# Relationship history for MSHA mine 4607305

Current hierarchy: **Davis James O → M & D Mining Company Inc → No 1**

- 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:** Max Contractors Inc → No 1; 1987-05-01 to 1987-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Barnett Gary Et Al → No 1; 1987-05-01 to 1987-12-29; source msha-controller-operator-history
- **controller_controls_operator:** Barnett Gary Et Al → Max Contractors Inc; 1987-05-01 to 1987-12-29; source msha-controller-operator-history
- **operator_operates_mine:** M & D Mining Company Inc → No 1; 1987-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Davis James O Et Al → No 1; 1987-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Davis James O Et Al → M & D Mining Company Inc; 1987-12-30 to current/open; source msha-controller-operator-history