# Relationship history for MSHA mine 4404193

Current hierarchy: **Potter Clyde → Clydes Mining Corp → Surface No 1**

- 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:** Clydes Mining Corp → Surface No 1; 1975-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Potter Clyde → Surface No 1; 1975-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Potter Clyde → Clydes Mining Corp; 1975-10-01 to current/open; source msha-controller-operator-history