Excavation or Placement of Fill in Navigable Waters and Adjacent and Contiguous Wetlands

dredge pictureA permit is required to excavate or fill navigable waters or marshes and other wetlands adjacent to navigable waters. This includes maintenance dredging of navigation channels and underwater mining operations. New York State regulates these activities under their Protection of Waters Permit Program. The U.S. Army Corps of Engineers uses Section 10 of the Rivers and Harbors Act of 1899 as authority to regulate structures in or over navigable waters. Under this act, the Corps also regulates dredging and filling and any other work affecting the course, location, conditions or capacity of navigable waters. Normal farming activities and forestry practices generally are exempted from the Section 10/404 Program. Visit the U. S. Army Corps of Engineers web site: Permits for Discharges of Dredged or Fill Material Into Waters of the United States.

For permits for work in Lake Ontario, the Corps and the NYS DEC have a joint permit application form which allows an applicant to file an application at either office. However, the two agencies have separate regulatory programs and approvals are required from both offices before proceeding with the proposed project.

The following is from the NYS DEC Protection of Waters Permit Program web site:

Regulated Activities
Navigable waters include lakes, rivers and other waterways and water bodies on which water vessels with a capacity of one or more persons are operated or can be operated. A Protection Of Waters Permit is required for: Excavating or placing fill in navigable waters of the state, below the mean high water level, including adjacent and contiguous marshes and wetlands.

Some examples of activities requiring a permit are:

  • installation of support piers (larger than 12" in diameter) and cribs for docks or boathouses;
  • placement of fill for access, construction or structure installation (i.e., bridges, culverts, pipeline crossings);
  • excavations associated with construction activities and dredging for navigation channel establishment or maintenance;
  • sand or gravel mining.
Exempt Activities
Waters that are surrounded by land held in single private ownership at every point in their total area are exempt from the requirement to obtain a Protection of Waters Permit for Excavation or Placement of Fill in Navigable Waters.


New York Sea Grant I SUNY Oswego I Oswego, NY 13126
315-312-3042
Designed by Molly Thompson, Dune/Habitat Educator
mat36@cornell.edu