# Relationship history for MSHA mine 1510072

Current hierarchy: **Brown Paul & Raymond Banks → C & H 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:** C & H Coal Company → No 1 Mine; 1976-11-02 to 1977-04-12; source msha-controller-operator-history
- **controller_controls_mine:** Hodger Bufford & Ed Cornett → No 1 Mine; 1976-11-02 to 1977-04-12; source msha-controller-operator-history
- **controller_controls_operator:** Hodger Bufford & Ed Cornett → C & H Coal Company; 1976-11-02 to 1977-04-12; source msha-controller-operator-history
- **operator_operates_mine:** C & H Coal Company → No 1 Mine; 1977-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brown Paul & Raymond Banks → No 1 Mine; 1977-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brown Paul & Raymond Banks → C & H Coal Company; 1977-04-13 to current/open; source msha-controller-operator-history