View Full Version : ? Drainage tile
06-14-2004, 01:23 PM
I have a client that wants me to put a drainage tile in on a part of his property. About 45' by 8". He feels it is easy, I have told him, I have seen it done only a couple of times, but he insists I can do it.:dizzy:
If you think it is even possible, what is a going per foot cost to put a a 45' drainage tile system?
06-14-2004, 01:28 PM
An old estimating guide says that you can hand dig the width and depth of a shovel, lay pipe, and cover 5 feet per hour. 45 lf divided by 5 f/hr equals 9 man hours. Times that by your hourly and presto, you have a job. Chances are you can dig faster than that, but then you can make possibly make good profit.
06-14-2004, 02:46 PM
OK.What are you draining?Where are you discharging?
It is easy,but 45' does not need to be dug by hand.You need a backhoe or at the very least,a trencher.You need to drop your grade about 1 inch for every 10 feet,so at 45' you need to be about 4.5 to 5 inches lower than where you start.
Give some more info and I'll try to help ya.
06-14-2004, 05:09 PM
Customer lives near a lake. He drains his pool water as it cycles in a spot between his and his neighbors place. Its a wet area all the time consequently. He planted two pine trees (about 12-14') a several years ago thinking this would help. Now he wants the drainage to flow towards the lake from the trees (which he would like removed also!) and there is already a slope... better than one inch to ten feet.
I think I may use a trencher, but not sure other than that (even that) is open to your words of wisdom.
The trees are at the begining of the 45'. I think I could cut then down and grind the stumps? Normally I would not mess with trees, but they rather small, with easy access.
06-14-2004, 05:17 PM
.... And also... I am going to dig a large hole... is it called a french drain?... filled with stone as the end point. I think the length of the run should be enough. It is not THAT wet, and that is what the customer wants.
06-14-2004, 08:21 PM
The gravel filled pit at the end is called a dry well.A french drain is a trench lined with drainage gravel to allow the water to flow from one point to another.Most folks now use drainage tile in the trench as well as the gravel.
Here's what I'd do.
1.If you can discharge the water into the lake do it.
2.If the area that is staying wet is very large,say 8 feet or more,run trenches across the area like tree branches(only straight).Then tie them into one trench running the 45' towards the lake.
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3.Hope you can understand that.
4.Next line the trench's with gravel.Place a drain tile sock over the tile and install the tile.
5.Next cover the tile with gravel and then place a soil barrier on top.
6.Now cover with soil.
Leave around 4 inches of topsoil over the trench so the grass will have a place to root.
If any way possible,I'd rent a front end loader.You're going to have alot of dirt left over and you'll need a way to remove it and haul it,unless the homeowner wants it used somewhere.
Remember,you're substituting soil with gravel and pipe,so you're going to have that much soil left over.
Also,get a ride on trencher.You can see how much more digging you're going to need to do in order to correctly drain the water.Better yet would be a backhoe,especially if you decide to go the dry well way.I HIGHLY recommend discharging the water if possible or you're only going to move one problem to another area.
06-14-2004, 08:22 PM
that didn't turn out well.let me try it again using another method.
06-14-2004, 09:02 PM
Here's a quick 3D view of what I'm talking about.Hopefully you can get an idea from this.
The two pines are the starting point and it discharges into the lake.
06-14-2004, 10:18 PM
Thanks for the help. The entire idea (except the feeding into a single pipe from six) was what I had in mind. But, I had not thought of the excess soil!
Thanks for the very clear and enlightening advice.
06-15-2004, 07:49 AM
If you know where the pipe from his pool is,you can directly hook the drainage pipe to it and drain it towards the lake.You wouldn't need the extra pipes to drain the soil.
Then it's the same thing.dig trench,lay gravel,insert pipe with pipe sock(holes downward),cover with gravel and topsoil.
06-15-2004, 08:54 AM
I got the end of the discharge pipe from the pool. It is only a 2" pvc pipe and it barely sticks out of the ground. That is a great idea, connecting it directly to the drainage tile.
06-16-2004, 09:33 AM
If you are connecting the discharge from the pool and draining directly to the lake, I doubt you need to use perforated pipe. Solid pipe should work fine. You still need to make sure that the pipe has the appropriate "fall" from beginning to end though.
One more thing, GET THE UTILITIES LOCATED. Call Holey Moley, I see you are in IN. It's a free service, you call them and in 2 days all of the member companies should have the utilities located for you.
If it's a 2" PVC pipe, you ought to be fine with 4" corrugated as the final drain line. Adapt the 2" into 4" PVC, then use an internal coupler inside the 4" to connect to the corrugated. Tape the joint with either duct tape or black tile tape.
If you are only connecting the pool drain to the 4" tile, you should be fine with just a trencher, probably a walk-behind. Better yet, rent a Dingo/MT50 with a trencher attachment and use that to backfill the trench.
HTH. If you need the number for Holey Moley, let me know.
06-16-2004, 09:45 AM
I dont know about Indiana but, here in Michigan it would be a BIG no no to discharge a pool into a lake. The DNR would slap a fine on you so quick it would hurt. I dont think would like the idea of chlorine being discharged into the lake. I would check it out. As I said I dont know about Indiana! I would check it out for your own protection!
06-16-2004, 12:55 PM
I am not going to discharge into the lake. I am going to create a drywell at the end of the run, using perferated pipe. I think six inches wide will be enough. But not into the lake.
Felix- Thanks, I have the number for the utilities locators. Appreciate it.
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