Here in our City, the main dump is completely shut off from any gleaning. Bicycle-wise, the local civic government has an arrangement with their own bike co-op agency called "the Wrench'. They have a monopoly on access to any bikes dropped off at the dump. The bikes are saved for The Wrench, sorted and compiled, then taken back to main HQ where they are further worked on or parted down into storage. Many, many bikes are sold from there and some nice stuff shows up. All other bike coops in the City have to go hat in hand to them for their needs, unless of course private individuals donate directly to them.