# Relationship history for MSHA mine 1510500

Current hierarchy: **Bartley Clinton → Ace Colliery 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Coleman Clifford → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M S Mining Company Inc → No 1; 1977-06-01 to 1978-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Virgil → No 1; 1977-06-01 to 1978-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Virgil → M S Mining Company Inc; 1977-06-01 to 1978-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Winn Branch Coal Company → No 1; 1978-06-29 to 1982-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Fannin et al → No 1; 1978-06-29 to 1982-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Fannin et al → Winn Branch Coal Company; 1978-06-29 to 1982-08-08; source msha-controller-operator-history
- **operator_operates_mine:** Mountain View Coal Company Inc → No 1; 1982-08-09 to 1982-09-26; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Clifford → Mountain View Coal Company Inc; 1982-08-09 to 1982-09-26; source msha-controller-operator-history
- **operator_operates_mine:** Ace Colliery Inc → No 1; 1982-09-27 to 1985-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Bartley Eppie R → No 1; 1982-09-27 to 1985-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Bartley Eppie R → Ace Colliery Inc; 1982-09-27 to 1985-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Ace Colliery Inc → No 1; 1985-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bartley Clinton → No 1; 1985-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bartley Clinton → Ace Colliery Inc; 1985-08-20 to current/open; source msha-controller-operator-history