Caltrans on Friday plans to start repaving a four-mile stretch of Highway 128 in the Boonville area, and it expects some traffic delays.

The $1.5 million construction project will be 6 a.m. to 6 p.m. Monday through Friday and is expected to last until the end of August.

The work will be done from Con Creek to Robinson Creek, and traffic delays of up to 10 minutes are possible.

Caltrans spokesman Phil Frisbie Jr. said the work is “normal preventive maintenance.” A few spots in the road are “experiencing minor failure” and will require grinding work before the paving, he said.

The project is in addition to pavement repairs being done on a 10-mile stretch of Highway 128 to the west — from nine-tenths of a mile west of Big Oaks Drive to nine-tenths of a mile east of the Mendocino-Sonoma County line.

In Lake County, Caltrans on Monday will resume work on Highway 53 in Clearlake. Frisbie said the initial contractor ran into financial problems and couldn’t finish the work.

The job includes installing a traffic signal at Olympic Drive, widening shoulders, adding and lengthening turn lanes and repaving about four miles of Highway 53 from about 40th Avenue to almost Highway 20. The project is expected to be finished in fall 2013.

Crews will be working 6:30 a.m. to 5 p.m. Monday through Friday, with one-way traffic controls at times and traffic delays of up to 10 minutes.

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