# Relationship history for MSHA mine 1513821

Current hierarchy: **Ledford Terry & Roger Gray → Jetco Coal Company → No 3 Mine**

- 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:** Jones Jesse Et Al → No 3 Mine; 1981-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ledford Terry & Roger Gray Et Al → No 3 Mine; 1982-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Freeda Mining Company → No 3 Mine; 1982-10-01 to 1983-03-07; source msha-controller-operator-history
- **controller_controls_mine:** Miles James A & Leonard Mills → No 3 Mine; 1982-10-01 to 1983-03-07; source msha-controller-operator-history
- **controller_controls_operator:** Miles James A & Leonard Mills → Freeda Mining Company; 1982-10-01 to 1983-03-07; source msha-controller-operator-history
- **operator_operates_mine:** J & H Coal Company → No 3 Mine; 1983-03-08 to 1983-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Jones Jesse Et Al → J & H Coal Company; 1983-03-08 to 1983-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Jetco Coal Company → No 3 Mine; 1983-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ledford Terry & Roger Gray Et Al → Jetco Coal Company; 1983-03-24 to current/open; source msha-controller-operator-history