Activities that may affect navigation on US waterways must be evaluated to ensure navigational capacity is maintained.
Placement of structures affecting course, location, condition, or capacity of navigable waters of U.S. (includes offshore wind within 3 miles of coast); exemptions exist)
Statute or Regulations:
Rivers and Harbors Act of 1899 (33 U.S.C. 401 et seq.) Section 10 (33 USC 403)