I'm afraid that I fail to see your point, or the relevance of the UHF TV band (old: 228 MHz [includes ch. 37], new: 138 MHz) being wider than the VHF TV band (lo: 34 MHz [includes the 4 MHz between chs. 4 and 5], hi: 42 MHz). It doesn't change the fact that no primary-rights (i.e., full power and Class A) TV station was forced to change bands; all band changes were voluntary and compensated. Again, all operational secondary-rights (i.e., LPTV and translator) TV stations were given a window in April and May to request their displacement channel reassignment. Nationwide, there were only 90 instances of mutually exclusive requests for displacement channels, five of which involved Oregon stations, and only one of which was in the crowded Portland metro area, involving two stations both requesting ch 23. But even in the Portland metro, there are still enough channels available so that every UHF secondary-rights station can still end up with a new UHF channel. In fact, KGWZ-LD is staying with ch 23, and KEVE-LD is now requesting ch 31, so that one is already resolved as of 11/29/18. There is no reason to believe that the Willamette Valley will be a problem.