Navigation servitude is a federal legal doctrine that gives the government a dominant interest in every navigable waterway in the country, overriding the rights of anyone who owns land along or beneath that water. In plain terms: if you own waterfront property, the water itself, and everything you build in or over it, sits under federal authority. You need permits to build there, and if a federal project later destroys what you built, you usually get nothing in return.
What Counts as a Navigable Waterway
Federal authority attaches only to waters that qualify as “navigable in fact.” The test asks whether the water is used, or could be used, in its ordinary condition as a highway for commerce. A river does not need to carry cargo ships. If it has historically floated timber, carried fur traders in canoes, or allowed small craft to move goods between states, that history can establish navigability.1Environmental Protection Agency. Appendix D Legal Definition of Traditional Navigable Waters Even seasonal waterways can qualify if their high-water periods support commercial travel.
A separate test covers coastal and tidal waters. If a waterbody is subject to the ebb and flow of the tide, it falls under federal jurisdiction regardless of depth or current commercial use. The Army Corps of Engineers defines navigable waters as those subject to tidal action, those currently or historically used for interstate or foreign commerce, and those susceptible to such use.2U.S. Army Corps of Engineers. 33 CFR Part 329 – Definition of Navigable Waters of the United States
On the shore itself, the servitude reaches up to the ordinary high-water mark. That line is identified by looking at where the presence and action of water are common enough in ordinary years that the soil takes on a distinct character from the banks, with different vegetation and composition. Everything below that mark falls within the government’s dominant interest. Land above it, called “fast land,” keeps stronger property protections. Locating that line on your own property matters, because it separates two very different legal worlds.
What You Can and Cannot Do Below the High-Water Mark
Owning land along a navigable waterway does not give you authority over the water. Riparian owners have a right of access, but that right is subordinate to the federal navigation interest. If a shipping lane needs widening, your dock may need to be shortened. If a federal project requires a new channel, your pier can be removed entirely. The government does not need your permission.
Any construction in, over, or under navigable waters requires federal authorization. Section 10 of the Rivers and Harbors Act of 1899 prohibits building wharves, piers, jetties, breakwaters, bulkheads, or any other structure in navigable waters without plans recommended by the Chief of Engineers and authorized by the Secretary of the Army.3Office of the Law Revision Counsel. 33 USC 403 – Obstruction of Navigable Waters Generally The same prohibition covers dredging, filling, or altering the course or capacity of the waterway. Violating it is a federal misdemeanor carrying fines between $500 and $2,500, up to one year of imprisonment, or both. Courts can also order unauthorized structures removed by injunction.4Office of the Law Revision Counsel. 33 USC 406 – Penalty for Wrongful Construction of Bridges, Piers, and Other Structures
The 1899 fine amounts look mild, and Congress has never updated them for Section 10 specifically. The real enforcement teeth come from the injunction power. A federal court can order you to tear out a structure you spent hundreds of thousands of dollars building, at your own expense, with no reimbursement.
Permits You Need Before You Build
Two federal permit programs commonly apply to waterfront work, and confusing them is a costly mistake.
Section 10 of the Rivers and Harbors Act governs structures and work in navigable waters as traditionally defined. It covers piers, boat docks, bridges, bulkheads, jetties, dredging, pile driving, and utility crossings. Its jurisdiction reaches waters subject to tidal action, waters historically used for interstate commerce, and waters crossing state or international borders.5eCFR. 33 CFR 320.2 – Authorities to Issue Permits
Section 404 of the Clean Water Act governs the discharge of dredged or fill material into “waters of the United States,” a category that reaches beyond traditional navigable waters. Every Section 10 water also falls under Section 404, but Section 404 can pick up streams, ponds, and wetlands that Section 10 would never touch.
The Supreme Court narrowed Section 404’s reach in Sackett v. EPA (2023), holding that the Clean Water Act covers only “relatively permanent, standing or continuously flowing bodies of water” that are traditional navigable waters or have a continuous surface connection to them. For wetlands, the Court required that the wetland be practically indistinguishable from covered waters, rejecting the broader “significant nexus” test the EPA had previously applied.6Supreme Court of the United States. Sackett v. EPA, No. 21-454 The ruling removed federal permitting for many isolated wetlands and intermittent waterways. It did not touch Section 10 authority over traditionally navigable waters.
The Army Corps of Engineers processes both programs. Projects with minimal environmental impact may qualify for a general permit, including nationwide permits that pre-authorize routine categories of work. Larger or more impactful projects require an individual permit with case-by-case review.7U.S. Army Corps of Engineers – Mobile District. Permit Types Figure out early whether your project triggers one program, both, or neither. The penalties for guessing wrong go beyond fines.
Why You Usually Get No Compensation
Here is where navigation servitude departs sharply from ordinary property law. Under the Fifth Amendment, the government generally must pay fair market value when it takes private land for public use. When it exercises its navigation servitude, it owes nothing for the destruction of structures or property interests below the ordinary high-water mark.
The Supreme Court made this clear in United States v. Rands (1967), holding that “the proper exercise of [the government’s navigation] power is not compensable under the Fifth Amendment.” The Court reasoned that the government’s interest in navigable waterways predates any private claim, so it is reclaiming a dominant right rather than taking something the individual truly owned.8Justia U.S. Supreme Court. United States v. Rands, 389 U.S. 121 (1967)
The practical consequences are severe. If a federal project destroys your private dock, pier, or dam located below the high-water mark, you receive no reimbursement for that structure. If a harbor modernization project cuts off access to your waterfront commercial property, the loss is yours to absorb. The financial risk of building in or over navigable waters falls almost entirely on the private investor, and many waterfront buyers learn this too late.
When You Are Owed Compensation
The no-compensation rule has real limits. Understanding them can turn a total loss into a legitimate takings claim.
Fast Land Above the High-Water Mark
The servitude does not extend past the ordinary high-water mark. When the government physically invades or takes fast land, it must pay. Even here, Rands added a painful twist: the government could exclude from its compensation calculation any value the fast land derived from its proximity to navigable water. An upland parcel worth $500,000 largely because of direct water access could be appraised at a stripped-down figure that ignored that premium.8Justia U.S. Supreme Court. United States v. Rands, 389 U.S. 121 (1967)
Congress partially fixed this in Section 111 of the Rivers and Harbors Act of 1970. When the government takes fast land for a waterway improvement, compensation must reflect the property’s fair market value based on all reasonable uses, including the highest and best use, even if that use depends on water access. Section 111 does not, however, allow compensation for reduced access to remaining property after a partial taking.
Privately Improved Waterways
A second exception comes from Kaiser Aetna v. United States (1979). A developer had dredged a shallow, landlocked Hawaiian lagoon and connected it to the ocean, creating a marina. The government argued the improved waterway was now “navigable” and the public had a right of access. The Court disagreed. The government could not force public access onto a privately improved waterway without invoking eminent domain and paying just compensation.9Legal Information Institute. Kaiser Aetna v. United States, 444 U.S. 164 (1979)
The Court leaned on several facts: the waterway was private property under state law, it was not naturally navigable before the improvements, the owner had invested substantial capital with a reasonable expectation of private control, and the right to exclude others is a fundamental element of property rights. Forcing public access would amount to an “actual physical invasion” requiring compensation. This exception matters most for owners who have created or substantially improved a waterbody that was not navigable in its natural state.
State Rules Apply on Top
Federal permits are not the whole picture. States operate a parallel version of navigation servitude, usually grounded in the public trust doctrine, and often assert ownership over the beds of navigable waters within their borders. State and local authorities use that authority to regulate fishing, swimming, shellfish harvesting, and recreational access. Some states define navigability more broadly than the federal standard, extending public rights to waters that would not qualify as navigable under federal law. Others impose separate permitting requirements for structures in state-regulated waterways.
A project that clears Section 10 review with the Army Corps of Engineers may still need separate state authorization, and state agencies may apply different environmental standards. Check both layers before you break ground.