# Relationship history for MSHA mine 1512815

Current hierarchy: **Zepcevski Jovan & Theodore Parker → Joline Inc → No 1 Mine**

- 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:** Samoyed Energy Company Inc → No 1 Mine; 1981-04-01 to 1981-11-09; source msha-controller-operator-history
- **controller_controls_mine:** Marenko Clifford → No 1 Mine; 1981-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marenko Clifford → Samoyed Energy Company Inc; 1981-04-01 to 1981-11-09; source msha-controller-operator-history
- **operator_operates_mine:** Joline Inc → No 1 Mine; 1981-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zepcevski Jovan & Theodore Parker → No 1 Mine; 1981-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zepcevski Jovan & Theodore Parker → Joline Inc; 1981-11-10 to current/open; source msha-controller-operator-history