# Relationship history for MSHA mine 0103258

Current hierarchy: **S T  Bunn Jr → BUNN BROTHERS MATERIALS INC → TUSCALOOSA QUARRY/HOWTON PIT**

- 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:** S T  Bunn Jr et al → TUSCALOOSA QUARRY/HOWTON PIT; 1996-11-14 to 2021-03-12; source msha-controller-operator-history
- **operator_operates_mine:** Bunn Brothers Materials Inc → TUSCALOOSA QUARRY/HOWTON PIT; 2003-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** S T  Bunn Jr et al → Bunn Brothers Materials Inc; 2003-01-23 to 2021-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Bunn et al → Bunn Brothers Materials Inc; 2003-01-23 to 2021-03-12; source msha-controller-operator-history
- **controller_controls_mine:** S T  Bunn Jr → TUSCALOOSA QUARRY/HOWTON PIT; 2021-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** S T  Bunn Jr → Bunn Brothers Materials Inc; 2021-03-13 to current/open; source msha-controller-operator-history