# Relationship history for MSHA mine 4702546

Current hierarchy: **Eder Tom → Sherman Lime & Rock Company → Sherman Lime And Rock 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:** Sherman Lime & Rock Company → Sherman Lime And Rock Quarry; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eder Tom → Sherman Lime And Rock Quarry; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eder Tom → Sherman Lime & Rock Company; 1978-03-09 to current/open; source msha-controller-operator-history