# Relationship history for MSHA mine 1200097

Current hierarchy: **David G Fell; Lauren  Roberts → B G Hoadley Quarries Inc → Guthrie 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** B G Hoadley Quarries Inc → Guthrie Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patsy H  Fell-Barker → Guthrie Quarry; 1950-01-01 to 2021-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Patsy H  Fell-Barker → B G Hoadley Quarries Inc; 1950-01-01 to 2021-08-03; source msha-controller-operator-history
- **controller_controls_mine:** Lauren  Roberts et al → Guthrie Quarry; 2021-08-04 to 2024-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Lauren  Roberts et al → B G Hoadley Quarries Inc; 2021-08-04 to 2024-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Patsy H Fell-Barker et al → B G Hoadley Quarries Inc; 2021-08-04 to 2024-06-09; source msha-controller-operator-history
- **controller_controls_operator:** David G Fell et al → B G Hoadley Quarries Inc; 2021-08-04 to 2024-06-09; source msha-controller-operator-history
- **controller_controls_mine:** David G Fell et al → Guthrie Quarry; 2024-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David G Fell et al → B G Hoadley Quarries Inc; 2024-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lauren  Roberts et al → B G Hoadley Quarries Inc; 2024-06-10 to current/open; source msha-controller-operator-history