# Relationship history for MSHA mine 1513871

Current hierarchy: **Crawford Tim → Zonda Lee Coal Company → No 7**

- 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

- **operator_operates_mine:** Black Face Coal Company → No 7; 1983-01-01 to 1983-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Tyree Charles E Et Al → No 7; 1983-01-01 to 1983-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Tyree Charles E Et Al → Black Face Coal Company; 1983-01-01 to 1983-01-11; source msha-controller-operator-history
- **operator_operates_mine:** W & J Coal Company → No 7; 1983-01-12 to 1983-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Compton Gary-John Lane Jr Et Al → No 7; 1983-01-12 to 1983-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Compton Gary-John Lane Jr Et Al → W & J Coal Company; 1983-01-12 to 1983-03-28; source msha-controller-operator-history
- **operator_operates_mine:** Zonda Lee Coal Company → No 7; 1983-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crawford Tim → No 7; 1983-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crawford Tim → Zonda Lee Coal Company; 1983-03-29 to current/open; source msha-controller-operator-history