# Relationship history for MSHA mine 1508337

Current hierarchy: **Mullins Ron → Jo-B Coal 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:** Loftis W K → No 1; 1950-01-01 to 1981-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Loftis Coal Company Inc → No 1; 1975-05-13 to 1981-01-21; source msha-controller-operator-history
- **controller_controls_operator:** Loftis W K → Loftis Coal Company Inc; 1975-05-13 to 1981-01-21; source msha-controller-operator-history
- **operator_operates_mine:** Sharondale Corp → No 1; 1981-01-22 to 1985-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Brinco Ltd → No 1; 1981-01-22 to 1985-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Brinco Ltd → Sharondale Corp; 1981-01-22 to 1985-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Marenko Clifford → No 1; 1981-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Samoyed Energy Company Inc → No 1; 1985-01-11 to 1990-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Marenko Clifford → Samoyed Energy Company Inc; 1985-01-11 to 1990-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Jo-B Coal Inc → No 1; 1990-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Ron → No 1; 1990-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Ron → Jo-B Coal Inc; 1990-07-27 to current/open; source msha-controller-operator-history