# Relationship history for MSHA mine 1401534

Current hierarchy: **Shilling Michael D & Gary L Wacker → Kanopolis Crushed Rock Inc → Kanopolis Crushed Rock Incorporated**

- 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:** Robert L  Wacker et al → Kanopolis Crushed Rock Incorporated; 1981-10-22 to 2017-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Hi-Plains Sand Inc → Kanopolis Crushed Rock Incorporated; 1990-03-01 to 1993-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Wacker et al → Hi-Plains Sand Inc; 1990-03-01 to 1993-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Gary L  Wacker et al → Hi-Plains Sand Inc; 1990-03-01 to 1993-04-13; source msha-controller-operator-history
- **operator_operates_mine:** Kanopolis Crushed Rock Inc → Kanopolis Crushed Rock Incorporated; 1993-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shilling Michael D & Gary L Wacker → Kanopolis Crushed Rock Incorporated; 1993-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shilling Michael D & Gary L Wacker → Kanopolis Crushed Rock Inc; 1993-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justin C  Wacker et al → Kanopolis Crushed Rock Incorporated; 2017-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin C  Wacker et al → Hi-Plains Sand Inc; 2017-11-14 to 1993-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Todd A  Wacker et al → Hi-Plains Sand Inc; 2017-11-14 to 1993-04-13; source msha-controller-operator-history