NEW ORLEANS - Eleven men died in the 2010 rig explosion that led to BP's Gulf oil spill, but a jury will hear about only four during a rig supervisor's trial later this month.

U.S. District Judge Stanwood Duval Jr. ruled Wednesday that the deaths aren't relevant to the case now that federal prosecutors have dropped manslaughter charges against Robert Kaluza.

If the case goes to trial Feb. 16, Duval said he will inform jurors about the deaths of four workers - Dewey Revette, Jason Anderson, Donald Clark, and Stephen Curtis - because they participated in a key safety test shortly before the explosion. Prosecutors say Kaluza and another rig supervisor, Donald Vidrine, botched the test.

Kaluza is charged with one misdemeanor count of violating the Clean Water Act.