2026 Washington Bridge and Ferry Terminal Permit Changes

What Changed in Washington’s Bridge and Ferry Terminal Permit

Washington’s Bridge and Ferry Terminal Washing Permit was reissued July 17, 2026 as the Bridge and Ferry Terminal Maintenance Permit. The new permit adds stricter protections for marine waters, groundwater requirements near drinking water sources, and coverage for hydro-demolition, changing what agencies need to account for before maintenance work begins.

For agencies managing Washington’s bridges and ferry terminals, those changes can affect more than permit paperwork. A missed requirement can complicate washwater treatment, delay discharge, or push repainting and deck repair into a narrower maintenance window. Washington Stormwater has treated washwater on WSDOT bridge projects under the prior permit, giving its team direct experience with the treatment challenges these projects create.

Key Takeaways

• The Bridge and Ferry Terminal Washing Permit was renamed the Bridge and Ferry Terminal Maintenance Permit on July 17, 2026, and now runs through July 16, 2031, replacing the version issued in 2022.
• The reissue closes a gap that used to protect only freshwater. Discharges of copper, lead, or zinc into marine waters already listed as impaired for those metals are now prohibited outright, not just in rivers and lakes.
• Hydro-demolition, the high-pressure water jet method contractors increasingly use to strip concrete from bridge decks, is authorized under the permit for the first time.
• Sites near a Wellhead Protection Area now face an added groundwater standard, plus a new requirement to submit SEPA documentation or formally attest to an exemption.
• About 10 entities hold statewide coverage, but WSDOT alone maintains more than 500 sites under it, so one overlooked provision in the reissue can touch a large share of the state’s bridge and ferry terminal inventory.

What the Bridge and Ferry Terminal Washing Permit Covers

Who Needs Coverage

The permit is an NPDES and State Waste Discharge general permit covering bridge and ferry terminal maintenance activities. Coverage commonly applies to state and local government agencies and municipalities, and the permit can also apply to contractors working on their behalf. 

Washington State Department of Ecology reports that roughly 10 entities hold coverage statewide, with WSDOT alone responsible for more than 500 covered sites. Local governments that own fracture critical bridges or terminal facilities also enroll, since the same discharge rules apply regardless of which agency owns the structure.

The Washing and Maintenance Activities It Regulates

Coverage spans a range of activities rather than a single task. Spot cleaning ahead of routine inspections, periodic washing on multi-year cycles to remove buildup, and heavier preparatory washing before repainting all fall under the same permit. Hydro-demolition now joins the list under the reissue. Each activity produces washwater carrying different contaminant loads, which is why the permit ties specific best management practices to each phase rather than applying one blanket standard. 

Contractors brought in to manage that washwater need to know which phase they are supporting, what the structure is coated with, and how the project schedule lines up with seasonal discharge conditions before they can size a treatment approach that will actually hold up to a compliance review.

What Changed Under the 2026 Reissue

Marine Waters No Longer Get a Pass on Metals

Under the outgoing permit, the prohibition on discharging to waters already impaired for copper, lead, or zinc applied mainly to freshwater. According to Ecology’s December 2025 announcement, the reissued permit extends that same protection to marine waters, closing a gap that mattered for nearly every ferry terminal project in the state, since terminals sit in Puget Sound and other marine receiving waters rather than rivers. 

Coating removal and structural cleaning routinely release these three metals, so a ferry terminal project that previously assumed marine discharge was acceptable now needs a treatment plan built around the tighter standard.

Groundwater Protection and New Paperwork

Sites within a Wellhead Protection Area, the mapped zone around a public drinking water well, now face a groundwater standard that did not exist under the prior permit terms. A bridge or ferry terminal project that discharges to ground rather than surface water inside one of these zones has to demonstrate it will not push contaminants toward a drinking water source. 

Agencies must also submit State Environmental Policy Act documentation with their coverage application, or formally attest that their project qualifies for an exemption. Neither step is difficult on its own, but skipping it delays coverage at exactly the point in a project when schedules are least forgiving, since Ecology can hold an incomplete application rather than process it on the original timeline.

Hydro-Demolition Is Now an Authorized Activity

Hydro-demolition, which uses a high-pressure water jet to remove deteriorated concrete instead of jackhammers or mechanical scarifiers, is faster, generates less airborne dust, and is safer for crews working over water or traffic. Before the 2026 reissue, agencies adopting the method had no defined discharge pathway under this permit, which left project teams guessing at what compliance would even look like. 

Ecology’s update formally brings discharges from this method into the permit’s scope for the first time. This gives agencies a documented compliance path and gives contractors clear requirements to design a treatment system around before mobilizing equipment to a live bridge deck.

Staying Compliant During an Active Maintenance Window

Why Timing Still Drives Compliance

Washing and maintenance activities remain tied to conditions in the receiving waterway. This means agencies still have to plan around when discharge is actually permitted rather than when a crew and a bridge closure happen to line up. Traffic control, public notice, and inspection windows are usually locked in months ahead. 

Meanwhile, the discharge conditions that make washwater dischargeable in the first place can shift week to week with weather. A schedule built around the old permit assumptions may no longer line up with the available compliance window. That risk is higher during a reissue year, when new paperwork requirements can add steps to the project timeline. Agencies that wait until mobilization to check the current permit terms often find out too late that a step in the process now takes longer than it used to.

On-Site Treatment Can Reduce Scheduling Constraints

Washington Stormwater built a trailer-mounted treatment system for WSDOT specifically to get around that dependency on natural conditions. The unit treats water at 50 to 75 gallons per minute and holds 1,000 gallons of onboard storage for fluctuating volumes during active milling. It also continuously monitors pH, turbidity, and total dissolved solids so it can respond in real time to concrete slurry and debris. Mounted on a 12,000 pound car trailer, it mobilizes to a bridge site without specialized transport or heavy equipment.

Kelly Brauhn, WSDOT Bridge Supervisor, has credited the system with solving a problem the agency had struggled to manage on its own: a low-cost, easy-to-maintain mobile unit that needs only a couple hundred gallons of water to start up, with a computer system that tracks chemical use and logs when water is released.

Choosing a Compliance Partner for Bridge and Ferry Terminal Work

What a Treatment Provider Should Bring to the Table

A provider working on a covered bridge or ferry terminal project should be able to speak to the permit terms directly, not just the equipment. That includes handling the permitting and environmental services side of a project, such as preparing coverage applications and the documentation Ecology now requires, alongside the treatment work itself. 

Agencies juggling inspection schedules, traffic control, and public safety obligations rarely have the bandwidth to also track a permit reissue’s fine print. Coordinating the paperwork and treatment plan through the same provider can reduce that burden, keeping both sides of the project aligned with current permit requirements.

Ports and Marine Terminals Carry the Same Metals Exposure

Ports and marine terminals may face similar metals concerns during washdown, dewatering, or maintenance activities, but their discharge requirements depend on the specific permits and authorizations that apply to the facility. 

Operators should evaluate the receiving water, pollutants involved, and applicable permit conditions before selecting a treatment or discharge approach. Ports often coordinate with multiple agencies, including the Army Corps and local shoreline authorities. Working with a provider that tracks Ecology’s marine discharge requirements across programs can help keep treatment and permitting decisions aligned with the requirements that apply to each project.

Final Thoughts

An agency that treats this reissue as a formality could run into problems mid-project. A washwater plan may no longer meet the marine metals standard, or a coverage application could be missing the new SEPA documentation. Either issue can delay a bridge closure that has already been scheduled around traffic and public access.

Washington Stormwater has built treatment equipment for WSDOT bridge work and provides permitting and environmental services alongside water treatment support. If your agency has a bridge or ferry terminal project coming up, get the compliance plan in place before the closure date is locked in.

Frequently Asked Questions