A Napa man was killed Saturday afternoon when his Porsche went out of control on a rain-slicked curve on Highway 121 in Sonoma Valley and was broadsided by an oncoming car, the CHP said.

Mark Steven Heinemann, 50, was declared dead at the scene.

A passenger in his car and the driver of the other vehicle, a 2002 Chrysler PT Cruiser, were transported to local hospitals with minor injuries, Officer John Bigelow said.

Heinemann was southbound on Highway 121 just south of Viansa Winery about 2:30 p.m. when he lost control and crossed into the northbound lane directly in front of the oncoming car, Bigelow said.

Heinemann's Porsche turned sideways as he attempted to regain control and the PT Cruiser struck the driver's side of the Porsche.

No citations were issued, but Bigelow said that Heinemann was at fault for going too fast for the rainy conditions.

— Guy Kovner

Who to contact

Nexius Solutions (Verizon installer)

Brett Windham



City of Santa Rosa

Eric McHenry

Chief Information Officer