# Relationship history for MSHA mine 1800658

Current hierarchy: **Bracken Laverne → Brawal Mining Inc → Bittinger 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

- **controller_controls_mine:** Bracken Laverne → Bittinger Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brawal Mining Inc → Bittinger Mine; 1978-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bracken Laverne → Brawal Mining Inc; 1978-05-01 to current/open; source msha-controller-operator-history