# Relationship history for MSHA mine 3400862

Current hierarchy: **Carter O N → Carter & Son Inc → Coweta 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:** Go Go Sand Company Inc → Coweta Pit; 1950-01-01 to 1985-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Watkins E B → Coweta Pit; 1950-01-01 to 1985-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Watkins E B → Go Go Sand Company Inc; 1950-01-01 to 1985-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Carter O N → Coweta Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carter & Son Inc → Coweta Pit; 1985-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carter O N → Carter & Son Inc; 1985-11-21 to current/open; source msha-controller-operator-history