# Relationship history for MSHA mine 4002792

Current hierarchy: **Walden James D → Jimmy D Walden Coal Company → No 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:** Jerry Malicoat → No 1; 1982-06-01 to 1987-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Malicoat Jerry → No 1; 1982-06-01 to 1987-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Malicoat Jerry → Jerry Malicoat; 1982-06-01 to 1987-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Jimmy D Walden Coal Company → No 1; 1987-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Walden James D → No 1; 1987-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walden James D → Jimmy D Walden Coal Company; 1987-03-21 to current/open; source msha-controller-operator-history