# Relationship history for MSHA mine 0801151

Current hierarchy: **Abcot Clay Sand & Gravel Inc → C D S Trucking Corp → Abcot Clay Sand & Gravel Inc**

- 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:** C D S Trucking Corp → Abcot Clay Sand & Gravel Inc; 1991-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Abcot Clay Sand & Gravel Inc → Abcot Clay Sand & Gravel Inc; 1991-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Abcot Clay Sand & Gravel Inc → C D S Trucking Corp; 1991-02-01 to current/open; source msha-controller-operator-history