DETROIT--Detroit and its creditors are scheduled to return to mediation talks only days before the city plans to file its debt-cutting plan in federal bankruptcy court.

A draft of the 99-page plan seen by The Wall Street Journal was sent to the city's major creditors late last month by Detroit Emergency Manager Kevyn Orr. It separates the city's creditors into 27 classes. Of those, 16 are considered to be impaired, or liable to receive something less than they are owed. Those creditors, according to the city, would also have...