# Relationship history for MSHA mine 1700705

Current hierarchy: **Peter C  Overlock → Peter Overlock Inc → HARD ROCK QUARRY**

- 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:** D L Overlock Excavation → HARD ROCK QUARRY; 2001-06-01 to 2013-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Dwight  Overlock → HARD ROCK QUARRY; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dwight  Overlock → D L Overlock Excavation; 2001-06-01 to 2013-08-05; source msha-controller-operator-history
- **operator_operates_mine:** D L Overlock Excavation LLC → HARD ROCK QUARRY; 2013-08-06 to 2025-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Dwight  Overlock → HARD ROCK QUARRY; 2013-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dwight  Overlock → D L Overlock Excavation LLC; 2013-08-06 to 2025-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Peter Overlock Inc → HARD ROCK QUARRY; 2025-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter C  Overlock → HARD ROCK QUARRY; 2025-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter C  Overlock → Peter Overlock Inc; 2025-08-21 to current/open; source msha-controller-operator-history