A man accused of driving his car into a San Francisco Municipal Railway tunnel last month pleaded not guilty today to DUI charges, a district attorney’s office spokeswoman said.

scott.mitchell.jpgA man accused of driving his car into a San Francisco Municipal Railway tunnel last month pleaded not guilty today to DUI charges, a district attorney’s office spokeswoman said.

Scott Mitchell, 40, of Sebastopol, was arrested on Jan. 19 after allegedly entering the Muni tunnel near Church and Duboce streets that morning, according to police.

The incident shut down underground Muni service through much of the morning.

Mitchell appeared in court today to be arraigned on charges that include driving under the influence of alcohol, with a special allegation that his blood alcohol level was above 0.15, which is nearly twice the legal limit, district attorney’s office spokeswoman Stephanie Ong Stillman said.

Mitchell, who is out of custody, will next return to court on Feb. 23 for a pre-trial conference, Stillman said.

Dan McMenamin, Bay City News

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