So he can dump motor oil into the lake if he wishes?
There are certain EPA restrictions against unregulated dumping of petroleum products.
No because the motor oil would seep into the groundwater and harm others. If he can seal the lake and prevent runoff, and prevent animals/people from getting into it, then yes he could dump oil in it. What the hell is the point of that statement, anyway?
Unless they were to find endangered 3 legged pink furry flying bat frogs living there,that would open up another can of worms,otherwise I expect the "lake" owner to grow tired and just fill it in and develope it....;-)
Is he allowed to or should he be able to? The government has the power and the guns to make him refrain from that, but it isn't his property if he isn't allowed to destroy the value of it.
You are right about one thing, there is no private property in this country.