Kevin: When I said the west coast I was meaning right on the Pacific Ocean. Portland, Seattle, Vancouver are all 60 to 80 miles from the coast and all have 50 KW stations.
Here, on central Vancouver Island, receiving a 630 Watt signal from Reedsport a distance of about 450 miles would be all but impossible. I was surprised that Reedsport had a 50 KW station as it is a very small town.