Mark Mullan faces a sentencing range of 15 to 19 years in prison if he's convicted as charged.
Prosecutors said in court documents Thursday that Mullan's preliminary blood-alcohol level was 0.22 percent after Monday's crash. That's nearly three times Washington's legal limit for driving.
He remains jailed on $2.5 million bail, with arraignment scheduled for April 11. It's not known if he has a lawyer.
The crash killed Dennis and Judith Shulte, retired teachers from Kokomo, Ind., who recently moved to Seattle. Karina Schulte, 33, and her infant son were critically injured.
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