# Relationship history for MSHA mine 1514452

Current hierarchy: **Helton Beve → J & B Mining → 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:** Faith Coal Company → No 1 Mine; 1984-02-01 to 1984-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Warren Lyle Dean Et Al → No 1 Mine; 1984-02-01 to 1984-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Warren Lyle Dean Et Al → Faith Coal Company; 1984-02-01 to 1984-05-31; source msha-controller-operator-history
- **operator_operates_mine:** J & B Mining → No 1 Mine; 1984-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Helton Beve Et Al → No 1 Mine; 1984-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Helton Beve Et Al → J & B Mining; 1984-06-01 to current/open; source msha-controller-operator-history