# Relationship history for MSHA mine 1518597

Current hierarchy: **Arch Resources Inc → ICG East Kentucky LLC → Peelpoplar**

- 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

- **controller_controls_mine:** Horizon Natural Resources Incorporated → Peelpoplar; 1999-06-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sunny Ridge Mining Co., Inc. → Peelpoplar; 2002-12-10 to 2006-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Sunny Ridge Mining Co., Inc.; 2002-12-10 to 2006-01-05; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Peelpoplar; 2004-10-27 to 2011-06-14; source msha-controller-operator-history
- **operator_operates_mine:** ICG East Kentucky LLC → Peelpoplar; 2006-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → ICG East Kentucky LLC; 2006-01-06 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Peelpoplar; 2011-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → ICG East Kentucky LLC; 2011-06-15 to current/open; source msha-controller-operator-history