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andix 4 days ago

Not only trees in cities do that. A lot of clogged home sewers are caused by trees that wanted more to drink. Once the sewer line is fully blocked, they've arrived in paradise. Now there is a constant supply in the permanently filled sewer line.

topspin 4 days ago | parent | next [-]

I use to live on a property in a development. On my property were a pair of big willows. The trees were large and healthy, well over 50' tall. That was strange, because the region is high desert with little water, and I made no effort to irrigate them.

One morning in spring, after I'd been living there about 15 years, the neighborhood streets flooded. There were geysers of water shooting up from manholes. Turns out, the willows had been planted over an irrigation ditch[1]. The willows had driven their tap roots into the pipeline and plugged it about 10' underground. When the water authority opened gates miles upstream, the water pressure blew water up the manholes into the streets and a few yards.

Farmers are very motivated to get their water. They, and the ditch company, rapidly cleared the plug and removed the trees.

Before this happened I had no idea the irrigation system ran through the property. I knew about an easement, but I thought it was for sewage, because the developer used an iron manhole cover from the local municipal waste management operation when they covered the irrigation ditch: it literally had "Sewer" cast into the iron.

[1] Formerly an actual ditch, later made into a pipeline and covered over, but still technically a "ditch" for purposes of water management.

Chris2048 4 days ago | parent [-]

> They, and the ditch company, rapidly cleared the plug and removed the trees.

Did they need your permission to remove the trees?

topspin 4 days ago | parent | next [-]

No: the ditch company had the easement and the right to deal with their ditch and its problems. They dealt with me fairly and covered all the costs: I feel pretty fortunate that no serious damage to my or other peoples property occurred. That part was luck.

ahmeneeroe-v2 4 days ago | parent | prev [-]

No OP, but likely the easement allowed them to do it. Just like the power company will trim your trees without asking.

bigstrat2003 4 days ago | parent | prev [-]

Or at least, constant supply for the several hours it will take to call a rooter company and clear the drain line. Ironically, the tree would have better results if it only partly blocked the drain. I wonder if trees might ever evolve to strike that kind of balance, or if there's not enough selection pressure for that to happen.

lelandbatey 4 days ago | parent | next [-]

Watch out, some tree roots may be stronger than the rooter used to clear them, in which case the rooter company may end up with a rooter trapped in your pipe, as happened to my parents. Ultimately they had to get the sewer line excavated and replaced where it met the city sewer, 15 feet down in the middle of the road. Cost like $30k.

Maybe ask the rooter company what happens if they end up with equipment trapped jammed down your pipe is all I'm saying.

FireBeyond 4 days ago | parent [-]

That to me seems like something that should be covered by the company's insurance.

Any services company that comes out, ens up with breaking their tools because they used inadequate tooling, and causing more damage? I don't know how they managed to foist that on to your parents.

The issue wasn't the tree roots, it was the rooter company's poor investigation. Video scoping a sewer line is trivial these days.

lelandbatey 4 days ago | parent [-]

Oh, they video scoped the sewer, and my parents (father is a lawyer) went after them. Ultimately, the rooter company decided they'd rather go for the full legal battle and my parents decided "eh, we know how awful a legal battle is, we'll back down and not sue."

andix 4 days ago | parent | prev [-]

Sure, but it seems like trees are quite dumb, they don't think that much ahead.