# Relationship history for MSHA mine 3609138

Current hierarchy: **Kerry  Harris → Harris Coal Co. → No 1 Slope**

- 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:** Jerry W  Lucas Jr → No 1 Slope; 1987-11-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Six M Coal Company → No 1 Slope; 2003-04-15 to 2006-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Ronald  Roseman → No 1 Slope; 2003-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Roseman → Six M Coal Company; 2003-04-15 to 2006-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Six M Coal Company → No 1 Slope; 2006-02-01 to 2007-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Ryan D  Boyer → No 1 Slope; 2006-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan D  Boyer → Six M Coal Company; 2006-02-01 to 2007-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Six M Coal Co → No 1 Slope; 2007-03-07 to 2009-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Roseman → Six M Coal Co; 2007-03-07 to 2009-03-05; source msha-controller-operator-history
- **operator_operates_mine:** R & K Coal Company Inc → No 1 Slope; 2009-03-06 to 2009-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Jerry W  Lucas Jr → R & K Coal Company Inc; 2009-03-06 to 2009-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Kerry  Harris → No 1 Slope; 2009-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harris Coal Co. → No 1 Slope; 2009-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kerry  Harris → Harris Coal Co.; 2009-09-21 to current/open; source msha-controller-operator-history