pacific topsoils has various locations throughout the metro area, including 6000 S 129th in tukwila and just east of aurora on N 107th.
http://www.pacifictopsoils.com/
i think they charge $30 per yard to drop off broken concrete.
PTS will also deliver a "rock box" (10-yard dumpster) to your property if you have bigger quantities. they drop it, you load it, they pick it up. same deal with waste management. street use permits may be in order for those, unless you have an accessible driveway or yard.
there's also that gigantic place on SR900/MLK near skyway. contractor's concrete recycling, i believe. don't know about prices for getting rid of concrete, but i have bought used bricks there.
i reused my broken concrete and made a second patio space. i laid it out on paver base in a flagstone pattern and spread colored gravel between the pieces. it's permeable, it looks nice, i didn't have to pick it up 8 times or pay to get rid of it, and i kept it out of the dump.