Stored liquids should be only a small fraction of the storage capacity because successful solid and semi-solid storages require excess liquids to be drained off. To estimate the required storage volume of manure and bedding, add the manure production volume to half of the bedding volume. Bedding volume is usually halved during use. Drain excess liquids. If animals have access to an outdoor lot and manure from the lot is not added to the solid or semisolid storage, assume half the daily manure production volume when estimating storage capacity.
Additional capacity is needed for drainage water, lot runoff, and, possibly, lot scrapings.