How to pronounce “sutter” in English

That's on Sutter.

And he had the good fortune of arriving 17 days before gold was discovered at Sutter's Mill.

So just to give you a feel for what it is, that's a picture of Sutter's Mill to give you an idea of what gold rush economics is about.

But they are covered by rivers in one place, which is the South Fork of the American River, which Sutter built his mill on.