In an unprecedented move, Los Angeles County will pay $4 billion as part of a tentative agreement to settle more than 6,800 claims of child sexual abuse that allegedly occurred inside the county’s sprawling network of juvenile facilities and foster homes.

The tentative settlement between the county and lawyers representing victims is expected to be approved by the county claims board and Board of Supervisors later this month.

The county called the settlement “the costliest financial settlement in the history of L.A. County” and said it would have a “significant impact” on the county’s budget for years to come.