Dredging Permit Requirements, Reviews, and Penalties

Dredging permit requirements start with the U.S. Army Corps of Engineers. Any excavation, filling, or alteration of a navigable waterway or wetland needs federal authorization, and most projects also need a separate state water quality certification. Depending on the size and location of the work, you may qualify for a streamlined nationwide permit that clears in about 60 days, or you may face the full individual permit process, which typically runs six to twelve months.

When You Need a Permit

Two federal statutes drive the permit decision, and many projects trigger both at once.

Section 10 of the Rivers and Harbors Act of 1899 makes it illegal to excavate, fill, or alter the course or capacity of any navigable waterway without authorization from the Secretary of the Army, acting through the Corps of Engineers.¹ This is the permit covering the physical act of removing sediment from navigable channels, harbors, and rivers.

Section 404 of the Clean Water Act separately regulates the discharge of dredged or fill material into any waters of the United States, including wetlands. The Corps issues these permits too, but the EPA has oversight authority and can veto disposal sites.² If you’re excavating from a navigable waterway and putting the material somewhere, you need Section 10 authorization for the removal and Section 404 authorization for the placement.

If the dredged material is bound for ocean disposal, a third federal law applies. The Marine Protection, Research, and Sanctuaries Act requires a separate permit for ocean dumping. The Corps evaluates whether the dumping would unreasonably degrade the marine environment, and the EPA designates approved disposal sites and can block projects that fail its criteria.³

Whether You Qualify for a Nationwide Permit

Not every dredging project requires a full individual permit review. The Corps maintains a set of nationwide permits that pre-authorize categories of activities with minimal environmental impact. They are the faster path, and they cover more situations than most people realize.

Nationwide Permit 3 (Maintenance) authorizes repair, rehabilitation, or replacement of previously authorized structures, including removal of accumulated sediment in and around those structures. The sediment removal can extend up to 200 feet from the structure but is limited to restoring the waterway to its original dimensions. This permit does not cover maintenance dredging primarily for navigation purposes.⁴ Nationwide Permit 35 specifically covers maintenance dredging of existing marina basins, access channels, and boat slips back to previously authorized depths. All dredged material must go to an upland site unless the district engineer separately approves aquatic disposal.

If your project doesn’t fit within a nationwide permit’s terms because of its size, location, or potential impacts, you’ll need an individual permit. Individual permits involve a full public interest review with public notice, agency consultation, and case-by-case evaluation.⁵ The timing difference is significant: nationwide permits typically take 60 days, while individual permits target 120 days but run six to twelve months in practice.⁶

Even under a nationwide permit, some activities require a pre-construction notification to the district engineer. The notification must include a project description, delineation of affected waters and wetlands, drawings showing the work location, and any mitigation measures. Water quality certification and coastal zone consistency concurrence are still required.

Activities That Are Exempt

Some work is exempt from the Section 404 permit requirement altogether. Under the Clean Water Act’s exemption provisions, the maintenance of currently serviceable structures, including dikes, dams, levees, breakwaters, and bridge abutments, does not require a Section 404 permit, as long as the work doesn’t change the character, scope, or size of the original design.⁷

The incidental movement of dredged material during normal navigation dredging already authorized by Congress or the Corps is also exempt, but this exception does not apply to dredging in wetlands.⁷ The exemptions have hard limits. They don’t apply if the discharge contains toxic pollutants, or if the activity is part of a project to convert waters into a new use that would impair their flow or reduce their reach. Expanding a channel beyond its original footprint is not maintenance, whatever you call it.

What Goes in the Application

The federal application starts with ENG Form 4345, available through your local Army Corps district office website.⁸ The form requires a detailed project description with excavation methods and the anticipated work schedule, plus latitude and longitude coordinates for the site.

The technical package must include:

Plan-view and cross-section site drawings with clearly marked boundaries of the impact zone.
Bathymetric surveys establishing baseline water depths and the target post-dredging depth, so regulators can calculate the volume of material you plan to remove.⁹
Lab sediment analysis showing the physical and chemical composition of the material, which determines your disposal options.¹⁰
Specific coordinates for the proposed disposal location and an explanation of why that site is appropriate.

Applications missing any of these elements get returned, restarting your review timeline. The Corps recommends meeting with the district office during early planning on large or complex projects; that consultation helps you identify the right permit type and required environmental documentation before you invest in surveys and reports.¹¹

Federal application fees are set by regulation, not project size. Commercial or industrial projects pay a flat $100. Non-commercial projects, such as a homeowner dredging around a private dock, pay $10.¹² State agencies charge their own fees, which vary by jurisdiction. The real cost is not the application fee. It’s the surveys, sediment testing, and consultant reports the application requires.

Environmental Reviews That Attach to Your Permit

Once the Corps has a complete application, several parallel reviews kick in. Any one of them can add conditions, delay the decision, or block the permit.

Endangered Species Consultation

Because the Corps permit is a federal action, Section 7 of the Endangered Species Act applies. The Corps must consult with the U.S. Fish and Wildlife Service or National Marine Fisheries Service to ensure the dredging won’t jeopardize any listed species or destroy designated critical habitat.¹³ If listed species are present, you’ll likely need to submit a biological assessment, and the consulting agency may issue a biological opinion with conditions such as seasonal restrictions or monitoring requirements during the work.

Essential Fish Habitat

Projects in coastal and marine waters must address Essential Fish Habitat requirements under the Magnuson-Stevens Act. Federal fishery management plans identify dredging as an activity that can adversely affect habitat used by commercially important species for spawning, breeding, and feeding.¹⁴ The National Marine Fisheries Service reviews the project and issues conservation recommendations the Corps must consider.

State Water Quality Certification

Section 401 of the Clean Water Act requires a state water quality certification before any federal permit can issue. The certifying authority, usually the state environmental agency, evaluates whether the dredging will comply with state water quality standards, including limits on turbidity, dissolved oxygen, and contamination.¹⁵ Projects near seagrass beds, shellfish harvesting areas, or drinking water intakes get particularly close scrutiny. If the state denies certification, the federal permit cannot be granted. Coastal states add a further step: applicants must obtain a consistency determination under the Coastal Zone Management Act, certifying the work complies with the state’s approved coastal management program.¹⁶

Cultural Resources and Tribal Consultation

Section 106 of the National Historic Preservation Act requires the Corps to consider whether the project could affect properties listed on or eligible for the National Register of Historic Places. Applicants submit information about cultural resources in the project area, and the Corps consults with the State Historic Preservation Officer or Tribal Historic Preservation Officer as appropriate.¹⁷ Federally recognized tribes may also be consulted under Executive Order 13175. Skipping the cultural resource information at submission causes avoidable delays.

For individual permits, the Corps also issues a public notice describing the project and soliciting comments from adjacent property owners, agencies, tribes, conservation organizations, and local media.¹⁸ Regulators frequently follow up with requests for additional information, which pauses the review clock.

How Long the Permit Lasts

Permits for construction-type dredging specify a deadline for completing the work, and the Corps typically requires that work begin within one year of issuance. Ocean disposal permits cannot exceed three years.¹⁹

Maintenance dredging permits can authorize recurring work for up to ten years from issuance, but the permittee must notify the district engineer before each dredging event to confirm continued compliance. After the permit expires, a new application is required.¹⁹ Extensions are available if you request one before the permit expires and the district engineer finds no reason to deny it, though a new public notice may be required if circumstances have changed.

Penalties for Dredging Without a Permit

Enforcement is severe enough that obtaining the permit is always cheaper than getting caught without one.

Criminal Penalties

Violating Section 10 of the Rivers and Harbors Act is a federal misdemeanor. Conviction carries a fine between $500 and $2,500, up to one year of imprisonment, or both.²⁰

Clean Water Act violations carry steeper criminal penalties. A negligent violation, meaning you dredged without a Section 404 permit because you didn’t check whether you needed one, is punishable by a fine of $2,500 to $25,000 per day and up to one year in prison. A knowing violation, where you deliberately bypassed the permit process, jumps to $5,000 to $50,000 per day and up to three years in prison. Second offenses double those maximums.²¹

Civil Penalties

The EPA can impose civil penalties for Clean Water Act violations without going to court. The current inflation-adjusted maximum is $68,445 per day of violation.²² The Corps has its own administrative enforcement tools too, including compliance orders, permit suspension or revocation, and administrative penalty actions.²³

After-the-Fact Permits

If unauthorized work has already occurred, the Corps may accept an after-the-fact permit application, but this is not a guaranteed escape. The district engineer won’t process an application if legal action has been initiated, if a required federal or state authorization has already been denied, or if other agencies have started their own enforcement proceedings. The applicant must sign a statute-of-limitations tolling agreement, meaning the clock on potential prosecution stops until the Corps makes its final decision.²⁴ In some cases, the Corps requires full restoration of the affected waters instead of permitting the work after the fact.

1
Office of the Law Revision Counsel. 33 USC 403 – Obstruction of Navigable Waters Generally
2
Office of the Law Revision Counsel. 33 USC 1344 – Permits for Dredged or Fill Material
3
eCFR. 33 CFR Part 324 – Permits for Ocean Dumping of Dredged Material
4
Federal Register. Reissuance and Modification of Nationwide Permits
5
U.S. Army Corps of Engineers – Mobile District. Permit Types
6
U.S. Army Corps of Engineers. Permit Processing
7
eCFR. 40 CFR Part 232 – 404 Program Definitions; Exempt Activities Not Requiring 404 Permits
8
U.S. Army Corps of Engineers. ENG Form 4345 – Application for Department of the Army Permit
9
U.S. Army Corps of Engineers. EM 1110-2-1003 – Hydrographic Surveying
10
Environmental Protection Agency. Dredged Material Testing and Evaluation for Permitting Under the Marine Protection, Research and Sanctuaries Act
11
U.S. Army Corps of Engineers. Regulatory Program Applicant Information Guide
12
eCFR. 33 CFR Part 325 – Processing of Department of the Army Permits
13
U.S. Fish & Wildlife Service. ESA Section 7 Consultation
14
eCFR. 50 CFR Part 600 Subpart J – Essential Fish Habitat (EFH)
15
U.S. Environmental Protection Agency. Overview of CWA Section 401 Certification
16
eCFR. 15 CFR Part 930 – Federal Consistency with Approved Coastal Management Programs
17
U.S. Army Corps of Engineers. Section 106 of the National Historic Preservation Act
18
eCFR. 33 CFR 325.3 – Public Notice
19
eCFR. 33 CFR 325.6 – Duration of Permits
20
Office of the Law Revision Counsel. 33 USC 406 – Penalty for Wrongful Construction of Bridges, Piers, Etc.
21
Office of the Law Revision Counsel. 33 USC 1319 – Enforcement
22
eCFR. 40 CFR Part 19 – Adjustment of Civil Monetary Penalties for Inflation
23
U.S. Army Corps of Engineers. Compliance with Department of the Army Permits
24
eCFR. 33 CFR 326.3 – Unauthorized Activities