CHP officers early Monday arrested a woman suspected of driving drunk after she crashed off River Road, causing critical injuries to her passenger, according to the CHP.

Just after midnight, driver Haylee Sternberg, 23, was driving west on River Road, just west of Old Trenton Road, when she lost control of her minivan, CHP Sgt. Al Capurro said.

The vehicle ran off the roadway and overturned, ending up down an embankment. It landed passenger side down. The driver was able to escape the vehicle but the unconscious passenger had to be cut free by firefighters.

Forestville fire Capt. Patrick Mills said the van landed in a huge patch of poison oak. The crew used chainsaws to cut through the patch to get to the vehicle. They used stabilizing equipment to hold the van steady while cutting through the windshield to reach the injured woman.

The 25-year-old passenger and Sternberg were taken to Santa Rosa Memorial Hospital. The passenger’s injuries could be life-threatening, Capurro said. She was listed in critical condition Monday afternoon.

Sternberg was checked for injuries and then booked into the Sonoma County Jail on suspicion of two counts of felony drunken driving causing major injury. Her bail was set at $100,000.