# Relationship history for MSHA mine 2402784

Current hierarchy: **Lee  Bergeson → High Country Earthworks LLC → Portable 2**

- 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:** David  Wiediger → Portable 2; 2011-04-07 to 2013-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Kip A  McClendon → Portable 2; 2013-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lee  Bergeson → Portable 2; 2022-11-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rock It Crushing → Portable 2; 2023-04-05 to 2025-02-23; source msha-controller-operator-history
- **controller_controls_operator:** David  Wiediger → Rock It Crushing; 2023-04-05 to 2013-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Kip A  McClendon → Rock It Crushing; 2023-04-05 to 2025-02-23; source msha-controller-operator-history
- **operator_operates_mine:** High Country Earthworks LLC → Portable 2; 2025-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lee  Bergeson → High Country Earthworks LLC; 2025-02-24 to current/open; source msha-controller-operator-history