# Relationship history for MSHA mine 1513068

Current hierarchy: **Horton Steve → H & A Coal Company → No 1 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

- **operator_operates_mine:** Jubilee Coal Corp → No 1 Mine; 1981-08-01 to 1982-02-22; source msha-controller-operator-history
- **controller_controls_mine:** Hurley Danny R → No 1 Mine; 1981-08-01 to 1984-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Hurley Danny R → Jubilee Coal Corp; 1981-08-01 to 1982-02-22; source msha-controller-operator-history
- **operator_operates_mine:** H & A Coal Company → No 1 Mine; 1982-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Horton Steve → No 1 Mine; 1982-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horton Steve → H & A Coal Company; 1982-02-23 to current/open; source msha-controller-operator-history