This study evaluated the potential for nutrients to run off from a headland stack of poultry manure into surface waters over 12 months. No runoff events were observed. The high water holding capacity of poultry manure meant rainfall was absorbed into the stack. Moisture levels were highest near the surface and decreased deeper in the pile due to composting heat. Thick vegetation around the stack also facilitated rainfall infiltration into the soil. Soil sampling after removal found higher ammonium and phosphorus levels underneath the stack. The study concluded headland stacks pose minimal risk to surface waters if sited properly away from concentrated water flow.