# Relationship history for MSHA mine 1506737

Current hierarchy: **Natomas Company → Brown Badgett Inc → Livermore 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:** Badgett Brown Jr → Livermore Mine; 1970-09-01 to 1978-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Brown Badgett Inc → Livermore Mine; 1973-01-01 to 1978-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Badgett Brown Jr → Brown Badgett Inc; 1973-01-01 to 1978-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Brown Badgett Inc → Livermore Mine; 1978-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Natomas Company → Livermore Mine; 1978-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Natomas Company → Brown Badgett Inc; 1978-04-26 to current/open; source msha-controller-operator-history