Manure was washed by rainfall from a cattle feedlot near Elma. (Photo courtesy of Iowa DNR)A smaller cattle feedlot in northeast Iowa likely polluted a creek for years during heavy rainfall, according to the Iowa Department of Natural Resources.The feedlot near Elma, owned by Curtis Fox, has about 650 cattle and is small enough that it’s not required to have a state-approved plan for managing its manure. It is, however, prohibited from discharging manure into the state’s streams.Its existence was discovered by the DNR in 2018 as part of the department’s ongoing efforts to monitor livestock...…Manure was washed by rainfall from a cattle feedlot near Elma. (Photo courtesy of Iowa DNR)A smaller cattle feedlot in northeast Iowa likely polluted a creek for years during heavy rainfall, according to the Iowa Department of Natural Resources.The feedlot near Elma, owned by Curtis Fox, has about 650 cattle and is small enough that it’s not required to have a state-approved plan for managing its manure. It is, however, prohibited from discharging manure into the state’s streams.Its existence was discovered by the DNR in 2018 as part of the department’s ongoing efforts to monitor livestock...WW…