The site of the Oso mudslide, as it appeared in May 2014, two months after the event.

The site of the Oso mudslide, as it appeared in May 2014, two months after the event.

Another delay in the civil trial for the deadly Oso mudslide

OSO — A civil trial to explore whether anyone should be held responsible for the deadly Oso mudslide has again been delayed, this time so experts can adequately digest the results of drilling and other recent research aimed at finding hard evidence that may explain why the hill fell.

The trial originally was set for fall 2015, but was rescheduled for June to allow more time for the parties to prepare.

Now, there will be no mudslide trial before mid-to-late September.

King County Superior Court Judge Roger Rogoff changed the schedule in a Feb. 18 ruling that came after lawyers for Snohomish County, the state of Washington, and a timber company all said more time is necessary.

The delay was opposed by lawyers representing the families of the 43 people who were killed and dozens of others who were injured in March 2014 when a wall of mud and trees raced across the Stillaguamish River valley.

“It cannot be underscored more deeply at this stage that Plaintiffs deserve their day in court,” the lawyers wrote. “The trauma of survivors and surviving family members endures while this case is prolonged and remains unresolved.”

Attorneys for the state and county asked for more time to consider the results of drilling that state experts conducted over the past year in an effort to better understand the geology of the hillside and how water moved through the ground.

The results still are being analyzed, but the work is raising questions about some widely held theories, including the suggestion that the primary reason the hill fell was because logging over the years sent more water percolating into the area that collapsed, according to court papers. Other independent scientific examinations of the slide paint a more complex picture, including signs that similar events repeatedly have occurred in that valley since Ice Age.

“The State’s drilling revealed important, previously unknown information, some of which still is being evaluated in laboratories across the West,” the county’s lawyers wrote. “Many of the geological, geotechnical, and hydrological experts have revised or are in the process of revising their opinions, including many of plaintiffs’ experts.”

Along with their pleadings, state attorneys filed a lengthy report that contains preliminary opinions from their experts, who note that studies of the hillside prior to the 2014 disaster largely were based on educated assumptions, not hard evidence.

“The analysis of what contributed to the Oso landslide, and just as importantly what factors did not contribute, is not surprisingly an incredibly complex analysis requiring a multidisciplinary team to fully evaluate the event,” wrote Rene Tomisser, senior counsel for the state attorney general’s office.

Judge Rogoff wrote that the schedule for bringing the case to trial always has been ambitious and the lawyers have been working hard.

“While this Court might quarrel with whether any litigation can provide ‘closure’ for folks who have tragically lost their families, their homes, and their bearings, the Court certainly understands Plaintiffs’ desire to have a trial that seeks to answer many of the questions they harbor as a result of this tragedy,” Rogoff wrote.

He said that delaying the trial is the correct decision now, but there will be no further continuances “absent the most extraordinary circumstances.”

Scott North: 425-339-3431; north@heraldnet.com. Twitter: @snorthnews.

Talk to us

> Give us your news tips.

> Send us a letter to the editor.

> More Herald contact information.

More in Local News

Students from Explorer Middle School gather Wednesday around a makeshift memorial for Emiliano “Emi” Munoz, who died Monday, May 5, after an electric bicycle accident in south Everett. (Aspen Anderson / The Herald)
Community and classmates mourn death of 13-year-old in bicycle accident

Emiliano “Emi” Munoz died from his injuries three days after colliding with a braided cable.

Snohomish County prosecutor Kara Van Slyck delivers closing statement during the trial of Christian Sayre at the Snohomish County Courthouse on Thursday, May 8, 2025 in Everett, Washington. (Olivia Vanni / The Herald)
Jury deliberations begin in the fourth trial of former Everett bar owner

Jury members deliberated for about 2 hours before Snohomish County Superior Court Judge Millie Judge sent them home until Monday.

Christian Sayre sits in the courtroom before the start of jury selection on Tuesday, April 29, 2025 in Everett, Washington. (Olivia Vanni / The Herald)
Christian Sayre timeline

FEBRUARY 2020 A woman reports a sexual assault by Sayre. Her sexual… Continue reading

Everett
Everett considers ordinance to require more apprentice labor

It would require apprentices to work 15% of the total labor hours for construction or renovation on most city projects over $1 million.

Danny Burgess, left, and Sandy Weakland, right, carefully pull out benthic organisms from sediment samples on Thursday, May 1, 2025 in Everett, Washington. (Olivia Vanni / The Herald)
‘Got Mud?’ Researchers monitor the health of the Puget Sound

For the next few weeks, the state’s marine monitoring team will collect sediment and organism samples across Puget Sound

Everett postal workers gather for a portrait to advertise the Stamp Out Hunger Food Drive on Wednesday, May 7, 2025 in Everett, Washington. (Olivia Vanni / The Herald)
Snohomish County letter carriers prepare for food drive this Saturday

The largest single-day food drive in the country comes at an uncertain time for federal food bank funding.

Craig Skotdal makes a speech after winning on Tuesday, April 22, 2025 in Tulalip, Washington. (Olivia Vanni / The Herald)
Craig Skotdal: Helping to breathe life into downtown Everett

Skotdal is the recipient of the John M. Fluke Sr. award from Economic Alliance Snohomish County

Paine Field Community Day returns Saturday, May 17

The youth-focused celebration will feature aircraft displays, talks with pilots and a variety of local food vendors.

FILE — Jet fuselages at Boeing’s fabrication site in Everett, Wash., Sept. 28, 2022. Some recently manufactured Boeing and Airbus jets have components made from titanium that was sold using fake documentation verifying the material’s authenticity, according to a supplier for the plane makers. (Jovelle Tamayo/The New York Times)
Boeing adding new space in Everett despite worker reduction

Boeing is expanding the amount of space it occupies in… Continue reading

Kyle Parker paddles his canoe along the Snohomish River next to Langus Riverfront Park on Thursday, May 8, 2025 in Everett, Washington. (Olivia Vanni / The Herald)
Tip to Tip: Kyle Parker begins his canoe journey across the country

The 24-year-old canoe fanatic started in Neah Bay and is making his way up the Skykomish River.

Carli Brockman lets her daughter Carli, 2, help push her ballot into the ballot drop box on the Snohomish County Campus on Tuesday, Nov. 5, 2024 in Everett, Washington. (Olivia Vanni / The Herald)
Here’s who filed for the primary election in Snohomish County

Positions with three or more candidates will go to voters Aug. 5 to determine final contenders for the Nov. 4 general election.

Kamiak High School is pictured Friday, July 8, 2022, in Mukilteo, Washington. (Ryan Berry / The Herald)
Mukilteo police respond to stabbing at Kamiak High School

One juvenile was taken into custody in connection with Friday’s incident. A victim was treated at a hospital with non-life-threatening injuries.

Support local journalism

If you value local news, make a gift now to support the trusted journalism you get in The Daily Herald. Donations processed in this system are not tax deductible.