Garbage dump

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v50.14 · v0.47.05 This article is about the current version of DF. Note that some content may still need to be updated. More Info · V

Garbage dumps are used most often for clearing out large areas of leftover stone - for instance, when constructing a stockpile.

Garbage dumps are activity zones in which dwarves will throw items marked for dumping - either with by using k-d (one item at a time), or d-b-d (bulk dumping; note that this designates all items on the tiles for dumping, even built furniture and items inside containers). Garbage dumps are not the same as refuse stockpiles, which can be designated to accept specific type(s) of refuse, such as animal corpses or bones, and then are automatically filled by haulers whenever the items appear on the map. Despite the name, garbage dump zones are useful for many things beyond garbage disposal; they can create quantum stockpiles, transport materials to a job site, send items to the trade depot when no caravan is present, drop rocks on enemies below, and numerous other uses.

The garbage dump may be inappropriately named, as it's more of a matter compression zone. The specifics are beyond human understanding; however, dwarves are in fact capable of compressing an infinite amount of matter into only one tile, as long as it is specified as a garbage dump. If for some reason Urist is yet again incapable of locating his favorite pair of cave troll leather socks, he should think to look among the black hole of matter that is the nearest garbage dump, as they could be snugly lodged between a few billion rocks.

Garbage dumps only accept items that have been marked for dumping, require dwarves to have refuse hauling labor enabled, and are subject to refuse standing orders (o-r). Most notably, dwarves will not dump items that are in a tile marked "Above Ground" unless you allow them to (o->r->o). To place a garbage dump, trace a zone on either a relatively empty plot of land or adjacent to a cliff face or hole. If a garbage zone is designated beside a cliff or hole (both natural or dwarf made) garbage will be thrown off/in the z-space. Each ground tile within that zone is considered a garbage dump tile; thus, if you want to place a single-tile zone, place the zone onto a ground tile (optionally adjacent to a cliff or pit), not onto an open space. Items dumped into magma that are not magma safe will permanently disappear, which is useful for disposing of clutter and increasing FPS. Otherwise a single tile (either a dump zone, or the ground below the open space) will hold any number of dumped objects. Dumping items into magma can be dangerous due to the magma mist generated when objects fall into magma. It is advised to dump items into magma from a hole several z-levels up to avoid !!Dwarves!! running around the fortress.

Dumped items are automatically marked as forbidden, preventing dwarves from touching them. If you wish to use dumped items, you need to reclaim them. Press k to view the item and f to toggle forbid status. You may also use the reclaim designation to reclaim simultaneously all of the items dumped by using d-b-c and tracing the designation over the objects in question. If you designate items for dumping, but forget to mark an active garbage dump, your dwarves will continue hauling / using the item, until an active garbage dump is marked.

If a garbage dump is located next to open space, dwarves will always stand on a garbage dump square when throwing into that open space, even if it could potentially be done more efficiently. If a garbage dump is located next to multiple tiles of open space, they seem to prefer the one farthest to the northwest. If a tile to the north and a tile to the west are the only tiles available, they will throw to the west. Such garbage dumps can be a very efficient method of moving materials to the lower levels of your fortress. However care must be taken to prevent dwarves and livestock from being struck by falling objects, perhaps with traffic designations and pastures. Dwarves usually throw dumped items in the nearest available garbage dump, although this is not an ironclad rule. If a nearer zone becomes available after they have already started the job they will ignore it. They also have a preference for open space dumps.

Probably due to a bug, dwarves occasionally ignore items that are meant to be dumped; viewing the item by pressing k then toggling forbid and dump status on, then off again (f-f-d-d) seems to correct this problem. Dumping items requires the 'refuse hauling' labor; items located in an "outside" tile should not be moved unless 'gather refuse from outside' is enabled in your standing orders. However, due to a bug, the logic is inverted; items located in an inside tile will not be moved unless 'gather refuse from outside' is enabled.^{Bug:8313Bug:8321}

Garbage dumps are great space savers because they can hold an infinite number of items on one tile; with some micromanagement they can even compress large, one-item-per-tile stockpiles into single-tile quantum stockpiles (although this requires additional work and is usually considered an exploit). The most common use for garbage dumps is for cleaning away loose stones left in your fortress by your miners: mark them for dumping, wait for the jobs to be completed, and then reclaim them (d-b-c) for use by your stonemasons; bonus points if you do this next to a stoneworking workshop and then re-designate the tile as a stone stockpile. If the dump is designated inside a workshop, the workshop will not become cluttered. However, if you put a garbage dump inside a magma workshop with the intent of dumping ores there, make sure the zone does not overlap any open pits of magma you may have carelessly left around, or as per intended behavior, items will be dumped into the magma.