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401 vs 404 Permit
Engineering

401 vs 404 Permit

Section 404 is the Corps dredge-and-fill permit. Section 401 is the state water-quality certification that federal permit needs.

What Is the Clean Water Act
Engineering

What Is the Clean Water Act?

The Clean Water Act is the federal law behind 404 wetlands permits, 401 certifications, and NPDES stormwater permits.