# Relationship history for MSHA mine 4003573

Current hierarchy: **Kelly  Grimes → Kelly Grimes Stone → Greentown Operation**

- 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:** Kelly Grimes Stone → Greentown Operation; 2022-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kelly  Grimes → Greentown Operation; 2022-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelly  Grimes → Kelly Grimes Stone; 2022-01-25 to current/open; source msha-controller-operator-history