# Relationship history for MSHA mine 0301568

Current hierarchy: **Hester Wayne E → Arkansas Coal Production → Larson Coal Co Mine #1**

- 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:** Larson Coal Company → Larson Coal Co Mine #1; 1984-04-01 to 1984-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Vollmer Edward C → Larson Coal Co Mine #1; 1984-04-01 to 1984-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Vollmer Edward C → Larson Coal Company; 1984-04-01 to 1984-07-24; source msha-controller-operator-history
- **operator_operates_mine:** Arkansas Coal Production → Larson Coal Co Mine #1; 1984-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hester Wayne E → Larson Coal Co Mine #1; 1984-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hester Wayne E → Arkansas Coal Production; 1984-07-25 to current/open; source msha-controller-operator-history