# Relationship history for MSHA mine 4000557

Current hierarchy: **Asbury Harold F → Dan Branch Mining 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:** Braden Mountain Coal Company → No 1 Mine; 1950-01-01 to 1975-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Braden Mountain Coal Company → No 1 Mine; 1950-01-01 to 1975-02-03; source msha-controller-operator-history
- **controller_controls_operator:** Braden Mountain Coal Company → Braden Mountain Coal Company; 1950-01-01 to 1975-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Asbury Harold F Et Al → No 1 Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dan Branch Mining Company Inc → No 1 Mine; 1975-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Harold F Et Al → Dan Branch Mining Company Inc; 1975-02-04 to current/open; source msha-controller-operator-history