# Relationship history for MSHA mine 1509883

Current hierarchy: **Bailey Lexie → Ken-Lick Coal Inc → Mine No 11**

- 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:** Bailey Lexie → Mine No 11; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Williams & Dixon Construction Company Inc → Mine No 11; 1976-07-22 to 1976-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Dixon Thomas W → Mine No 11; 1976-07-22 to 1976-11-11; source msha-controller-operator-history
- **controller_controls_operator:** Dixon Thomas W → Williams & Dixon Construction Company Inc; 1976-07-22 to 1976-11-11; source msha-controller-operator-history
- **operator_operates_mine:** Oldfield Coal Company → Mine No 11; 1976-11-12 to 1984-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Oldfield Tommie → Mine No 11; 1976-11-12 to 1984-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Oldfield Tommie → Oldfield Coal Company; 1976-11-12 to 1984-06-04; source msha-controller-operator-history
- **operator_operates_mine:** Ken-Lick Coal Inc → Mine No 11; 1984-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Lexie → Ken-Lick Coal Inc; 1984-06-05 to current/open; source msha-controller-operator-history