# Relationship history for MSHA mine 1511859

Current hierarchy: **Combs Jimmie → Lyon County Coal Company → Lyon County Coal**

- 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:** Lyon County Coal Company Inc → Lyon County Coal; 1979-04-01 to 1980-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Carman Donald C → Lyon County Coal; 1979-04-01 to 1980-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Carman Donald C → Lyon County Coal Company Inc; 1979-04-01 to 1980-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Lyon County Coal Company → Lyon County Coal; 1980-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Combs Jimmie → Lyon County Coal; 1980-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Combs Jimmie → Lyon County Coal Company; 1980-08-23 to current/open; source msha-controller-operator-history