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The DNR has developed a statewide map of karst terrain that producers can check to determine if a potential animal feeding operation site would be located near a sinkhole or in karst terrain. Instructions for using the karst maps are available on the DNR AFO Maps site. See karst requirements below for confinements.
Karst Requirements for Confinement Feeding Operations: The Iowa Administrative Code prohibits new, expanding and modified confinement operations from constructing unformed manure storage (earthen basins) in karst terrain.