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Tile and land lords
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JDpastor
Posted 4/15/2025 23:03 (#11190750 - in reply to #11189704)
Subject: RE: Tile and land lords



gpsdude - 4/14/2025 22:24

Briarpatch - 4/14/2025 21:49

I would start with making sure you have an adequate outlet (IE: 1/2" drainage coefficient) before investing your or the landlords dollars- then go from there.


I would be willing to bet at least 70% of the footage the company i work for is designed at 1/4" DC. At least one watershed district in WC MN cannot be designed greater than 1/4" and get the permit required. I design anywhere between 1/4" and 1" depending on annual rainfall, crops grown, budget, and regulations. I would take a 1/4" capacity outlet over no tile at all if I needed tile.


On those projects where you design for 1/4 drainage coefficient, has the surface drainage been taken care of by means other than tile? I see a big difference between 1/4 coefficient with no surface water vs 1/4 where it has to take away ponding. We addressed an issue for a customer a few years ago where his main was way too small for all the ponding he was getting, but upsizing the main was not feasible, so we moved some dirt so that the water no longer ponded and then his tile was able to keep up very well.

I am also convinced that many of the projects that I have designed for 3/8 to 1/2 actually can take more than that. For example, if we have a main that is designed for 1/2, but all the laterals come in 6" above the main, then that water drops enough to give it some extra push and it will actually flow more than 1/2". I am not certain how much credit- if any- we should give for that, but I am convinced it does make a difference.

Edited by JDpastor 4/15/2025 23:08
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