A Superior Court jury found a 47-year-old Renton man guilty of homicide by watercraft Tuesday in the death of a Seattle school teacher in July 2014 on Lake Washington.

Richard Anthony Hicks faces a prison term of 51 to 68 months when he’s sentenced on Sept. 4, the standard range when someone is under the influence of drugs or alcohol, according to Dan Donohoe, the spokesman for the King County Prosecuting Attorney’s Office.

Hicks was also convicted of two counts of assault by watercraft.

“The defendant was under the influence of alcohol when the motorboat he was piloting collided with a sailboat,” said Donohoe.

A passenger on the sailboat, Melissa Protz, 33, died in the collision and two other passengers on the sailboat were injured.

Protz taught sixth- and seventh-grade biology at Assumption-St. Bridget School in Seattle.

The seven passengers aboard a sailboat going 1 or 2 knots on a windless Lake Washington yelled and waved their arms as the 25-foot powerboat Hicks was piloting bore down on them, according to charging documents.

Hicks didn’t hear the yelling or see the sailboat until he was too close to avoid a collision at about 10:30 p.m. July 16, according to prosecutors.

The sentencing is set for 1:30 p.m. before Judge Carol Schapira in courtroom W-331 of the King County Courthouse.

The case was handled by Senior Deputy Prosecutor Amy Freedheim and Deputy Prosecutor Brandy Gevers.