# Relationship history for MSHA mine 4702741

Current hierarchy: **Pavement Materials LLC → Todd'S Redi-Mix Concrete LLC → Olson Road 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:** Wissota Sand & Gravel Company → Olson Road Pit; 1950-01-01 to 2019-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Wissota Sand & Gravel Company → Olson Road Pit; 1981-09-01 to 2001-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Wissota Sand & Gravel Company → Wissota Sand & Gravel Company; 1981-09-01 to 2001-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Paul T  Ayres → Olson Road Pit; 1998-06-09 to 2004-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Todd'S Redi-Mix Concrete LLC → Olson Road Pit; 2001-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul T  Ayres → Todd'S Redi-Mix Concrete LLC; 2001-02-14 to 2004-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Pavement Materials LLC → Olson Road 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
- **controller_controls_mine:** WSG Acquisition Corp → Olson Road Pit; 2019-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** WSG Acquisition Corp → Wissota Sand & Gravel Company; 2019-10-31 to 2001-02-13; source msha-controller-operator-history