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Pump Containment Ponds Before Unpermitted Release Occurs

The recent rainfall and upcoming forecast are proving to be a challenge, not only for harvesting crops but also for livestock producers.

“If you are a livestock producer with a manure management system, you need to inspect your dirty-water containment ponds,” advises Mary Keena, Extension livestock environmental management specialist based at North Dakota State University’s Carrington Research Extension Center.

Keena says producers must maintain 2 feet of freeboard to accommodate a 24-hour, 25-year storm event in their ponds. If a pond is level with or measuring in the freeboard area, producers must pump the pond.

“After obtaining a sample of the containment pond water and sending it to a laboratory for nutrient analysis, you can pump onto cropland or hay land,” Keena says. “The nutrient content of the containment water is minimal, but it is still important to have it sampled and record the number of gallons applied so your nutrient management plan can be updated to include the pumping.”

Keena suggests producers follow an example of how to determine the amount of effluent to apply in the “Containment Pond Management” publication at https://www.ag.ndsu.edu/lem/resources/useful-publications.

“Allowing your containment ponds to overtop is not only a violation of your animal feeding operations permit, it is also cost prohibitive,” says Rachel Strommen, environmental scientist at the North Dakota Department of Environmental Quality. “The water leaving the containment pond via a breach may cause erosion that will be costly to fix. Also, when the water leaves on its own accord, it cannot be directed to a safe source (cropland) and can be the source of unnecessary pollution to waters of the state.”

Water that leaves the containment pond and enters waters of the state via a culvert, ditch, creek or other waterway is considered an unpermitted release, Strommen noted.

 

Source : ndsu.edu