Hmmmm, I was gonna just edit my post to take out the challenge to the River Police because I had already made the rivers thinner and removed the delta.
I think in general you are correct (much gnashing) but it isn't a 100% deal. I only did a little research and came up with the Tech river. It starts over 125 miles away from the coast. The reason for this was that it was the main course at one time. by the way attached is the latest. Gonna change the southern river