# Relationship history for MSHA mine 4801672

Current hierarchy: **Rolf E  Nackerud; Jim J  Wise → Green River Stone & Crushing → Crusher #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Red Desert Gravel Inc. → Crusher #1; 2005-03-15 to 2020-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Jim J  Wise → Crusher #1; 2005-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim J  Wise → Red Desert Gravel Inc.; 2005-03-15 to 2020-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Green River Stone & Crushing → Crusher #1; 2020-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim J  Wise Et Al → Crusher #1; 2020-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim J  Wise Et Al → Green River Stone & Crushing; 2020-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rolf E  Nackerud Et Al → Green River Stone & Crushing; 2020-07-15 to current/open; source msha-controller-operator-history