It's probably better for this to be forwarded to the US mailing list (I'm not subscribed myself) or a relevant CloudMade officer.
Young geocachers in Ontario have been mapping fire hydrants (and last year 'farmland properties' for the County Planning Office. http://www.mpnnow.com/news/x1434780231/Mapmaking-in-the-digital-age Would make sense for someone to get in touch with them so they can map anything/evverything for OSM and then give the OSM data to the planning office.
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