# Relationship history for MSHA mine 1502107

Current hierarchy: **Danny  Justus → Quad Fuel 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:** Kentucky Carbon Corp → No 1; 1950-01-01 to 1993-11-23; source msha-controller-operator-history
- **controller_controls_mine:** ITT Corporation → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ITT Corporation → Kentucky Carbon Corp; 1950-01-01 to 1993-11-23; source msha-controller-operator-history
- **operator_operates_mine:** Quad Fuel Inc → No 1; 1993-11-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Danny  Justus → No 1; 1993-11-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Justus → Quad Fuel Inc; 1993-11-24 to current/open; source msha-controller-operator-history