# Relationship history for MSHA mine 4002299

Current hierarchy: **Horn Luther A Jr → Alco Coal Company Inc → No 1 Surface**

- 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:** Moffeitt Mining Company → No 1 Surface; 1977-07-01 to 1978-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Jones E J → No 1 Surface; 1977-07-01 to 1978-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Jones E J → Moffeitt Mining Company; 1977-07-01 to 1978-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Alco Coal Company Inc → No 1 Surface; 1978-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Horn Luther A Jr → No 1 Surface; 1978-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horn Luther A Jr → Alco Coal Company Inc; 1978-03-06 to current/open; source msha-controller-operator-history