# Relationship history for MSHA mine 2300123

Current hierarchy: **Stephen L  Gilliam → Kitson Quarry → KITSON QUARRY**

- 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:** Kitson Quarry & Materials Inc → KITSON QUARRY; 1950-01-01 to 2000-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Kermit  Kitson → KITSON QUARRY; 1950-01-01 to 2000-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Kermit  Kitson → Kitson Quarry & Materials Inc; 1950-01-01 to 2000-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Kitson Quarry → KITSON QUARRY; 2000-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen L  Gilliam → KITSON QUARRY; 2000-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen L  Gilliam → Kitson Quarry; 2000-02-03 to current/open; source msha-controller-operator-history