# Relationship history for MSHA mine 4702989

Current hierarchy: **Pavement Materials LLC → Todd'S Redi-Mix Concrete Llc → SAFFERT 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

- **operator_operates_mine:** Acw Trucking Inc → SAFFERT PIT; 1993-07-01 to 1998-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Widdes Todd A → SAFFERT PIT; 1993-07-01 to 1998-06-08; source msha-controller-operator-history
- **controller_controls_operator:** Widdes Todd A → Acw Trucking Inc; 1993-07-01 to 1998-06-08; source msha-controller-operator-history
- **operator_operates_mine:** Todd'S Redi-Mix Concrete Llc → SAFFERT PIT; 1998-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul T  Ayres → SAFFERT PIT; 1998-06-09 to 2004-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Paul T  Ayres → Todd'S Redi-Mix Concrete Llc; 1998-06-09 to 2004-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Pavement Materials LLC → SAFFERT PIT; 2004-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pavement Materials LLC → Todd'S Redi-Mix Concrete Llc; 2004-11-01 to current/open; source msha-controller-operator-history