And on further reflection, it occurs to me that Zion Hill is probably not the only potential move-in site for 99.5. Nobody (including me) has mentioned the 93.7 site in where?--Saugus, I think. Is WMKK directional? (Somebody here HAS to know; I don't.) When it moved down from Lawrence (or wherever--I believe the CoL is still Lawrence), I know that 93.7 might have had issues with 93.3 (Taunton) and 94.1 (Providence) (and isn't there a co-channel station in CT?). Nevertheless, those issues didn't prove fatal. Is 99.1 (N Plymouth) closer to Saugus than Taunton is? I suspect that Saugus is still too close to all of those stations that Scott named for 99.5 to move there without using a DA, but the DA would probably not have to be quite as directional as it would have to be at the Woburn site that we were discussing, so Saugus might prove to be a better location.
I think Lowell is a little further from Saugus than Lawrence is, which might mean that 99.5 would have a problem city-grading its CoL from Saugus, whereas 93.7 has no such problem. But since Lowell is home to two AMs and a non-commercial FM, changing the 99.5 CoL, if necessary, ought not be a major problem.