To reiterate what's been said here, I would have to agree that there should be an active method for distributing current activities on caches that are archived. The current passive means do not seem to be working for many users.
given the two options of a email notification or searchable pq's; I would prefer to see the archived caches as an option in pocket queries. An email notification would remind me to clear out the caches from my list, but I would still have to manually delete them/mark them/rip them out of my binder.
Pocket queries are power tools by design. It gives us a way to find current information quickly and efficiently about multiple related caches. The current information on an archived cache is that it is archived. Although it is technically correct to say that the absense of data has meaning, it is not usually a good method for distributing information.
In the examples above, there is not a clear, simple (automated or programmatical) way to determine if a borderline cache did not show up in a poket query because it got beat out by a new, closer cache, or if it did not show up because it was archived. To be able to run a pocket query that returns recently archived caches, gives me a way I can update my current information by sorting the list and getting a positive response on an archived cache. I can quickly flip to that page in my binder and just trash that one page. I'm done.
The alternative seems to be to match each cache to a page and trash what's left. (the same theory applies to binders as the gsak database as the gps)
One last thing, and I'm done - Hymr, it would seem to me that it would be better service to your land managers to make sure that when you archive a cache everyone is notified quickly to stop looking for it. If I have already loaded your cache in my GPSr, I may still be looking for it weeks from now if I forget to check the page.