# Relationship history for MSHA mine 1502216

Current hierarchy: **Adams Luther → Marlboro 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

- **controller_controls_mine:** Bailey Vernon E → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → No 1; 1950-01-01 to 1972-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1950-01-01 to 1972-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Bailey Mining Company Inc → No 1; 1972-11-15 to 1978-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Vernon E → Bailey Mining Company Inc; 1972-11-15 to 1978-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Tansy Beth Mining Company Inc → No 1; 1978-06-24 to 1981-08-18; source msha-controller-operator-history
- **controller_controls_mine:** Hall Claude Jr → No 1; 1978-06-24 to 1982-03-03; source msha-controller-operator-history
- **controller_controls_operator:** Hall Claude Jr → Tansy Beth Mining Company Inc; 1978-06-24 to 1981-08-18; source msha-controller-operator-history
- **operator_operates_mine:** Wiley & Dixon Inc → No 1; 1981-08-19 to 1983-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Wiley Virgil-Robert Dixon Et Al → No 1; 1981-08-19 to 1983-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Wiley Virgil-Robert Dixon Et Al → Wiley & Dixon Inc; 1981-08-19 to 1983-02-06; source msha-controller-operator-history
- **operator_operates_mine:** Marlboro Mining Company Inc → No 1; 1983-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Luther → No 1; 1983-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Luther → Marlboro Mining Company Inc; 1983-02-07 to current/open; source msha-controller-operator-history