Guidance on Outfall Mapping: “What is an Outfall, and …
storm sewer system discharges to either the Waters of the United States or to another ... drain to the Waters of the United States or to another MS4’s system are not considered ... discharge to a waterbody through a bridge abutment or wall of a cross-culvert that conveys a stream. Similarly, stormwater in ditches, swales, or gutters may ...
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