# Relationship history for MSHA mine 4608968

Current hierarchy: **Patriot Coal Corporation → I O Coal Company, LLC → Dry Branch Coalburg**

- 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:** Chris  Cline → Dry Branch Coalburg; 1999-09-01 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Europa Coal Company, Inc. → Dry Branch Coalburg; 2002-08-28 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Cline → Dry Branch Coalburg; 2002-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Cline → Europa Coal Company, Inc.; 2002-08-28 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** I O Coal Company, LLC → Dry Branch Coalburg; 2003-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Cline → I O Coal Company, LLC; 2003-04-01 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Timothy G Elliott → Dry Branch Coalburg; 2003-04-01 to 2006-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Timothy G Elliott → I O Coal Company, LLC; 2003-04-01 to 2006-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Magnum Coal Company → Dry Branch Coalburg; 2006-03-18 to 2008-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Magnum Coal Company → I O Coal Company, LLC; 2006-03-18 to 2008-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Patriot Coal Corporation → Dry Branch Coalburg; 2008-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → I O Coal Company, LLC; 2008-07-23 to current/open; source msha-controller-operator-history