# Relationship history for MSHA mine 1510741

Current hierarchy: **Ashby James M → Aleta Coal Company Inc → 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:** Aleta Coal Company Inc → No 1 Mine; 1977-08-01 to 1978-01-12; source msha-controller-operator-history
- **controller_controls_mine:** Hensley Bennie H → No 1 Mine; 1977-08-01 to 1978-01-12; source msha-controller-operator-history
- **controller_controls_operator:** Hensley Bennie H → Aleta Coal Company Inc; 1977-08-01 to 1978-01-12; source msha-controller-operator-history
- **operator_operates_mine:** Aleta Coal Company Inc → No 1 Mine; 1978-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ashby James M Et Al → No 1 Mine; 1978-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashby James M Et Al → Aleta Coal Company Inc; 1978-01-13 to current/open; source msha-controller-operator-history