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9, Minnesota Technical Guidelines for Pollution Control Stockpiling of Manure Agency Feedlot Program Feedlot Rule Revised: March 20, 2001 Summary Stockpiling of manure is a common animal units requires a construction method of storing solid manure(defined short form permit. A NPDES/SDS as having at least a 15 percent solids permit is required if the site contains content or able to hold a 3-1 ratio when manure from 1,000 or more animal units. Contents stacked) and used as bedding/litter until Definitions Site selection it can be applied to cropland as fertilizer. Karst Topography: Found in Short-Term Stockpiles southeastern Minnesota where the soils Permanent Stockpiles This method is generallyused bysmall are shallow and layover fractured or Cohesive Soil Pads horse, dairy, beef and poultry operations cavernous bedrock. Sinkholes, caves because their size makes the expense of and rock outcroppings are common a manure storage structure prohibitive. features of this type of topography. This This fact sheet describes Minnesota rules area is very sensitive to ground-water for stockpiling manure at both feedlot contamination. and land application sites. Environmental Impacts Definitions Stockpiling of manure can be a For clarification, the following terms reasonably environmentally safe method used in this document are defined below. of manure storage if site selection is carefully considered. When rain or Manure Storage Area: Area where snowmelt water comes in contact with MPCA Area Offices: Rochester area: animal manure or process wastewaters manure, the water can pick up particles 507/285-7343 are stored or processed. Short-term and of manure and manure leachate and Mankato area: permanent stockpile sites are manure transport it off-site. The pollutants can 507/389-5977 Marshall area: storage areas. Stockpiles can be be solids that are visible to the naked eye 507/537-7146 classified as short-term or permanent, or dissolved nutrients,pathogens or Willmar area: depending on how long the stockpile is oxygen-demanding materials that cannot 320/214-3786 Detroit Lakes area: stored. Short-term stockpiles must have be seen. 218/847-1519 the manure removed and land-applied Brainerd area: within one year of the date when the As manure-contaminated water leaves 218/828-2492 Duluth area: stockpile was formed and permanent the site, some of it flows overland and 218/723-4660 stockpiles can be stored for over a year. some seeps into the ground. Depending Metro area: Short-term sites do not need a permit, if on the site,this water may flow to 651/296-6300 Toll-Free Number: the owner is not the owner of the feedlot. surface and/or ground water. Both can 800/657-3864 Construction of permanent sites have significant negative impacts on Feedlot Service Center: containingmanure from 300 to 999 water qualityand human health. 877/333-3508 wq-f8-06 Minnesota Pollution Control Agency, 520 Lafayette Road North, St. Paul, Minnesota 55155-4194 (651)296-6300,toll-free(800)657-3864,TTY(651)282-5332 or(800)657-3864 This material can be made available in alternative formats for people with disabilities. Printed on recycled paper containing at least 20 percent fibers from paper recycled by consumers.