# Relationship history for MSHA mine 4003040

Current hierarchy: **Asbury Charles M → Kline Coal Company Inc → 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:** Kline Coal Company Inc → No 7; 1991-05-01 to 1991-06-13; source msha-controller-operator-history
- **controller_controls_mine:** Asbury Harold F Et Al → No 7; 1991-05-01 to 1991-06-13; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Harold F Et Al → Kline Coal Company Inc; 1991-05-01 to 1991-06-13; source msha-controller-operator-history
- **operator_operates_mine:** Kline Coal Company Inc → No 7; 1991-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asbury Charles M → No 7; 1991-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Charles M → Kline Coal Company Inc; 1991-06-14 to current/open; source msha-controller-operator-history