# Relationship history for MSHA mine 2302601

Current hierarchy: **(Lowell) Austin  Williams; Christopher C Williams → Bluewing Materials → Branson Stone**

- 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:** (Lowell) Austin  Williams et al → Branson Stone; 2024-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bluewing Materials → Branson Stone; 2026-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** (Lowell) Austin  Williams et al → Bluewing Materials; 2026-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher C Williams et al → Bluewing Materials; 2026-04-06 to current/open; source msha-controller-operator-history