# Relationship history for MSHA mine 1601067

Current hierarchy: **Terri  Bunch; Tonya  Newstrom; Hollis  Bunch → Bunch Gravel, Inc → Bunch Gravel Pit 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:** Bunch Gravel Company → Bunch Gravel Pit 1; 1985-10-01 to 2017-01-24; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Bunch → Bunch Gravel Pit 1; 1985-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Bunch → Bunch Gravel Company; 1985-10-01 to 2017-01-24; source msha-controller-operator-history
- **operator_operates_mine:** Bunch Gravel, Inc → Bunch Gravel Pit 1; 2017-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carlette  Dawson et al → Bunch Gravel Pit 1; 2017-01-25 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Carlette  Dawson et al → Bunch Gravel, Inc; 2017-01-25 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Terri Nell  Bunch et al → Bunch Gravel, Inc; 2017-01-25 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Tonya  Newstrom et al → Bunch Gravel, Inc; 2017-01-25 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Hollis  Bunch et al → Bunch Gravel, Inc; 2017-01-25 to 2024-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Tonya  Newstrom et al → Bunch Gravel Pit 1; 2024-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tonya  Newstrom et al → Bunch Gravel, Inc; 2024-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terri  Bunch et al → Bunch Gravel, Inc; 2024-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hollis  Bunch et al → Bunch Gravel, Inc; 2024-04-01 to current/open; source msha-controller-operator-history