Iowa Code § 459B.301: Stockpiling — air quality.

A person may stockpile dry bedded manure, subject to this section.

1. Except as provided in subsection 2, a person shall not stockpile dry bedded manure within one thousand two hundred fifty feet from a residence not owned by the titleholder of the land, a commercial enterprise, a bona fide religious institution, an educational institution, or a public use area.

2. A person may stockpile dry bedded manure within a separation distance required between the stockpiled dry bedded manure and an object or location for which separation is required under subsection 1, if any of the following apply:

a. The titleholder of the land benefiting from the separation distance requirement executes a written waiver with the titleholder of the land where the dry bedded manure is stockpiled.

b. The stockpiled dry bedded manure originates from a small animal feeding operation.