# Relationship history for MSHA mine 0402964

Current hierarchy: **Oil Dri Corporation Of America → TAFT PRODUCTION COMPANY → TAFT PRODUCTION COMPANY & MINES**

- 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:** Excel Mineral Company Inc → TAFT PRODUCTION COMPANY & MINES; 1950-01-01 to 1994-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Stephens Family Trust → TAFT PRODUCTION COMPANY & MINES; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephens Family Trust → Excel Mineral Company Inc; 1950-01-01 to 1994-07-12; source msha-controller-operator-history
- **operator_operates_mine:** A & M Products Inc → TAFT PRODUCTION COMPANY & MINES; 1994-07-13 to 2000-07-13; source msha-controller-operator-history
- **controller_controls_mine:** First Brands Corp → TAFT PRODUCTION COMPANY & MINES; 1994-07-13 to 2000-07-13; source msha-controller-operator-history
- **controller_controls_operator:** First Brands Corp → A & M Products Inc; 1994-07-13 to 2000-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Clorox Company → TAFT PRODUCTION COMPANY & MINES; 1999-01-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & M Products Manufacturing Company → TAFT PRODUCTION COMPANY & MINES; 2000-07-14 to 2002-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Clorox Company → A & M Products Manufacturing Company; 2000-07-14 to 2002-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Taft Production Company → TAFT PRODUCTION COMPANY & MINES; 2002-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Oil Dri Corporation Of America → TAFT PRODUCTION COMPANY & MINES; 2002-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oil Dri Corporation Of America → Taft Production Company; 2002-12-10 to current/open; source msha-controller-operator-history