# Relationship history for MSHA mine 3302532

Current hierarchy: **Mc Cort David J → Darmac Combustion Inc → Coonville - Strip**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Raven Hocking Coal Corp → Coonville - Strip; 1950-01-01 to 1973-12-05; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Russell R → Coonville - Strip; 1950-01-01 to 1973-12-05; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Russell R → Raven Hocking Coal Corp; 1950-01-01 to 1973-12-05; source msha-controller-operator-history
- **operator_operates_mine:** Mack Energy Company → Coonville - Strip; 1973-12-06 to 1989-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Mc Cort Michael B → Coonville - Strip; 1973-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Cort Michael B → Mack Energy Company; 1973-12-06 to 1989-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Darmac Combustion Inc → Coonville - Strip; 1989-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Cort David J → Coonville - Strip; 1989-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Cort David J → Darmac Combustion Inc; 1989-05-17 to current/open; source msha-controller-operator-history