Summer on Eastern Washington’s waterways is one of the best things about living in this part of the state. The Spokane River winds right through the city. Lake Coeur d’Alene is forty minutes east. Twin Lakes, Lake Roosevelt, Priest Lake, and dozens of other destinations draw thousands of boaters every weekend from Memorial Day through Labor Day. But with that volume of recreational boating comes a serious and preventable danger: boating under the influence, or BUI.

BUI is not a minor issue or a victimless offense. Nationally, alcohol is the single leading contributing factor in fatal recreational boating accidents. In Washington State, alcohol is involved in approximately 17% of all boating fatalities.

On a busy Fourth of July weekend on Lake Coeur d’Alene or the Spokane River, that statistic stops being abstract and starts being someone’s spouse, parent, or child.

If you were injured by a drunk or impaired boat operator on any Washington or Northern Idaho waterway, Gilbert Law Firm is ready to fight for you. We’ll break down exactly what Washington law says, what the penalties are for BUI offenders, and most importantly, what your rights are as the person who was hurt.

What Is BUI Under Washington State Law?

Boating under the influence (BUI) in Washington State is governed by RCW 79A.60.040, a statute separate from the DUI law that governs road vehicles but built on the same legal foundation.

Under Washington law, it is unlawful to operate any vessel, a motorboat, sailboat, jet ski, personal watercraft, or any other watercraft, while:

Under the influence of intoxicating liquor, marijuana, or any drug that appreciably lessens your ability to operate the vessel safely, OR
Having a blood alcohol concentration (BAC) of 0.08% or higher, OR
Having 5 nanograms or more of THC per milliliter of blood (Washington’s legal limit for marijuana impairment)

These limits apply within two hours of operating the vessel, just as Washington’s DUI law applies within two hours of driving a car. Importantly, a BUI conviction does not require a breath or blood test result. If law enforcement officers observe clear signs of impairment, slurred speech, impaired balance, poor coordination, the smell of alcohol, that evidence alone can support a BUI charge based on appreciable impairment, even without a chemical test result.

The “Triple Threat” of Alcohol on the Water

Many people are surprised to learn that alcohol affects you more quickly and more severely on the water than on land. This is not a legal argument. It’s physiology, and it matters enormously when assessing what an impaired boater is truly capable of. Researchers and boating safety experts refer to what’s sometimes called the “triple threat” of on-water alcohol impairment:

Sun and heat. Prolonged exposure to sun and heat accelerates dehydration and fatigue, both of which intensify the impairing effects of alcohol.
Wind, noise, and vibration. The constant movement of a boat, combined with wind, engine noise, and wave motion, creates a sensory environment that tires the vestibular system — the inner-ear mechanism that controls balance. When alcohol is added, balance impairment becomes dramatically more pronounced.
Spray and motion. The physical demands of boating — bracing against waves, maintaining footing on a wet deck, reacting to other vessels — all require coordination that alcohol compromises faster on water than on land.

The result, according to the U.S. Coast Guard and boating safety researchers: a person at 0.08% BAC who might be “legally impaired” on land is functionally more dangerous on the water, with slower reaction times, worse balance, and reduced ability to judge distance and speed.

This is why BUI is responsible for more boating deaths than any other single factor — and why Washington State and Spokane County law enforcement take it seriously.

BUI Penalties in Washington State

The legal consequences for boating under the influence in Washington are serious. Here is how penalties escalate based on the circumstances of the offense:

Standard BUI (Gross Misdemeanor)

Most BUI offenses are classified as gross misdemeanors under Washington law. A gross misdemeanor BUI carries:

Up to 364 days in jail
Up to $5,000 in fines
Potential probation and mandatory alcohol or drug treatment

There is no automatic license suspension for a BUI conviction, unlike a DUI. However, the conviction goes on the offender’s criminal record.

BUI as a DUI “Prior Offense”

This is a critical point that many people miss: under RCW 46.61.5055, a BUI conviction is treated as a prior DUI offense if the person is later convicted of DUI on land. This means that someone with a BUI on their record who later gets a DUI faces the enhanced sentencing that would normally apply to a repeat DUI offender, including mandatory minimum jail time, ignition interlock requirements, and higher fines.

In other words, a BUI is not just a one-time penalty. It can follow an offender and amplify the consequences of any future impaired driving offense.

BUI Causing Serious Bodily Injury (Felony “Assault by Watercraft”)

When a BUI operator causes serious bodily injury to another person, the charge escalates dramatically. Washington calls this “assault by watercraft,” a Class B felony carrying:

Up to 10 years in prison
Up to $20,000 in fines

“Serious bodily injury” includes injuries involving a substantial risk of death, permanent disfigurement, or protracted loss or impairment of any bodily organ or system.

BUI Causing Death (Felony “Homicide by Watercraft”)

The most severe BUI charge in Washington is “homicide by watercraft,” a Class A felony triggered when a BUI operator’s negligence causes the death of another person. Class A felonies carry:

Up to life in prison
Up to $50,000 in fines

This is the same sentencing tier as vehicular homicide on land. Washington treats a drunk boater who kills someone with the same gravity as a drunk driver who kills someone, as it should.

Under-21 BUI

For boaters under 21 years old, the threshold is far lower. Any detectable level of alcohol can lead to a BUI charge for a minor operator. There is no 0.08% threshold, the standard is zero tolerance.

Who Enforces BUI Laws on Spokane and Eastern Washington Waterways?

BUI enforcement on Eastern Washington waterways is multi-layered and active, particularly around summer holidays.

Spokane County Marine Enforcement Unit patrols Spokane County’s lakes and waterways year-round, enforcing state laws, investigating water accidents, and educating the public. They are active participants in national BUI enforcement campaigns and can be reached at 509-477-7608.
Operation Dry Water is the national BUI enforcement campaign coordinated annually around the Fourth of July, historically one of the highest-risk weekends for impaired boating. The Spokane County Sheriff’s Office has participated in Operation Dry Water in recent years, increasing patrols on local lakes and rivers during the holiday weekend. Nationally, the 2024 Operation Dry Water weekend resulted in 584 BUI arrests across the country, with over 296,000 boaters contacted by law enforcement. The 2026 enforcement weekend is scheduled for July 3–5, 2026.
Washington State Parks Boating Program coordinates statewide safety education and enforcement resources.
U.S. Coast Guard has concurrent jurisdiction over navigable waters in Washington State. If you are on open, navigable water, including the Spokane River and Lake Coeur d’Alene, both state and federal laws apply. The Coast Guard can stop, board, and inspect any vessel and can make BUI arrests under federal law as well as refer cases to state prosecutors.
Idaho law enforcement has jurisdiction on Idaho waters, including Lake Coeur d’Alene and the St. Joe River. Idaho has its own BUI laws, and Kootenai County Sheriff’s deputies are active marine patrol officers on Lake Coeur d’Alene throughout the summer.

The bottom line: if you are on Eastern Washington’s or Northern Idaho’s waterways, law enforcement is watching, especially on summer weekends.

The Difference Between BUI Criminal Charges and Your Civil Injury Claim

This is one of the most important things to understand if you were injured by a drunk boat operator: the criminal case and your personal injury claim are two completely separate legal processes.

When law enforcement charges a BUI offender, they are pursuing a criminal case on behalf of the State of Washington. The goal is punishment, fines, jail time, and a criminal record.

When you file a personal injury claim, you are pursuing civil compensation on your own behalf. The goal is full recovery of your losses, medical bills, lost income, pain and suffering, and everything else the accident cost you.

You do not need a criminal conviction to win a civil claim. The standards are different:

Criminal prosecution requires proof beyond a reasonable doubt
A civil personal injury claim requires proof by a preponderance of the evidence (essentially, that it’s more likely than not that the other party was negligent and caused your injuries)

This means that even if the BUI offender is never criminally charged, or is charged but acquitted, you can still pursue and win a civil claim against them. And conversely, a criminal BUI conviction or guilty plea creates powerful evidence in your civil case, a conviction is a finding that the operator was impaired, which is precisely the negligence you need to establish liability.

What a BUI Conviction Means for Your Injury Case

If the boat operator who injured you was arrested for, charged with, or convicted of BUI, that matters enormously to your civil case:

It establishes negligence. A positive chemical test for BUI, or a BUI conviction, is strong evidence that the operator was breaching their legal duty of care at the time of your accident. Washington courts and juries understand that impaired operation of a vessel is inherently unreasonable — it is the kind of conduct that makes liability clear.
It may support enhanced damages. While Washington does not have a standalone “punitive damages” framework for most civil cases, the degree of a defendant’s fault — including the recklessness of operating a boat while intoxicated — directly affects the jury’s assessment of non-economic damages like pain and suffering. A drunk boater is not just negligent — they are reckless. That recklessness has value in your claim.
It accelerates settlement. Insurance carriers know that a BUI arrest or conviction makes defending a civil claim extremely difficult. Our experience is that impaired boating cases with clear evidence of intoxication tend to resolve at significantly higher values than similar-severity accidents without impairment.
Express your concerns to law enforcement at the scene. If you suspect the boat operator was impaired when they injured you, tell the responding officer immediately. A positive chemical test administered at the scene is far more legally valuable than a BAC test done hours later. Your attorney at Gilbert Law Firm will also preserve all available evidence — including police reports, witness statements, and any dashcam or marine patrol footage.

The Specific Risk on Eastern Washington Waterways

BUI is not a problem that happens somewhere else. It happens here on the same waterways where Spokane families spend their summers.

The Spokane River: Runs through the heart of the city and draws thousands of kayakers, tubers, and motorized watercraft every summer weekend. The river’s current, rocks, and varying water levels make sober operation challenging. An impaired operator on the Spokane River is an acute danger to themselves and everyone else on the water.
Lake Coeur d’Alene: Just 40 minutes east of Spokane in Northern Idaho, is one of the most popular recreational boating destinations in the Pacific Northwest. It is also one of the most hazardous during summer holidays. The combination of heavy boat traffic, wake-sensitive conditions near marinas, and widespread holiday drinking creates a dangerous environment. A tragic example: a fatal boat collision on Lake Coeur d’Alene involving a wake boat operator killed three people and resulted in a $600,000 civil judgment.
Lake Roosevelt / Franklin D. Roosevelt Lake: formed by Grand Coulee Dam, sees significant recreational traffic throughout summer. Its remote stretches can mean delayed emergency response, making impaired boating accidents more likely to be fatal.
Twin Lakes, Banks Lake, Moses Lake, Priest Lake, Hayden Lake: Every waterway in the Eastern Washington and Northern Idaho region sees recreational traffic, and every waterway carries the same BUI risk.

The Spokane County Marine Enforcement Unit actively patrols these waterways and participates in state and national enforcement campaigns. But they cannot be everywhere at once. Impaired boaters still get on the water, and people still get hurt.

What to Do If You Were Injured by a Drunk Boat Operator near Spokane

If a BUI boater injured you or killed a family member, the steps you take in the immediate aftermath can determine the strength of your legal claim.

Get to safety and call 911 immediately. Request law enforcement (not just fire and rescue). You want law enforcement on scene to observe the operator’s condition, administer field sobriety tests, and potentially request a chemical test while BAC is still elevated.
Tell law enforcement you believe the operator was impaired. Say it explicitly. Officers respond to what they’re told to look for. If you smelled alcohol, noticed the operator was slurring or staggering, or observed them drinking before or during the trip, tell the responding deputy or officer. Your statement can initiate a BUI investigation.
Seek medical care immediately — even if you feel okay. Drowning near-misses, head injuries from impact, soft tissue damage, and shock can all mask serious injury in the immediate aftermath of a boating accident. An ER evaluation protects your health and creates medical documentation critical to your claim.
Document everything you can. Photos of vessel damage, your injuries, the water conditions, and any visible evidence of alcohol (open containers, beer cans). Get names and contact information for every witness on the water.
File a Washington Boat Accident Report. Washington State law requires a boat accident report to be filed when there is an injury requiring medical care beyond first aid, a death, a disappearance, or property damage over $2,000. Reports involving injury or death must be filed within 48 hours. Reports for other accidents must be filed within 10 days. Contact the law enforcement agency with jurisdiction over where the accident occurred, or reach the Spokane County Marine Enforcement Unit at 509-477-7608.
Do not give a recorded statement to the other boat owner’s insurance company. Not without speaking to an attorney first. Insurance adjusters are trained to use your words to minimize your claim, including suggesting you were partially at fault, that your injuries are not as serious as claimed, or that you delayed treatment.
Contact Gilbert Law Firm. The sooner we are involved, the more evidence we can preserve and the stronger your case will be. Call us at 509-321-0750. Your consultation is free and completely confidential.

What You Can Recover When a Drunk Boater Injures You

Washington law allows BUI accident victims to pursue full compensation for every way the accident has affected their lives. A strong civil claim in a BUI boating accident case can recover:

Medical expenses: Emergency treatment, hospitalization, surgery, imaging, physical therapy, follow-up specialist care, prescription medications, and future medical costs if your injuries require ongoing treatment.
Lost wages: Income you lost while recovering from your injuries.
Lost earning capacity: If your injuries are serious enough to prevent you from returning to your previous occupation or working at the same level, you can recover the projected difference in lifetime earnings.
Pain and suffering: Physical pain, emotional distress, anxiety, PTSD, and the lasting psychological impact of surviving a traumatic boating accident.
Loss of enjoyment of life: Compensation for activities and experiences you can no longer participate in — boating, sports, travel, and time with family.
Loss of consortium: If your injuries have affected your relationship with your spouse or family, your spouse may have an independent claim for loss of companionship and support.
Wrongful death damages: If a BUI boater killed your family member, you can pursue a wrongful death claim covering funeral and burial expenses, medical bills before death, loss of the financial support your loved one provided, and the loss of their companionship, guidance, and parental care.

Gilbert Law Firm: Spokane’s Boating Accident Attorneys

Gilbert Law Firm is a Spokane-based personal injury firm that has been fighting for Eastern Washington injury victims for decades. We know these waterways. We know Washington’s boating laws. And we know how insurance companies think — because our attorneys have experience on both sides of these cases.

If a drunk or impaired boat operator injured you or someone you love on the Spokane River, Lake Coeur d’Alene, Lake Roosevelt, Twin Lakes, or any Eastern Washington waterway, we want to hear from you.

Call 509-321-0750 — 24 hours a day, 7 days a week. Your consultation is free, confidential, and carries no obligation.

Gilbert Law Firm serves boating accident victims throughout Spokane, Spokane Valley, Spokane County, Cheney, Liberty Lake, Airway Heights, and all of Eastern Washington, as well as Northern Idaho, including Coeur d’Alene, Post Falls, and Kootenai County.

Frequently Asked Questions About BUI Injury Claims in Washington

1. Can I sue the boat operator’s insurance company?

Yes. Most boat owners carry watercraft or recreational marine insurance that covers liability for accidents caused by their negligence. We identify all available insurance coverage and pursue the maximum possible recovery under every applicable policy.

2. What if the boat operator’s insurance isn’t enough to cover my losses?

We explore all avenues of recovery, including the boat owner (if different from the operator), any marina or rental company involved, and other liable parties. We also pursue your own underinsured coverage if applicable.

3. How long do I have to file a claim?

Washington’s statute of limitations for personal injury is three years from the date of the accident under RCW 4.16.080. However, federal maritime law may impose shorter deadlines for accidents on navigable waters. Do not wait — contact us as soon as possible to protect your rights.

4. Does the boat operator have to be convicted of BUI for me to win my civil case?

No. The civil and criminal processes are separate. You can win a personal injury case even if the BUI charges are reduced or dismissed, as long as we can establish by a preponderance of the evidence that the operator was impaired and negligent.

5. What if my accident happened on Lake Coeur d’Alene in Idaho?

Gilbert Law Firm handles cases on both sides of the border. We can pursue claims under Idaho law for accidents on Lake Coeur d’Alene, the St. Joe River, and other Northern Idaho waterways.

6. What does it cost to hire a boating accident attorney?

Nothing upfront.

Boating Under the Influence in Washington State: Laws, Penalties, and Your Rights as a Victim