# Relationship history for MSHA mine 3608207

Current hierarchy: **Marvin  Hays → J M W Enterprises Inc → Kelly 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** J M W Enterprises Inc → Kelly No 1; 1990-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marvin  Hays → Kelly No 1; 1990-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin  Hays → J M W Enterprises Inc; 1990-11-01 to current/open; source msha-controller-operator-history