# Relationship history for MSHA mine 3610282

Current hierarchy: **William J  Brewer → Brewers Stone → Bunnell**

- 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:** Brewers Stone → Bunnell; 2019-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William J  Brewer → Bunnell; 2019-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William J  Brewer → Brewers Stone; 2019-04-22 to current/open; source msha-controller-operator-history