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A shoreline breakwater usually needs permits before construction begins. In the United States, the U.S. Army Corps of Engineers may require federal authorization under Section 10, Section 404, or both, while state and local approvals can apply on top. The answer depends on the water, the design, and the shore’s location—not simply on who owns the adjacent land. This overview reflects U.S. rules and agency guidance documented through November 13, 2026; it cannot determine the permits for a particular parcel.
Why does a breakwater trigger federal permits?
A breakwater is expressly named in the federal rules as a type of structure, and the rock or other material placed to build one can count as fill. As a result, a project in or affecting navigable waters may fall under Section 10 of the Rivers and Harbors Act, Section 404 of the Clean Water Act, or both. Either federal authorization can be required; for a conventional rock breakwater in navigable water, both often apply.
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Under 33 CFR Part 322, the Corps’ Section 10 rules cover structures or work in or affecting navigable waters unless an exemption or general permit applies. The regulation’s examples specifically include breakwaters, as well as bulkheads, revetments, riprap and jetties. Section 10 protects navigable waters from unauthorized obstruction or alteration.
Section 404 concerns the discharge of dredged or fill material into waters of the United States. Its rules expressly include property-protection structures such as riprap, groins, seawalls, breakwaters and revetments in the definition of fill material. The Corps’ current Section 404 regulation describes the permit requirement and its exemptions and general permits.
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“Navigable waters” for Section 10 purposes include waters subject to the ebb and flow of the tide and waters used, historically used, or susceptible to use for interstate or foreign commerce. The federal jurisdictional line is not always obvious at a wetland, shore feature, or water’s edge. Whether a site is covered by Section 404 also turns on the applicable definition of waters of the United States. Ask the responsible Corps district for a jurisdictional determination rather than deciding from a map or property boundary.
Not every dry-land project triggers either statute: Section 10 does not apply if the work is not in navigable waters, and Section 404 does not apply if no dredged or fill material is discharged into covered waters. Those are limits on federal jurisdiction, not permission for a property owner to declare a project exempt. State or local rules may apply even when federal jurisdiction does not.
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Does the right to protect your property mean you can build without a permit?
No. A landowner’s general right to protect property from erosion does not waive the permitting process. The Corps’ 2026 Nationwide Permit 13 acknowledges that right and says the district engineer can offer guidance on alternatives; it also states that permits remain part of the process.
The Corps encourages softer methods, such as bioengineering and vegetative stabilization, where they are likely to work under moderate-to-low erosive forces. Hard stabilization—including riprap, bulkheads and revetments—may be necessary where erosion forces are strong. That is a project-design consideration, not a permit exemption. A detached breakwater is not automatically the right solution: wave energy, fetch, nearshore depth, storm surge, sediment movement, tidal range, shoreline shape and the infrastructure at risk all matter to the design and review.
Can a nationwide permit cover a shoreline breakwater?
Sometimes, but a nationwide permit is a limited authorization—not a general right to start work. The project must meet the permit’s terms, any district-specific regional conditions, and applicable state requirements. A conventional detached breakwater may not fit either of the two nationwide permits most relevant to shoreline stabilization.
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Nationwide Permit 13: bank stabilization
The 2026 version of Nationwide Permit 13 authorizes certain bank-stabilization work for erosion control or prevention, including vegetation, bioengineering, sills, riprap, revetments, gabion baskets and bulkheads. It is framed around stabilization along a bank; it is not a blanket permit for an offshore breakwater.
- Generally, work may extend no more than 500 feet along the bank. A district engineer may waive that length limit with a written finding of no more than minimal adverse effects, but cannot waive a bulkhead length beyond 1,000 feet.
- Fill below the ordinary high water mark or high tide line is limited to an average of 1 cubic yard per running foot, unless the district engineer makes the required written minimal-effects finding.
- Only the amount of material needed for erosion protection may be used. The activity cannot channelize a stream, and vegetation or bioengineering must use native plants.
- Pre-construction notification is required before work in special aquatic sites, for work exceeding 500 feet, or when the fill-volume limit is exceeded.
The permit authorizes maintenance and repair of qualifying bank stabilization when that work requires authorization. Its inclusion of gabions or riprap does not make those materials a substitute for a permit, nor does it turn a detached rubble-mound project into bank stabilization.
Nationwide Permit 54: living shorelines
Nationwide Permit 54 may fit a living shoreline that incorporates a short sill or breakwater, but the living shoreline must have a substantial biological component. The permit covers qualifying projects in coastal waters, including the Great Lakes, along shores with small fetch and gentle slopes exposed to low-to-mid-energy waves. Its design concept combines native materials with vegetation or other living elements; the harder component might include a rock sill or reef.
- Structures and fill, including qualifying sills, breakwaters, reefs and beach materials, generally cannot extend more than 30 feet waterward from mean low water in tidal waters or from the ordinary high water mark in the Great Lakes. The district engineer may waive the limit in writing.
- The project generally cannot extend more than 500 feet along the bank, unless the district engineer waives that limit in writing.
- Pre-construction notification is required before construction. The 2026 compilation says the permit does not authorize beach nourishment or land reclamation.
- Materials such as coir logs, coir mats, stone, native oyster shell and native wood debris must be secured or installed so ordinary waves and currents do not move them. The 2026 text also addresses gravel and cobbles, pocket beaches, temporary access and dewatering.
The Corps’ 2026 permit cycle replaced the previous nationwide permits, which expired on March 14, 2026. The 2026 Nationwide Permit 54 was reissued effective March 15, 2026, and is reported to expire March 14, 2031. See the Corps’ 2026 nationwide-permit index and the permit-cycle discussion from Environmental Science Associates.
A conventional storm or navigation breakwater with little or no living-shoreline component is not made eligible for NWP 54 just because it is short. Likewise, NWP 13’s bank-stabilization limits do not make it a universal alternative. The Corps district must decide whether the design qualifies, and state certifications or regional conditions may prevent use of a nationwide permit in a particular place.
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What if neither nationwide permit fits?
If the activity is not exempt and no general permit authorizes it, the Corps’ rules generally require an individual Department of the Army permit. A Corps process briefing hosted by Pacific Ports identifies ENG Form 4345 for an individual or letter-of-permission application; general-permit projects use a pre-construction notification with a project narrative and drawings. A pre-application meeting is optional. The briefing also describes Corps coordination involving historic preservation, endangered species and essential fish habitat. Those consultations are part of agency review, not separate permits the owner purchases.
Applications can involve technical plans and environmental review, and the process depends on the district, project, and completeness of the application. The Honolulu District’s archival Source Book gives a non-controversial individual-permit estimate of 60 to 120 days after receipt of a complete application, but that is not a national promise and should not be used as a schedule for another district. See the Honolulu District Regulatory Source Book and the 2021 Corps process briefing.
What other approvals might be required?
Federal authorization is only one layer. A project may also need state water-quality certification, coastal-zone consistency concurrence, a state shore-structure or coastal-erosion permit, permission to use submerged lands, wetlands authorization, and local floodplain or building approvals. Which ones apply depends on location and design.
Section 401 water-quality certification
When a federal permit would authorize a discharge, expect the relevant state or authorized authority to address Section 401 certification. It may issue certification, waive it, or deny it; a denial can stop the federal permit. The details vary by state. For example, Ohio’s coastal guidance says certification is required for placement of dredged or fill material, including armor stone, in waters of the United States. A California process briefing describes certification as required for most Section 10 permits and all Section 404 permits there. Neither statement should be generalized to every state and every project.
Coastal-zone consistency
In a state with an approved coastal management program, a non-federal applicant for a federal license or permit may have to certify that the activity complies with the state’s program. The Corps’ general regulatory policies explain that, generally, the federal permit will not issue until the state concurs with the applicant’s consistency certification. This is distinct from any separate state construction permit. Do not treat a possible procedural presumption or elapsed time as permission to begin: confirm the state’s decision and provide the required documentation to the Corps.
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Ohio Lake Erie example
Ohio requires a Shore Structure Permit for a beach, groin, revetment, seawall, pier, breakwater, jetty, or other structure intended to control erosion, wave action or inundation along or near the Lake Erie shoreline, including islands, bays and inlets. The permit may be required even where a Corps permit or submerged-land lease is not. The Ohio Department of Natural Resources coastal guidance says to submit an application at least six months before the planned start. The application has no fee, but plans, specifications and design calculations must be prepared by an Ohio-registered professional engineer.
For a complete application with no review concerns and other required ODNR approvals in hand, the agency says a permit can be issued within 120 days. The permit is generally valid for two years; request a written extension before it expires if needed. An improvement extending lakeward of the natural shoreline may also need a submerged-lands lease, and local floodplain or building officials may require additional approvals. Ohio’s separate Coastal Erosion Area permit concerns permanent buildings or similar structures in mapped erosion areas; it is not the Shore Structure Permit.
Repair is not automatically exempt under Ohio rules. Whether repair or rehabilitation needs a Shore Structure Permit depends on the work, original construction date and earlier approvals. Contact ODNR before beginning. For a project already underway, ODNR instructs owners to stop work and contact the relevant authorities.
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In New York, a Coastal Erosion Management Permit is required for regulated work in a designated Coastal Erosion Hazard Area. The state’s permit program lists new construction, modification or restoration of breakwaters among permit-required activities in applicable nearshore and beach areas. An exception for certain small open-support docks and seasonal floats does not extend to breakwaters.
New York has 85 coastal communities under the program: 34 have DEC-certified local laws, while DEC administers the program in the other 51. In a certified community, start with the municipal building or zoning department; in a DEC-administered community, start with DEC. The state says DEC, the Corps, the Department of State and the Office of General Services may all be involved. A DEC permit does not convey property rights or eliminate the need for other approvals. New York also offers a Great Lakes Erosion Control General Permit for certain stabilization and structural repairs along Lake Erie, Lake Ontario, the Niagara River and the St. Lawrence River; projects beyond its limits may require an individual DEC permit.
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Does repairing an existing breakwater need a permit?
It can. A narrow Clean Water Act exemption covers maintenance, including emergency reconstruction of recently damaged parts, of currently serviceable structures such as breakwaters. But Section 10 is a separate statute, and state or local permit rules may still apply. The Section 404 maintenance provision is not a universal repair waiver.
For example, New York lists modification or restoration of breakwaters as permit-required in covered erosion hazard areas. Ohio says repair or rehabilitation may require a Shore Structure Permit depending on the circumstances and advises owners to ask first. Nationwide Permit 54 allows certain periodic repair of qualifying living-shoreline sills, breakwaters or reefs, with limits and possible regional conditions. Before removing, replacing or extending stone, confirm whether the proposed work is maintenance of the authorized design or a regulated alteration.
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A Corps reservoir can involve a separate shoreline-management regime. Under 36 CFR Part 327, private structures or activities in waters of Civil Works projects under Corps management generally require a Shoreline Use Permit, whether or not the waters are deemed navigable. Fixed structures and fill are also evaluated under Sections 10 and 404 where those statutes apply. A shoreline authorization does not eliminate state or local assent required by law.
What should you do before hiring a contractor?
- Pause any work already started. Do not assume ownership, emergency conditions or an erosion-protection purpose authorizes in-water construction. Ohio explicitly tells owners to cease work and contact authorities if construction has begun.
- Identify the water and shoreline. Is it tidal coast, the Great Lakes, a navigable river, a Corps-managed reservoir, or apparently dry upland? Ask the Corps district about jurisdiction instead of relying on a map screenshot.
- Contact the state coastal or water agency. Ask about shoreline construction, coastal erosion, submerged lands, wetlands and water-quality requirements. In Ohio, start with ODNR. In New York, check whether the community administers its own certified erosion law or whether DEC does.
- Ask local officials. Contact the floodplain administrator and building department; local approvals can be required in addition to federal and state permits.
- Have the proposed design reviewed against the right federal pathway. Ask the Corps whether an individual permit, nationwide permit, regional general permit or no federal authorization applies. Check state certification, coastal consistency and district regional conditions before relying on a general permit.
- Plan for complete drawings and review. Use appropriately qualified design professionals where required; Ohio specifically requires an Ohio-registered professional engineer for the cited submittals. Do not order stone, schedule in-water work or phase construction while approvals are pending.
There is no single nationwide permit form or processing schedule for every shoreline. The safe assumption is that the project needs review until the Corps and the relevant state and local authorities confirm otherwise. Neither an erosion-protection goal nor a contractor’s proposed dimensions answers the legal question.
Frequently Asked Questions
Can I ask the Corps whether my shoreline is federally regulated before designing the breakwater?
Yes. Ask the Corps district about a jurisdictional determination for the site and describe the proposed work, materials and location. A determination about federal waters does not decide whether state or local permits are required.
Can I build a breakwater first and apply for permits afterward?
Do not treat after-the-fact review as an acceptable construction plan. Unauthorized work in navigable waters can violate Section 10, and an agency may require corrective action; ask the relevant authorities before placing material.
Does owning the lakebed or having a contractor’s design eliminate permit requirements?
No. Property rights and engineering plans do not substitute for regulatory approvals. State submerged-land authorization may be a separate requirement where the project extends into publicly managed bottomlands.
Are permit rules the same in every U.S. state?
No. Federal statutes provide a baseline, but state coastal programs, water-quality decisions, submerged-land rules and local requirements differ. Ohio and New York are examples of additional layers, not a complete survey of state law.
