Work to replace two water pipelines along a one-mile section of South Coast Highway is scheduled to begin in October, according to the South Coast Water District.
Water district spokesman Mike Dunbar said the construction, which could continue until January, is expected to close down one northbound lane of the highway, from 11th Avenue in Laguna Beach to Via Mentone in Dana Point.
Pipeline construction hours will be limited to 9 a.m. to 3 p.m., Monday through Friday, Dunbar said.
One of the pipes being replaced is a 24-inch pipeline, one of the district's main supply routes that provides water to homes and businesses in South Laguna and Dana Point.
Two weeks before construction starts, the water district plans to put up a sign to remind motorists of the upcoming work.