KLAMATH FALLS, Ore. -- Klamath County authorities have charged a Klamath Falls woman with two counts of manslaughter, DUII and assault after a crash Thrusday evening that killed a California couple and critically injured their 6-year-old great-grandson.

Oregon State Police detectives arrested Carrie Ames, 22, after she was discharged from a Klamath Falls hospital on charges related to a Thursday night double fatal traffic crash in Klamath Falls.

OSP detectives John Mogle and Chris Kaber arrested Ames on two counts of Manslaughter in the First Degree, DUII, Assault in the Second Degree, and Assault in the Third Degree. She was lodged in the Klamath County Jail pending a circuit court arraignment.

DA Ed Caleb's office charged Ames with manslaughter for the vehicular homicides of Billy Don Barton, 66, and his wife, Donna Barton, 66, both from Dorris, Calif.

In addition, charges of DUII and Assault in the Second Degree were filed, for injuries to Daba Phillips, 6, a passenger in the Bartons' car, and Assault in the Third Degree for injuries to Jackie Mankins, 18, a passenger in Ames' vehicle.

Troopers and detectives are continuing the investigation into a Klamath Falls-area Thursday evening fatal traffic crash

This crash is a reminder of why police officers in Oregon and around the country are stepping up enforcement efforts this holiday weekend to prevent crashes and remove impaired drivers from the road.

According to OSP Lt. Jason Westfall, shortly after 7 p.m., a 2009 Toyota Corolla driven by Carrie Ames was eastbound on the Southside Bypass near Washburn Way when it veered across the center line and collided head-on with a westbound 2000 Dodge Stratus driven by Barton.

Barton and his wife, Donna, were pronounced dead at the scene. Their 6-year old great-grandson, Daba Phillips, also from Dorris, was critically injured.

The victims were using safety restraints and the car's airbags deployed. Daba was in a child booster seat in the right rear seating location. He was transported by air ambulance to Doernbecher Children's Hospital in Portland.

Ames and passenger Jackie Mankins,18, from Klamath Falls, were transported by ground ambulance to Sky Lakes Medical Center with minor injuries. Both were using safety restraints and the car's airbags deployed.

OSP patrol troopers and Criminal Investigations Division detectives from Klamath Falls and Central Point area command offices are continuing the investigation with the assistance of the Klamath County District Attorney's Office.

Klamath County Sheriff's Office, Klamath Falls Police Department, Klamath County Fire District 1, and ODOT assisted at the scene. California Highway Patrol assisted OSP with next of kin notification.

Police officers in Oregon and around the country started stepping up impaired driving enforcement efforts Aug. 20, and are keeping the pressure on through the holiday weekend, Sept. 3-6.

Coinciding with efforts to remove impaired drivers off the road is a statewide effort running August 30 through September 12 monitoring safety belt usage, with an emphasis on child passengers.