459.311B  Stockpiling dry manure — minimum separation distance requirements and prohibitions.
  1.  A person shall not stockpile dry manure within the following distances from any of the following:
  a.  A terrace tile inlet or surface tile inlet, two hundred feet. However, this paragraph does not apply to a person who stockpiles the dry manure in a manner that does not allow precipitation-induced runoff to drain from the stockpile to the terrace tile inlet or surface tile inlet. A terrace tile inlet or surface tile inlet does not include a tile inlet that is not directly connected to a tile line that discharges directly into a water of the state.
  b.  (1)  A designated area, four hundred feet. However, an increased separation distance of eight hundred feet shall apply to all of the following:
  (a)  A high-quality water resource.
  (b)  An agricultural drainage well.
  (c)  A known sinkhole.
  (2)  Subparagraph (1) does not apply to a person who stockpiles dry manure in a manner that does not allow precipitation-induced runoff to drain from the stockpile to the designated area.
  2.  A person shall not stockpile dry manure in a grassed waterway.
  3.  A person shall not stockpile dry manure on land having a slope of more than three percent. However, this subsection shall not apply to a person who stockpiles dry manure using methods, structures, or practices that contain the stockpile, including but not limited to silt fences, temporary earthen berms, or other effective measures, and that prevent or diminish precipitation-induced runoff from the stockpile.
2009 Acts, ch 38, §10, 16