A Stratford woman has been charged with impaired driving after she struck a bridge in St. Marys.

OPP say around 7:30 Saturday night, a woman failed to negotiate the bridge entrance while travelling northbound on Water Street.

That's when she struck the guardrail.

The woman was not hurt.

She failed two roadside breath tests and was given a 90 driver's license suspension and had her car impounded for seven days.

The 32 year-old woman will appear in court on July 25.