# Relationship history for MSHA mine 4604383

Current hierarchy: **Keeney Timothy A → Level Land Mining Corp → No 1 Strip**

- 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:** Craddock & Son Coal Company Inc → No 1 Strip; 1974-10-10 to 1992-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Craddock Robert L & Robert P → No 1 Strip; 1974-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craddock Robert L & Robert P → Craddock & Son Coal Company Inc; 1974-10-10 to 1992-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Level Land Mining Corp → No 1 Strip; 1992-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keeney Timothy A → No 1 Strip; 1992-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keeney Timothy A → Level Land Mining Corp; 1992-06-10 to current/open; source msha-controller-operator-history