Who is responsible for a damaged sewer main in a city easement?

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Speech-to-text from the recording, unchecked.

a member of the public Behind my house runs an eight inch sewer main in a five foot easement that the city recorded by ordinance.

a member of the public The line carries runoff from the city's own street drains.

a member of the public The city did easement work on it in 2019, and SFPUC inspected it in 2021.

a member of the public In June of this year, during permitted retaining wall project, the sewer main was damaged.

a member of the public SFPUC has declined to repair or even inspect it, and now says it's private and my liability despite the evidence to the contrary.

a member of the public DBI staff has told me that I am at least the third homeowner that they're aware of in this situation.

a member of the public On July 1, approximately thirty days after I had notified SFPUC of the situation, SFPUC changed the main owner the sewer main's owner and its own data from SFPUC owned to unknown.