During excessively high rainfall periods Iowa producers with open manure storages should closely monitor manure levels to prevent these structures from over-topping. If manure levels in storage ponds or tanks approach full capacity producers should make plans to remove manure from these structures. The over-topping of bermed earthen storage ponds and lagoons could result in breaching of earthen berms and loss of the structures. Producers should transfer manure from full storage structures to alternative storage if available during saturated soil conditions since land application of manure to saturated soils could result in run-off into surface waters.