Salmon spawn in a STREAM, not a SPRING. The difference is that a spring means that it's coming directly out of the earth... you pick it up there. It has just come from the best and most wonderful (and tasty) water filtration system in the world: the porous rock. Salmon cannot spawn in this, unless they have the ability to move through rock.
And I know the company knew better when they put out that ad, so they're just being seriously low and playing on the ignorance of the American people.