# Relationship history for MSHA mine 4605888

Current hierarchy: **Hale William L & Bobby → B & B Energy 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:** Bear Creek Coal Company → No 1 Mine; 1978-10-01 to 1979-10-21; source msha-controller-operator-history
- **controller_controls_mine:** Watts James O & Eugene Miller → No 1 Mine; 1978-10-01 to 1979-10-21; source msha-controller-operator-history
- **controller_controls_operator:** Watts James O & Eugene Miller → Bear Creek Coal Company; 1978-10-01 to 1979-10-21; source msha-controller-operator-history
- **operator_operates_mine:** B & B Energy Inc → No 1 Mine; 1979-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hale William L & Bobby → No 1 Mine; 1979-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hale William L & Bobby → B & B Energy Inc; 1979-10-22 to current/open; source msha-controller-operator-history