# Relationship history for MSHA mine 1519012

Current hierarchy: **Raliegh T  Harrington Jr; David  O'Brien → J Rogers Excavating LLC → No 1**

- 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:** Edsel H  Preece et al → No 1; 2003-07-21 to 2004-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Blanton → No 1; 2004-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Twin Resources L. L. C. → No 1; 2006-06-27 to 2006-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Edsel H  Preece et al → Twin Resources L. L. C.; 2006-06-27 to 2004-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Blanton → Twin Resources L. L. C.; 2006-06-27 to 2006-10-31; source msha-controller-operator-history
- **operator_operates_mine:** American Contracting Group LLC → No 1; 2006-11-01 to 2008-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Horton  et al → No 1; 2006-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Horton  et al → American Contracting Group LLC; 2006-11-01 to 2008-05-18; source msha-controller-operator-history
- **controller_controls_operator:** David  Ison  et al → American Contracting Group LLC; 2006-11-01 to 2008-05-18; source msha-controller-operator-history
- **operator_operates_mine:** J Rogers Excavating LLC → No 1; 2008-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Rogers → No 1; 2008-05-19 to 2008-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Rogers → J Rogers Excavating LLC; 2008-05-19 to 2008-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Raliegh T  Harrington Jr et al → No 1; 2008-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raliegh T  Harrington Jr et al → J Rogers Excavating LLC; 2008-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  O'Brien et al → J Rogers Excavating LLC; 2008-07-15 to current/open; source msha-controller-operator-history