# Relationship history for MSHA mine 1510081

Current hierarchy: **Crace Paris → Crace Elkhorn Coal Company Inc → No 2**

- 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:** Clevinger Grover Jr Et Al → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Prospect Coal Company → No 2; 1976-10-01 to 1978-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Clevinger Grover Jr Et Al → Prospect Coal Company; 1976-10-01 to 1978-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Newcomb Theodore → No 2; 1977-03-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Newcomb Coal Company → No 2; 1978-12-11 to 1984-06-06; source msha-controller-operator-history
- **controller_controls_operator:** Newcomb Theodore → Newcomb Coal Company; 1978-12-11 to 1984-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Bowling Charles D Et Al → No 2; 1983-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sabre Coal Company → No 2; 1984-06-07 to 1985-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Smith Paul D → No 2; 1984-06-07 to 1985-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Smith Paul D → Sabre Coal Company; 1984-06-07 to 1985-06-25; source msha-controller-operator-history
- **operator_operates_mine:** C & P Coal Company Inc → No 2; 1985-06-26 to 1987-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Bowling Charles D Et Al → C & P Coal Company Inc; 1985-06-26 to 1987-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Crace Paris → No 2; 1987-04-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crace Elkhorn Coal Company Inc → No 2; 1987-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crace Paris → Crace Elkhorn Coal Company Inc; 1987-04-16 to current/open; source msha-controller-operator-history