# Relationship history for MSHA mine 1401820

Current hierarchy: **Yachal  Benedick → CACO3 Quarry LLC → Slough Creek Quarry**

- 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:** Rawhide Quarry Supply Ltd. → Slough Creek Quarry; 2020-11-25 to 2021-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Larry Duane  Schoof → Slough Creek Quarry; 2020-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry Duane  Schoof → Rawhide Quarry Supply Ltd.; 2020-11-25 to 2021-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Stanley R Martin et al → Slough Creek Quarry; 2021-05-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Air Capitol Recycling → Slough Creek Quarry; 2021-10-05 to 2025-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Stanley R Martin et al → Air Capitol Recycling; 2021-10-05 to 2025-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Louis J Robelli et al → Air Capitol Recycling; 2021-10-05 to 2025-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Dena R Martin et al → Air Capitol Recycling; 2021-10-05 to 2025-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Rawhide Quarry Supply Ltd. → Slough Creek Quarry; 2025-06-21 to 2026-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Larry Duane  Schoof → Rawhide Quarry Supply Ltd.; 2025-06-21 to 2026-03-05; source msha-controller-operator-history
- **operator_operates_mine:** CACO3 Quarry LLC → Slough Creek Quarry; 2026-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Yachal  Benedick → Slough Creek Quarry; 2026-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Yachal  Benedick → CACO3 Quarry LLC; 2026-03-06 to current/open; source msha-controller-operator-history