# Relationship history for MSHA mine 4604716

Current hierarchy: **Sherman Jerry → M T R Mining Corp → Mtr No 6 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Sherman Jerry → Mtr No 6 Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M T R Mining Corp → Mtr No 6 Mine; 1975-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sherman Jerry → M T R Mining Corp; 1975-09-02 to current/open; source msha-controller-operator-history