# Relationship history for MSHA mine 1507057

Current hierarchy: **Collins Logan → Triple L Coal Corp → No 2 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

- **controller_controls_mine:** Ricky Coal Company → No 2 Mine; 1950-01-01 to 1974-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Ricky Coal Company → No 2 Mine; 1974-01-01 to 1974-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Ricky Coal Company → Ricky Coal Company; 1974-01-01 to 1974-08-15; source msha-controller-operator-history
- **operator_operates_mine:** In Law Coal Co → No 2 Mine; 1974-08-16 to 1976-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Hatton Billy Et Al → No 2 Mine; 1974-08-16 to 1976-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Hatton Billy Et Al → In Law Coal Co; 1974-08-16 to 1976-01-26; source msha-controller-operator-history
- **operator_operates_mine:** J & C Coal Co → No 2 Mine; 1976-01-27 to 1976-08-03; source msha-controller-operator-history
- **controller_controls_mine:** J & C Coal Company → No 2 Mine; 1976-01-27 to 1976-08-03; source msha-controller-operator-history
- **controller_controls_operator:** J & C Coal Company → J & C Coal Co; 1976-01-27 to 1976-08-03; source msha-controller-operator-history
- **controller_controls_mine:** Collins Logan → No 2 Mine; 1976-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple L Coal Corp → No 2 Mine; 1976-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Collins Logan → Triple L Coal Corp; 1976-08-04 to current/open; source msha-controller-operator-history