# Relationship history for MSHA mine 4605889

Current hierarchy: **Lanager Thomas R → Chestnut Ridge Coal Corp → Evans Job**

- 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:** Thomson Norman → Evans Job; 1974-08-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L C Coal Company Inc → Evans Job; 1978-10-01 to 1979-10-01; source msha-controller-operator-history
- **controller_controls_operator:** Thomson Norman → L C Coal Company Inc; 1978-10-01 to 1979-10-01; source msha-controller-operator-history
- **operator_operates_mine:** Chestnut Ridge Coal Corp → Evans Job; 1979-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lanager Thomas R → Evans Job; 1979-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lanager Thomas R → Chestnut Ridge Coal Corp; 1979-10-02 to current/open; source msha-controller-operator-history