# Relationship history for MSHA mine 3003596

Current hierarchy: **James E  Beard → East Homer Sand & Gravel → Beard 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:** East Homer Sand & Gravel → Beard Mine; 2007-06-05 to 2011-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Edwin E  Beard → Beard Mine; 2007-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edwin E  Beard → East Homer Sand & Gravel; 2007-06-05 to 2011-06-27; source msha-controller-operator-history
- **operator_operates_mine:** East Homer Sand & Gravel → Beard Mine; 2011-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James E  Beard → Beard Mine; 2011-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Beard → East Homer Sand & Gravel; 2011-06-28 to current/open; source msha-controller-operator-history