# Relationship history for MSHA mine 3610040

Current hierarchy: **Joel M  Welch → J W Flagstone → M I Desi 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** J W Flagstone → M I Desi Mine; 2012-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joel M  Welch → M I Desi Mine; 2012-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel M  Welch → J W Flagstone; 2012-12-06 to current/open; source msha-controller-operator-history