[lupusreal]

Why should anything be done to reduce leakage? They take water out of the St Lawrence and, as much isn't diverted by trees, it goes back in (cleaner then when it came out.)

[bluGill]

Because trees will clog those pipes eventualay and then we must dig them up. Pipes that don't leak don't attract roots and so last longer

[cowsandmilk]

You have to dig them up to fix the leaks…