# Relationship history for MSHA mine 3609237

Current hierarchy: **Gregory S  Grover → Gregory S Grover → Stump Pond 1 & 2**

- 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:** Gregory S Grover → Stump Pond 1 & 2; 2004-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gregory S  Grover → Stump Pond 1 & 2; 2004-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory S  Grover → Gregory S Grover; 2004-04-27 to current/open; source msha-controller-operator-history