# Relationship history for MSHA mine 2003527

Current hierarchy: **Christopher  Wingle → Hard Rock Quarry, LLC → HARD ROCK**

- 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:** Hard Rock Quarry, LLC → HARD ROCK; 2016-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christopher  Wingle → HARD ROCK; 2016-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Wingle → Hard Rock Quarry, LLC; 2016-02-11 to current/open; source msha-controller-operator-history