A massive plume of smoke over southeast Santa Rosa late Wednesday afternoon was part of a firing operation to slow the spread of a fire threatening Bennett Valley, said Bennett Valley Battalion Chief Darren DeCarli.

The operation was done above Annadel Heights. Firefighters have been working in the area all day attempting to get a solid containment line on that section of fire.

The plume of smoke rose over southeast Santa Rosa just before 5 p.m.

A large area of Trione-Annadel State Park’s 5,000 acres already has burned from the Nun fire since Sunday.

Sizing up public transit fares

Santa Rosa to San Rafael $9.50 adult for one way on the SMART train; $8 one way on Golden Gate Transit Bus.

Sonoma County Transit one-way $3.90 for the 40-mile plus trip between Cloverdale and Rohnert Park/Petaluma.

Santa Rosa City Bus, Petaluma Transit and Marin Transit have one-way adult fares of $1.50 and $2 within their service areas.

Altamont Commuter Express $13.75 for 75-mile trip between Stockton and San Jose. From Livermore to San Jose, approximately 40 miles, the fare is $9.

Caltrain’s adult cash fare for the 41-mile trip from San Francisco to Sunnyvale is $7.75.

Capitol Corridor’s adult fare for the 66 miles from Oakland to Davis is $27. The 45-mile trip between Suisun City and Sacramento is $16. The 15-mile trip between Davis and Sacramento is $9.

SOURCE: SMART staff research