# Relationship history for MSHA mine 0100997

Current hierarchy: **Daniel P W Jr → J D J Mining Company Inc → Pit 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:** L L Jackson Coal Company → Pit No 1; 1950-01-01 to 1976-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Jackson L L → Pit No 1; 1950-01-01 to 1976-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Jackson L L → L L Jackson Coal Company; 1950-01-01 to 1976-01-29; source msha-controller-operator-history
- **operator_operates_mine:** J D J Mining Company Inc → Pit No 1; 1976-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel P W Jr → Pit No 1; 1976-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel P W Jr → J D J Mining Company Inc; 1976-01-30 to current/open; source msha-controller-operator-history