# Relationship history for MSHA mine 1202103

Current hierarchy: **Peabody Energy Corporation → Peabody Midwest Mining, LLC → Air Quality Hart Street South**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Solar Sources Underground L L C → Air Quality Hart Street South; 1991-07-01 to 2005-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Felson  Bowman → Air Quality Hart Street South; 1991-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Felson  Bowman → Solar Sources Underground L L C; 1991-07-01 to 2005-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → Air Quality Hart Street South; 1997-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Peabody Midwest Mining, LLC → Air Quality Hart Street South; 2005-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Peabody Midwest Mining, LLC; 2005-12-21 to current/open; source msha-controller-operator-history