The leaking sewer line behind the massive sinkhole on 15 Mile in Fraser is a county-owned main, an official said Friday.

“It is our line,” said Tom Stockel, construction engineer for the Macomb County Public Works Office. “It’s not the city of Detroit’s, it’s not Oakland County’s.”

The 100-foot-wide, 250-foot-long sinkhole that appeared last Saturday was caused by the collapse of the leaking Macomb Interceptor Drain sewer that runs under 15 Mile, the border between Clinton Township and Fraser.

On Sunday, incoming Macomb County Public Works Commissioner and former congresswoman Candice Miller plans to provide an update on efforts to repair the sinkhole. She will be joined by Macomb County Executive Mark Hackel and Fraser Mayor Joe Nichols.