SAN FRANCISCO (CBS SF) — Overhead Muni lines will be out of service this weekend on San Francisco’s Market Street due to a sewer cleaning and inspection project, officials said.

Sewers under Market Street between Third and Ninth streets will be cleaned, flushed and inspected between 2 a.m. Saturday and 4 a.m. on Sunday, according to the San Francisco Public Utilities Commission.

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Work could extend as far as one block in all directions from the affected intersections and some noise may be generated.

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Service vehicles could block some lanes of Market Street on a temporary basis during the project and minor traffic delays should be expected.

Muni’s overhead wires will be shut down during the operation, and the F Line trains and all electric coaches will be replaced with motor coaches until the work is completed.

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