You are doing White Co a diservice to take channel 18 off our line up. That is where we get our local news and local weather! We pay enough that you should provide 18. Also it's a shame you discontinued pbs and the Southbend station. Please rethink and negotiate a solution sooner rather then later.
As mentioned in other posts, TV stations have Designated Market Areas (DMA). If you are in one stations's DMA, they can force out-of-market stations off of cable/satellite systems.
You can see a list of DMA's here: