# Relationship history for MSHA mine 1601621

Current hierarchy: **Terri  Bunch; Tonya  Newstrom; Hollis  Bunch → Bunch Gravel Inc → Bunch Gravel Pit 3**

- 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

- **controller_controls_mine:** Terri Nell  Bunch et al → Bunch Gravel Pit 3; 2017-01-25 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Tonya  Newstrom et al → Bunch Gravel Pit 3; 2024-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bunch Gravel Inc → Bunch Gravel Pit 3; 2025-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terri Nell  Bunch et al → Bunch Gravel Inc; 2025-12-10 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Hollis  Bunch et al → Bunch Gravel Inc; 2025-12-10 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Tonya  Newstrom et al → Bunch Gravel Inc; 2025-12-10 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Carlette  Dawson et al → Bunch Gravel Inc; 2025-12-10 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Tonya  Newstrom et al → Bunch Gravel Inc; 2025-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hollis  Bunch et al → Bunch Gravel Inc; 2025-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terri  Bunch et al → Bunch Gravel Inc; 2025-12-10 to current/open; source msha-controller-operator-history