# Relationship history for MSHA mine 1516928

Current hierarchy: **Kenneth  Rowe → Levisa Coal Inc → No 4**

- 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:** Kenneth  Rowe → No 4; 1987-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chenoa Coal Inc → No 4; 1990-07-01 to 1992-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Ratliff et al → No 4; 1990-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Ratliff et al → Chenoa Coal Inc; 1990-07-01 to 1992-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Timmy  Ratliff et al → Chenoa Coal Inc; 1990-07-01 to 1992-05-25; source msha-controller-operator-history
- **operator_operates_mine:** B & A Coal Company Inc → No 4; 1992-05-26 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Adkins Barbara J → No 4; 1992-05-26 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Barbara J → B & A Coal Company Inc; 1992-05-26 to 1994-02-21; source msha-controller-operator-history
- **operator_operates_mine:** Levisa Coal Inc → No 4; 1994-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Rowe → Levisa Coal Inc; 1994-02-22 to current/open; source msha-controller-operator-history