not an easy dig.
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Old 09-05-2019, 12:09 AM   #14
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My trenches are 2 ft wide an about a foot an a half deep with a down slope toward the huge rockpit.Its good working, since the slope in bottom of trench is there reguardless of ground level~~---____
..
I also dug a few small exit routes at top of pit so after overflow it goes that way..
I also put a sump pump in pit to direct it if extreme ,but that's rare.
I changed the soil around the pit too adding sand an gravel an mulch,peat ,soil conditioner ,etc so it drains faster if overflow.
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Last edited by hidden 1; 09-05-2019 at 12:28 AM.
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Old 09-05-2019, 01:39 AM   #15
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Re: Installing drainage without natural slope


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Also dealing with very, very hard soil in many areas. A layer of topsoil will be put on top for the grass, but otherwise it's not an easy dig.
You can rent small back hoes, I didn't say it would be easy.
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